Methods and systems for sampling from heavy oil reservoir beds

FIELD: oil and gas industry.

SUBSTANCE: invention refers to transporting samples of fluid mediums and/or rheological measurements to surface of division. According to one of versions the method consists in circulating heated fluid medium in the first region of the reservoir bed wherein a composition of heavy oil is present or considered present with implementation of a pump assembled on the surface and an installation for well completion containing a well pump and a sampling tool within the period of time and at consumption adequate for obtaining fluid composition of heavy oil; then sampling of fluid composition of heavy oil is performed by means of the sampling tool.

EFFECT: facilitation of sampling from reservoir bed by means of device or its part used for supply of heat into reservoir bed region in question.

20 cl, 14 dwg

 

Background of invention

1. The technical field to which the invention relates.

The invention relates in General to the field of transporting sample fluid and/or rheological measurements on the boundary surfaces under conditions of temperature and pressure existing in the source of the sample, or, at least, at temperatures different from the ambient temperature, including, but not restrictively, the fluid medium on the basis of the hydrocarbon reservoir and water-based drilling muds, fluids gap, etc. that have multiple phases (solids and liquid).

2. Prior art

The need for sampling formation fluid from wells for chemical and physical analysis has long been recognized as the oil companies, and such sampling firm Schlumberger, the assignee of the present invention has been pursuing for many years. Samples of the reservoir fluid, also known as fluid collector, as a rule, take as early as possible during the lifetime of the collector for analysis on the surface, but rather in specialized laboratories. Information provided by this analysis is vital in the planning and development of hydrocarbon reservoirs, as well as when assessing the pickup and the operating parameters of the header.

The process of sampling from STV is as well involves lowering a sampling tool for collecting samples or multiple samples of the reservoir fluid medium due to contact between the probe element of the sampling tool and the wall of the wellbore. Many well-known sampling tools generate a pressure difference across such contact to ensure the flow of reservoir fluid into one or more chambers for samples within the sampling tool. This and similar processes are described in U.S. patent No. 4850581 and 4936139 (both assigned to the firm Schlumberger), U.S. patent No. 5303775 and 5377755 (both assigned company Western Atlas) and in U.S. patent No. 5934375 (assigned Halliburton). Other examples of downhole sampling tools described in published application U.S. No. 20050082059, 20050279499 and 20060175053, all of which are assigned to the assignee of the present invention. These documents are included in the description, as they are described downhole sampling tools. Also known the necessity to include at least one camera, and often many of these cameras with the appropriate valves and connections flow lines inside the "modules for samples." The sampling tool of each type provides certain advantages under certain conditions. The tools described in known publications usually are probing sampling tools for new wells that were drilled in excess of the completed drilling clay mud and have the seal mud cake between the barrel of the m wells under higher pressure, and a collector under lower pressure. The present invention is intended for a production well from which removed the drilling mud, in which there is no mud cake, and the pressure in the wellbore is less than the pressure in the reservoir. Heat input using insulated flexible pipe, it intensifies the sampling of fluid from the annulus, and not the sampling probe. However, existing methods of sampling and sampling tools may not be suitable for varieties of oil, having a viscosity of more than 1000 SP.

Because the sources of oil containing light hydrocarbons, with time dwindling, the attention of the oil companies now attracts heavy oil. The viability of developing a new reservoir of heavy oil depends on the change of oil viscosity with temperature change. This property of the fluid is different for different types of heavy crude oil, and, as a rule, measured on a sample of the fluid in the laboratory. This measurement is required to build the model of financing the development of heavy oil, because the generation of the required amount of heat to create a flow absorbs the major part of the cost of production. This, in turn, creates in this is blasti technology the need to obtain samples of heavy oil from the reservoir. Obtaining this sample itself requires heat, because without it, the oil will not flow, which means that the sampling of heavy oil requires heating at the place of work.

While it is possible to heat the part of the collector, for example, by using conductive flexible pipe, and then take a sample from this area using a sampling device, this process is not easy, because it is impossible to draw enough power through cables. More energy, calculated the amount of heat per hour, we can summarize and pumped very hot the fluid. However, the injection of heated oil from the surface down plain pipe for the supply of heat is a viable option, because the fluids to be heated on the surface, lose most of their heat due to heat transfer to the moment when they reach the region of sampling, which may be recessed into the wellbore at a thousand meters. In this regard, this technology has not yet satisfied the need in the way of heat supply to the conduit segment of heavy oil in the region of the collector, where it is desirable to take a sample simultaneously with the deployment of the sampling tool in the same area, and in fact - the need for sampling of the manifold with the device or its parts, ispolzuemogo heat in the area of interest of the collector. It would also be preferable to achieve this while pumping fluid reservoir to the surface.

Summary of the invention

In accordance with the present invention, the described methods and systems for sampling the composition of the heavy oil from the reservoir, the carrier composition of heavy oil, involving the installation to completion, insulated pipe, the heated fluid and all downhole sampling tool. The methods and systems according to the invention are intended for sampling from the production well, from which the removed mud, in which there is no mud cake, and the pressure in the wellbore is less than the pressure in the reservoir. Sample tools used in the implementation of methods and systems according to the invention, are not probing the sampling instruments used mainly for sampling from the newly drilled wells, and all instruments for sampling fluid, enhanced by supplying heat through insulated flexible pipe, which is absent in the probe sampling instruments. In the sense in which it is used in this description, the term "composition of heavy oil" means a composition, at least part of which is heavy oil is. The term "heavy oil" may have different semantic content, and this application should not be regarded as limited to any particular definition. In one published set of definitions include those represented by the "Information Center on oil and tar Sands" at the United Nations, which defines bitumen as oil, having a viscosity of more than 10,000 centipoise (CP), with oil having a viscosity of less than 10000 CPS and a density between 10° American petroleum Institute (API) and 20(ANI, is defined as heavy oil and extra heavy oil has a density of less than 10° API. Although the methods and systems according to this application is applicable to bitumen, heavy oil and extra heavy oil by accepting these definitions, the term "heavy oil" in the sense in which it is used in this description, includes compositions containing one or more of these factions, unless otherwise noted. Generally speaking, the methods and systems according to the invention can be used to obtain samples having a viscosity of 1000 SP or more.

The composition of the heavy oil may contain compounds, including - but not in a restrictive sense - hydrocarbons (including sulphurous hydrocarbons, which may include hydrogen sulfide, mercaptans and other sulfur-containing compounds), water, organic and/or inorganic solid particles, and may include micelles, macromolecule, globule, resins, asphaltenes, fluids in the hydrocarbon and water based drilling muds, fluids gap, etc. that have multiple phases (solids and liquid). Samples of the heavy oil, selected using methods and systems according to the invention may contain one or more components of each phase. In other words, the composition of the heavy oil may contain one or more liquid phases, one or more phases of solid particles and one or more gas phase. Alternatively, depending on the sample tool sample tool can separate gases from parts liquid.

One aspect of the invention are methods of sampling of the composition of heavy oil, one way is that you are doing the circulation of heated fluid in the first region of the collector, where present, or is present composition of heavy oil using a pump located on the surface, and installation to completion, containing the downhole pump and sampling tool, within the time and at a flow rate sufficient to obtain a fluid composition of heavy oil, and takes samples of the composition flowing heavy oil using sampling the tools.

Some embodiments of the methods according to the invention can be that come with the installation for completion in the well bore near the first section of the reservoir of heavy oil, however, the installation contains uninsulated pipe, downhole pump connected to the end of the uninsulated pipe, and the loop pipe is inserted through the loop pipe insulated flexible pipe, the distal end of which is attached to the sampling tool, pump the heated non-volatile oil isolated flexible tube in the first section of the reservoir using a pump located on the surface, extract at least part of the heated non-volatile oil to the surface using borehole pump up until the first section of the collector will not begin to flow the heated heavy oil, stop the pump, located on the surface, thereby stopping the injection of the heated non-volatile oil, and at the same time supporting the appropriation of using a downhole pump, and takes samples of heavy oil using the sampling tool.

Methods in the framework of the claims of the invention include those involving the introduction of a tube, such as a sand plug in the wellbore near the first region in such a way that is possible is ity sampling from one or more other sections of the collector, situated or located above the first region.

Other methods according to the invention provide an analysis of the viscosity of the composition of heavy oil, the sampling which is carried out, and the stages of circulation, sampling and analysis can be repeated for one or more other areas of the reservoir. Another way according to the invention provide for the construction of the model of financing the production of the composition of heavy oil from a reservoir using at least the results of the analysis of viscosity. Sampling the composition of the heavy oil can be synchronized with the pump off, located on the surface, or you can specify points or intervals of sampling in accordance with the timer.

The methods according to the invention can provide a temperature measurement in a time-dependent on the sampling tool and, optionally, check the dependence of the temperature on the time when sampling. This can be the measurement with the aid of memory, powered by the battery. Possible methods according to the invention include sampling from the same region of the wellbore at different temperatures for the regulation of temperature by the injected hot fluid. To make changing the temperature of the fluid heated fluid flowing through insulated flexible Tr is the be and thus, in the region where the sampling, you can use the heater, located on the surface. This provides a measurement of the parameters of the oil produced from the reservoir, depending on different temperatures, and this sampling with changing temperatures can be repeated at different depths or in different areas of the reservoir. Thus, the methods according to the invention can be used for sampling in the extraction of heavy oil, depending on the temperature and depth in the reservoir.

Another aspect of the invention is a system for implementing methods according to the invention.

The methods and systems according to the invention will become clearer upon consideration of the following detailed description of the invention and claims.

Brief description of drawings

A more detailed description of the invention below with reference to the accompanying drawings, which depict the following:

figure 1 depicts the diagram of a variant of one system and method according to the invention;

figure 2 - schematic side view of the Y-shaped tool used in the methods and systems according to the invention;

figure 3 is a partial cross - section of known logging tube used in the methods and systems according to the invention in the case of deployment in the bypass pipe in the Y-shaped tool, such as from brazenly figure 2;

4 is a cross-section of the inner sealing mechanism of the hoist tube according to figure 3;

figa, 5B, 5C, 5D illustrate cross-sections known sampling tool used in the methods and systems according to the invention;

figa, 6B, 6C and 6D is a cross-section of a known system for transportation of samples used in the methods and systems according to the invention;

7 and 8 is a cross section of two embodiments of the known flexible pipes and used in methods and systems according to the invention.

However, it should be noted that the accompanying drawings are made not to scale and illustrate only typical embodiments of this invention, and therefore should not be considered limiting of its scope, for the invention may admit to other equally effective ways of implementation.

Detailed description

In the following description, numerous details that give an idea of the present invention. However, specialists in the art will understand that the practical implementation of the present invention is possible without these details and that numerous possible changes and modifications in comparison with the described variants of implementation. The term "collector" may include hydrocarbon deposits, access by one or n is how many wells. The term "borehole" includes cased, cemented or not lined trunks wells, and may relate to the well of any type, including, but not restrictively, productive, well, unproductive hole, the pilot hole, drilling hole, etc. Trunks wells may be vertical, horizontal, passing any angle between vertical and horizontal, deviated or not deviating, as well as any combination of these options, for example, possible vertical well with a non-vertical component. The phrase "under conditions of high temperature, high pressure" means any condition of temperature and pressure, when the pressure is above atmospheric, and the temperature is above 20°C.

The pressure in the reservoir of heavy oil is usually low, often less than hydrostatic. This means that heavy oil, even heated to reduce the viscosity, will not flow by gravity to the surface. Therefore, the heavy oil reservoirs need mechanized operating system. Accordingly, the methods and systems according to the invention, determining the application of heat to the manifold when sampling compatible with this mechanized operating system.

It is known that the technology to rise in the well and although the NGOs provide access to the manifold, provides for the use of the bypass pipe, called Y-shaped tool, from whose branches deployed downhole pump, which is either electric submersible pump (APN)or pump with the expandable cavities (APCS). In accordance with its current purpose, this air tube provides a passage of non-insulated flexible pipe to the manifold. This tube can be used to pump fluid, such as water, stimulating fluids, such as acids and fluids to isolate aquifers, such as gels and cement mortar. However, to inject the heated fluid medium through a non-insulated flexible pipe is impractical because of conductive flexible pipe removes most of the heat from the fluid before it reaches the collector. The methods and systems according to the invention is aimed at overcoming this drawback.

The system according to the invention contain the installation to completion, and the methods according to the invention provide for the installation location for completion in the wellbore prior to sampling the composition of the heavy oil in the reservoir. In the sense in which they are used in this description, the terms "installation for completion and unit completions" are used in the meaning of nouns (describe what their equipment), except in those cases when we are talking about transaction completion. Within the scope of the claims of the invention, the installation for completion include, but are not in a restrictive sense, set for completion cased wells, the installation of the completion of the mixed wells, installation to completion with a flexible pipe installation for completion dvuhmestnyh wells, installation of the completion of the high-temperature wells, pressure installation to completion with the aim of simultaneous development of several productive strata, installation for the completion of naturally flowing wells, installation of well completion, equipped mechanized operating systems, setup for partial completion, set for completion of the major wells, installation to completion without the use of tubing, etc. in Addition, one or more of the basic components for completion may consist of one or more of the described iron-based alloys. In the sense in which it is used in this description, the phrase "the main components of the installation to completion" includes the main elements of an oil or gas well, which includes the column tubing, and et the elements guaranteed what specific type of installation design to completion will operate in accordance with its purpose. The main components of the unit for completion depends on the type of installation to completion, for example, it can be the nodes of the pump and motor installation completion, containing an electric submersible pump.

1 schematically shows a simple downhole sampling tool connected to the downhole or distal end of the flexible tube 14, just below the point C circulation. Each depth of sampling, starting, for example, from the bottom of the barrel vertical wells, the heated fluid medium, such as heated light oil, is circulated down insulated pipe 14 and is pumped to the surface of the downhole pump (not shown) for non-insulated pipe, as shown by the arrows. The feed speed of the pump, located on the surface and the downhole pump is adjusted to maintain the differential pressure at the pumping and reservoir into the wellbore. After a few hours (or days) of the manifold next to the insulated flexible pipe will heat up. Part of the composition of the heated heavy oil, near the distal end tubes 14, will begin to flow by gravity. The composition is heated heavy oil is mixed with the lighter heated oil, and both are pumped to the surface of the borehole is the ASAS. The downhole pump will continue pumping when from the reservoir will flow only heavy oil. In some embodiments, the implementation of the methods according to the invention, immediately after the pump located on the surface, ceases to pump heated the fluid down an isolated Bay in the ideal case should be a short pause before sampling. Immediately after sampling, the tube 14 should be removed from the well as quickly as possible, starting the re-injection of the heated fluid at the point C circulation. This is necessary in order to avoid getting stuck insulated pipes and sampling tool in the wellbore, which will be full of heated heavy oil, growing to the consistency of the resin when cooled. Also, it may be desirable to train technical staff in relevant procedures, taking into account the fact that subsequent runs of the sampling will have to spend at a rate greater than the cooling rate of the well. Otherwise, re-introduction into the well may be impossible, due to the fact that it "freezes" the column of resin.

Possible downhole sampling tools for use in the methods and systems according to the invention are those which are compatible with Y-shaped tool, such as the one shown in figure 2, and can pitt is between the battery and contain control the clock. Such powered battery operated clock sampling tools for production and injection wells are used in some embodiments of the invention when synchronizing an end to the circulation of heated fluid and sample fluid heavy oil. The flow rate of the composition is heated heavy oil will rapidly decrease with decreasing volume of the heated heavy oil. Therefore, soon after the cessation of circulation of a heated fluid medium from the surface, downhole sampling tool will be activated (or someactivity, if there is a timer) to work. This can be achieved by synchronizing switch off the pump located on the surface, with clocks that control the downhole sampler. This sampling operation can be repeated at certain intervals up the wellbore. Downhole sampling tools used in the methods and systems according to the invention are sampling tools with a diameter of 2 inches (5 cm) (or less) and take a sample of fluid from the annulus around them. The possible selections for the implementation of the no probe, pump, etc. present in more complex downhole sampling tools. In some embodiments, the implementation of the tool is just postultimate and the valve, which is opened by the command of hours, and the entire tool is small enough to pass through the Y-shaped tool, and in the preferred embodiment is an isolated Bay with a diameter of 2 inches (5 cm). One example is the tool known under the trade name of the .pst file from company Schlumberger is a logging tool for production and injection wells.

As mentioned earlier, the methods and systems according to the invention can provide a temperature measurement depending on time probatorio tool, this tool or inside it, and selectively registration depending on the temperature from the time when sampling. This can be the measurement using is made as a unit with the sampling tool measuring subunit memory, powered by the battery. Possible methods according to the invention include sampling from the same region of the wellbore at different temperatures for the regulation of temperature by the injected hot fluid. For varying the temperature of the fluid heated fluid flowing through insulated flexible pipe, and thus, in the region where the sampling, you can use the heater, located on the surface. This provides a measurement of parameters of oil, dobyvaemaya collector, depending on different temperatures, and this sampling with changing temperatures can be repeated at different depths or in different areas of the reservoir. Thus, the methods according to the invention can be used for sampling in the extraction of heavy oil, depending on the temperature and depth in the reservoir.

To ensure the flow of only the heated composition of heavy oil, the top and front of the downhole sampler can be installed in the wellbore tube, for example, sandy tube (figure 1). This tube is to isolate the wellbore below the sampler and will prevent any residual flux composition of heavy oil from a previously heated deeper collector located in the sampler. These plugs can be installed and removed using insulated flexible pipe 14.

Heated fluids used in the invention, operate, bringing heat in the reservoir, from which to obtain samples of the composition of heavy oil. The heated fluid medium can be selected from gases, vapors, liquids, and combinations thereof, and can be selected from water, organic chemicals, inorganic chemicals and their mixtures. In some embodiments, the implementation of the heated fluid medium is a non-volatile light oil or combination of types of non-volatile light oil. Its HDMI is required largely depends on the specific pressures and temperatures, required to obtain a fluid composition of heavy oil. The composition of the heated fluid also depends on the ability of the pumps located at the surface and in the borehole, pumping the heated fluid environment. As is known fluids reservoirs often contain suspended particles under conditions of high pressure and high temperature. The particles may be present in the form of a phase of the second fluid (oil or water based) or in the form of solids (organic or inorganic). The presence of these particles is related with the behavior of the oil phases of the fluid, and therefore the nature and/or composition of these particles, which can change with changes in pressure, temperature and composition in General. In order to achieve a better understanding of the phase behavior of particles, it is desirable to obtain samples of suspended particles under certain conditions of pressure and temperature for further characterization through the analysis. The composition of the heated fluid may be selected with these considerations in mind. Fluids used in the invention for heating and circulation in the implementation of methods and systems according to the invention include organic and inorganic liquids, and combinations thereof. In the ideal case, they are non-volatile, non-flammable liquid, though it is not a hard limit is observed. More stringent limitation may lie in the fact that the selected fluid did not cause significant harm to the reservoir from which the sample. Suitable organic liquids can be selected from aliphatic and aromatic compounds, or mixtures thereof. Aliphatic compounds may have the usual chain and/or branched chain, or may be cyclic, having from 1 to about 20 carbon atoms. Examples of hydrocarbons with conventional circuits may include n-hexane, n-heptane, etc. Examples of suitable hydrocarbons with branched chains can include isooctane and the like, and suitable cyclic hydrocarbons include cyclohexane, etc. Suitable aromatic hydrocarbons may include benzene, toluene, xylene (ortho-, meta - and para -), etc. Can be used lacquer gasoline of various types, for example, odorless lacquer gasoline. A typical composition of gasoline lacquer is: which is the aliphatic solvent hexane having a minimum aromatic content of 0.1 vol.%, is the Kauri-butanol sample of 29, an initial boiling point of 149°F (65°C), the end of the boil at approximately 156°F (69°C) and the specific gravity of 0.7 g/cm2. In the European Community composition varnish gasoline dictated by article 11(2) of Directive 2002/96/EC (Directive of the European Parliament and of the Council of 27 January 2003 on the OTF is the restraint of the use of certain hazardous substances in electrical and electronic equipment (WEEE)). You can use various water-glycol solutions, such as a mixture of water and ethylene glycol, used in cars and trucks, if the collector may permit such compositions.

One set of compositions that can be used in methods and systems according to the invention described in the patent application U.S. No. 11/426359, filed June 26, 2006 (69.5706), owned by the assignee of this invention and are incorporated in this description by reference. The described compositions include a solvent asphaltenes and a viscosity reducing agent, and these solvent asphaltenes and a viscosity reducing agent are present in such proportions that substantially reduce the viscosity aspectenonderzoek material (for example, varieties of heavy oil, bitumen and the like), and thus, in essence, prevents the precipitation of asphaltenes either in the manifold or tubing pipe, or in both these places, when mixing or implemented differently contact with spaltenstein material. In some embodiments, the implementation of a viscosity reducing agent may be vaporous or gaseous hydrocarbon (at room temperature and pressure), and the solvent asphaltenes may contain toluene or the equivalent of toluene. These compositions may have a large molar volume in the collector eye is about 5 MPa and 293 K) to minimize the effects of gravity on the flow of diluted heavy oil and can only exist in the vapor phase or in the supercritical state under conditions of a header and/or when the pressure or temperature discharge and can have a high vapor pressure and ambient temperature (at least as high as isooctane) to ensure the recycling of the composition of the extracted oil simply by reducing the pressure, optionally with addition of heat. The solvent asphaltenes and a viscosity reducing agent are at least partially miscible at temperatures above about 273 K. the Solvent asphaltenes and a viscosity reducing agent may be present in the volume or molar ratio in the range from about 100:1 to about 1:100, or from about 10:1 to about 1:10. A viscosity reducing agent selected from a normal, branched and cyclic alkanes having from 1 to about 20 carbon atoms, monoalkenes having from 1 to about 20 carbon atoms, carbon dioxide, pyrrolidones, such as n-methyl-2-pyrrolidone and combinations thereof. Some useful a viscosity reducing agents can be characterized as paraffin. Some of the options for implementation may include the presence of n-alkanes having from about 3 to about 8 carbon atoms, such as propane. In some embodiments, the implementation, you can use chemicals that reduce the hydraulic resistance, such as native and synthetic surfactants, and the definition of "own" this is ntext refers to chemicals present in the raw heavy oil or bitumen. Surfactants can be chosen from anionic, cationogenic, amphoteric surfactants, and combinations of two or more such substances. The examples below. The solvent asphaltenes can be selected from compositions containing benzene and compounds benzene derivatives, in the framework of the General formula (1), and their salts and mixtures:

where R1-R6, inclusive, are radicals independently selected from hydrogen, hydroxyl, halogen, nitrate, amine, sulfate, carboxyl, amide and the like, linear and branched alkylsulfate, aromatic, cyclic, alkalinic, kalkilya substituents or mixtures thereof; and where each R group may contain from 1 to 30 carbon atoms. Examples include toluene, and equivalents of toluene, such as benzene, xylene (ortho-, meta - and para-), styrene, methylbenzol and mixtures thereof. In the sense in which it is used in this description, the term "derivatives of benzene" means compounds having from one to six substituents attached to the Central part of the molecule of benzene. Can also be polycyclic aromatic hydrocarbons, such as naphthalene, anthracene and phenanthrene. Useful solvents for asphaltenes can also be natural and/or synthetic the malls, resinous aromatic compounds, etc.

Installation for well completions used in the implementation of the methods and systems according to the invention, contain isolated or "normal" pipe (with links or without them), passing from the surface in the region or regions of the reservoir where it is desirable to take samples, and Y-shaped tool, one branch of which is suspended downhole pump and air pipe. Each of these features is discussed further below, as appropriate pumps located at the surface and downhole samplers.

Figure 2 shows a Y-shaped tool used in carrying out the invention, and the accompanying air pipe and downhole pump. Shown tubing 70, transitional knee 2 tubing, transport sub 8 and a Y-shaped tool 6. In the right side of figure 2 shows the sub pump 50, the discharge head 52 of the pump outlet pressure inlet channel 54 of the pump, borehole pump 56 (in this drawing - model ESPCP S20F170 from Schlumberger company), the adapter 58 of the pump rotor, the inlet 60 of the pump, the safety device 62 of the pump, the motor 64, block 66 sensors and the connecting nipple 68. Also shown working device 72, known as the “Teleswivel” (relevantly), air pipe 74 and guide the traveler 76 to re-enter.

Air pipe 74 suspended from the Y-piece tool 6 has such dimensions that its inner diameter or channel is large enough, so that the tool can be placed is shown in figure 1 insulated flexible pipe 14 having a smaller diameter, for example, insulated flexible tube having an outer diameter of 2 inches (5 cm). The outer diameter of the insulated pipe is such that it can move in the longitudinal direction through the loop pipe, if required. Although you can use a single non-insulated pipe, as well as single insulated tube, it is not a mandatory feature. For example, depending on the local supply pipe and a schematic of the well profile, you can use several sections of uninsulated pipes and insulated flexible pipes for sampling from different areas of the collector.

Formerly known logging tube tube, collapsible at Bay, for a Y-shaped tools were based on narrow gap in a bronze bushing to provide dynamic hydraulic seal. However, the irregular geometry of the flexible pipe, due to ovality and wear this pipe, and the limited length of the seal due to restrictions on the length of the tube, creating considerable size leakage path for recirculation of the pumped fluid. In squarings large flow rate, exceed 1500-2000 m3/day allowable leakage 600-800 m3because it still achieved good results without overheating the electric submersible pump. Thus, for wells with large flow rate of this design with a bronze bushing was enough in the stages of completion, where the majority of underlying events in the world of logging operations by means of Y-shaped tools, containing a flexible pipe. However, in wells with low flow rate all fluid will be recirculated, and it makes a graph of the results of geophysical research, invalid and leads to overheating APN. To solve this problem, we developed a new tube design, described in the possession of the holder of the rights to this proposal published U.S. patent application No. 20050279494 called "Logging tube with monolithic internal seal", included in the description by reference. This was a serious engineering problem because the wall thickness of the tube available for the implementation of an improved seal is limited to relatively large flexible pipe and a small bypass pipe. To achieve the target depth long horizontal wells, some collectors are required Bay with a diameter of 2 inches (5 cm). The idea was to consider g bcou tube as the piston and to ensure the availability of flexible sealing mechanism. During difficult trials in open court, the tube was condensed over 6000 feet (1830 m) of movement of the flexible pipe with a diameter of 2 inches (5 cm) at varying speeds and pressures. New tube guarantees numerous flights logging in wells with low flow.

Figure 3 presents a partial cross-section of known logging tube used to implement the methods and systems according to the invention in the case of deployment in the bypass pipe 74 Y-shaped tool, such as shown in figure 2, and figure 4 presents the cross-section of the inner sealing mechanism of the hoist tube according to figure 3. Figure 3 shows the logging tube 10 that is disclosed in the published patent application No. 20050279494 used in the present invention, is placed in the bypass pipe 74 into the wellbore (not shown) and having insulated flexible pipe 14, to conduct sampling in the reservoir when the implementation of the present invention. Logging tube 10 includes a top sub 16, the inner sealing the casing 18 and located between the inner seal Assembly 20 to create a seal between the insulated flexible pipe 14 and the internal channel of the sealing cover 18. Logging tube 10 also includes an outer seal Assembly 22 to create a seal between the outer surface is part of a logging tube and channel bypass pipe 74. The outer seal Assembly 22 consists of a number of annular seals 24 V-shaped cross-section known in the art, and supported on the inner bottom of the sealing cover 26. In the bottom surface of the outer sealing cover 26 rests against the cylindrical spring 28, which rests in the inner sleeve 30 to its opposite end. A cylindrical spring 28 is enclosed within the support ring 32, which is installed between the outer sealing cover 26 and the inner sleeve 30. The lower body 34 logging tube 10 surrounds the inner sleeve 30 and extends to the bottom of the sub 36, which has cut off the finger 38. Cut off the finger 38 secures the bottom sub 36 to lock the sleeve 40 until then, until the start of the destruction of insulated flexible pipe 14 of the bypass pipe 74 when the operation is complete sampling. In the space 44 to the bottom of the pipe 14, the inside of the hoist tube 10 is connected transitional knee 42, which supports the downhole sampling tool 42 at its downhole end (for a more detailed explanation of this tool is described in the description accompanying figa-5D). In the beginning of the operation of the sampling logging tube 10 located on an isolated flexible tube 14, is placed on the polished nipple in the channel of the bypass pipe 74. The outer ring TP is of 24 V-shaped section, contacting the channel bypass pipe 74, prevents the passage of fluid to the borehole around the outer surface of the logging tube 10. After this deployment isolated tube 14 to be collapsed into the Bay, continues as it passes through the channel logging tube 10, which is now fixed inside the bypass pipe 74. The inner seal Assembly 20, more described in connection with figure 4, ensures that at any point in time between insulated pipe 14 to be collapsed into the Bay, and logging channel tube 10 there is a monolithic seal, preventing the recirculation of the fluid in the loop pipe 74 this path during operations with the tube to be collapsed into the Bay.

In figure 4 the inner seal Assembly 20, shown in figure 3, shown in cross-section, and in it insulated flexible pipe 14 is not shown. The inner seal Assembly 20 includes an upper annular seal 21, the upper end seal 23, the Central o-ring seal 25, the lower end of the seal 27 and the lower o-ring seal 29. In addition to its sealing function, each o-ring seal 21, 25, 29 helps to stop adjacent roof seal (adjacent roof seals), acts as a barrier to debris and serves as a bearing for moving through h the th insulated flexible pipe. O-ring seals 21, 25, 29 made of a material with a low coefficient of friction, such as PEEK. Roof seal 23, 27 are self-acting and resistant to extrusion. Each end seal 23, 27 contains an elastomeric ring 23A, 27A round cross-section, is surrounded by the channel seal cap ring 23C, 27B. Rings 23A, 27A round cross-section is made, for example, from a fluoroelastomer made, and roof ring 23C, 27B made of polytetrafluoroethylene (PTFE) top grade, such as Avalon 89. Because the rings 23A, 27A circular cross-section made from a fluoroelastomer made, they are actively working on roof seals 23, 27, creating a good contact between the end rings 23C, 27B and insulated flexible pipe 14 at any time and irrespective of any residual bend in the flexible tube, or the distortion of the cross section. It should be noted that each of the end seals 23, 27 may contain more than one ring 23A, 27A round cross-section, when you want the flexibility of the seal was still more.

You can use a heat generator located on the surface, and a pump located on the surface for pumping the heated fluid down insulated flexible pipe, immediately after she will be on her place in the bypass t is the UBA unit for completion. For these purposes you can use any pump and a heat generator located on the surface. Pumps located at the surface, such as a horizontal pumping system (STS), typically include a source of motion, which can be a motor, turbine, diesel or not the diesel internal combustion engine, generator, etc., in some cases combined with a protective device, compacted camera and the like, and a pump mounted on the horizontal rails. Horizontal pumping system can be used in the present invention for pumping the heated fluid in the collector region, of which it is desirable to take one or more samples. As explained in U.S. patent No. 6425735, owned by the assignee of the present invention, the motor can be flexibly articulated with horizontal rails on intended for motor mounting surface of the horizontal rails. The pump can be articulated with horizontal slide through the installation site, which may include a support (for example, a fixed support) and terminal nodes. The pump can be put with the possibility of the drive motor through the bearing. Alternatively, the support may be an external node of the socket configuration that delivers podsoednineny the nozzle of the pump, such as one of the two nozzles of the pump, projecting from the pump.

The downhole pump may be selected from any well pumps that are compatible with the heated fluid environments and Y-shaped tool, with the definition of "hot" in this case covers any temperature above 150°F (65°C). An example of such a pump is the one known under the trade name “Hotline ESP” and comes firm Schlumberger. The downhole pump may be a piston pump or a centrifugal pump. Suitable piston pumps include pumps with expandable cavities (APCS), such as pump model ESPCP S20F170 discussed in connection with figure 2. You can use other APCS, such as those known under various trade names, such as “15 TP 600 SL”, “30 TP 650 SL”, “80 TP 400 SL” and “1000 TP 200 SL”, and which supplies the company Kudu Industries Inc., Calgary, Alberta, Canada. When the rotation speed of the motor 500 rpm and zero pressure, the performance of these APCS are, respectively, 15, 27, 90 and 1000 m3/day. The downhole pump may be an electric submersible pump (APN), such as known under the trade name Axia™ pumping system from Schlumberger Technology Corporation or its modifications. Pumps of this type can have a simplified two-component configuration of the pump - motor", including the impact of the pump, having one or more steps inside, and the combined motor and protective device. The pump can be integrated as a single unit inlet and outlet heads. Fewer mechanical connections can contribute to fast-track installation and increased reliability of these APN. United motor Assembly and protective devices, known under the trade name ProMotor™can be pre-filled regulated environment and may include performed with him as a whole a device for measuring temperature and pressure in the well. An alternative configuration of electric submersible pumps that can be applied in the implementation of methods and systems according to the invention, include APN deployed on the cable, and APN deployed on coiled tubing, power cable, bonded to the outer surface of the flexible tube (this tube acts as a "production environment"). For example, three located on top of the engine can drive three-speed pump, and all stages of the pump are enclosed in the housing. The number of stages of the pump three-speed pump can be identical operating parameters, and some speed pump can have different operating parameters. It is possible to provide a separate protective device and octanal is maintained by selection pressure sensor or temperature, in-depth safety valve and the hollow spindle for injection of chemicals. Technology downhole inlet APN (with an electric motor, located at the top) has been developed over a number of years. It's important to properly set the speed of the pump motors and protective agent in the flexible pipe, ensuring that the smaller the duration of the installation and extraction along with the protection of cables and the possibility of lowering the existing well and rise from it.

Collection and sampling of underground fluid contained in underground strata, are well known. For example, in the industry of exploration and production of oil samples of the reservoir fluid is collected and analyzed in a variety of ways, for example, to determine the presence, composition and productivity of underground reservoirs of hydrocarbon fluid. This aspect of the process of exploration and mining may be fundamental in the development of exploration strategies and influences important financial costs and cost savings. Examples of downhole sampling tools are described in U.S. patents№№4860581, 4936139, 6223822, 6457544, 6668924, as well as in published U.S. patent applications No. 20050082059, 20050279499 and 20060175053, all of which are assigned to the assignee of the present invention. Proposed and various other methods and devices for obtaining samples of underground fluid CPE is. For example, in U.S. patent No. 6230557 (Ciglenec and others), U.S. patent No. 6223822 (Jones), U.S. patent No. 4416152 (Wilson), U.S. patent No. 3611799 (Davis) and publication no WO 96/30628 international patent application designed some probes and related methods of improving sampling. Other methods developed for the separation of clean fluid during sampling. For example, in U.S. patent No. 6302959 (Hrametz and others) described the sampling probe with two hydraulic lines for extraction of formation fluid from two zones in the wellbore. The fluid environment of the wellbore are absorbed into the guarded area separate from the fluid that is absorbed in the area of the probe. Despite advances in sampling, the need to develop methods of sampling fluid compositions of heavy oil is stored.

On figa, 5B, 5C, 5D illustrate four stages of the round downhole sampling device 80 used in the methods and systems according to the invention. This particular sampling device known under the trade name "Sampler for single-phase collector" (SRS) from Schlumberger company, but you can also use other equivalent samplers. Sampling device 80 can be used in conjunction with block 102 of the transfer under field conditions imposed on the choice of shirt heat and bottle 103 for single-phase samples, which is in this description considered in connection with figa-6D. The sampling tool 80 type PGEC is a downhole sampling tool with pressure compensation and can work in columns, containing up to 8 instruments on a smooth rod, power lines, pipe, roll in the Bay, sucker rods or the media (SCAR-A) ligaments. Each instrument has its own clock 82 that provides increased versatility in the process of making decisions about when and to what depth wells individual tools in the convoy must take a sample. The sampling tool type PGEC designed for a working pressure of 15,000 pounds-force per square inch (lb-s/CVD) (103 MPa), the test pressure 22500 lb-s/CVD (155 MPa) and a temperature of 400°F (204°C).

For sampling in accordance with methods and systems, the tool 80 is fixed to the distal end of insulated flexible pipe and is transported down the well through the loop pipe 74 Y-shaped tool. Each tool independently switches to the capture sample or clock 82, triggered by high temperature, which can be a mechanical watch with a delay of up to 12 hours, or electronic clocks for long operations take up to several weeks. Alternatively, can trigger the rupture disk when the tool 80 moves in the media (SCAR-A) about the s as part of the column downhole sampling tools and activates the apply pressure of the annulus. The sampling tool includes a main body 81, an air chamber 84, valve 86, the capping device 87, the camera for the buffer fluid 88 and sampling holes 90. The sampling tool 80 also contains a floating piston 91, the chamber filled with the fluid medium 92, pressure compensating, disc separator 94 and another chamber 96, filled with nitrogen or another inert gas. This version of the downhole sampling tool complete fixed piston 93 and the spool valve 95.

At startup, the sampling tool 80 extracts a sample of 600 cm3due to the controlled movement of the fluid reservoir, representing the heated heavy oil, this fluid manifold acts on the floating piston 91 in the chamber for sampling. The entire sampling process takes approximately five minutes and shows four stages in figa (location while moving), 5V (start sampling), 5C (completion of sampling and closing the camera samples) and 5D (pressure compensation). Nitrogen is pumped to the surface, causing the filling fluid medium, compensating the pressure at the closed sampling holes 90. Mechanical or electrical clock 82 set the time of opening of the regulating valve 86. At the beginning of sampling, control valve 86 opens hours and 82. The buffer fluid 88 is held in the air chamber 94, and a floating piston 91 is moved due to the introduction of the fluid, i.e. the heated heavy oil reservoir. Upon completion of selection of the sample chamber is filled with samples heated heavy oil. Floating piston 91 affects capping device 87 and the fixed piston 93 is moved into the chamber for samples, isolating the sample NTN. Mechanical locking capping device 87 ensures that the re-opening of the holes 90 of the sampling tool is not going to happen. Upon completion of closure, the spool valve 95 is opened, releasing the fluid 92, a compensating pressure. When the tool is extracted using a conventional (non-isolated) flexible pipe, the temperature generally should fall, and the sample should be reduced. However, this can be minimized by re-initiating the flow of heated fluid through the insulated flexible pipe used in the present invention. Using the fluid 92, compensating the pressure in the sample is supported by a pre-set pressure. Pre-set pressure is determined by the discharge pressure of the nitrogen prior to work beginning sampling.

After the successful capture of a sample chamber of the sample present in the sample instrument is blocked and mechanically and hydraulically. Have a look at the sample is maintained at a pressure manifold, or pressure greater than the reservoir pressure, by issuing a predetermined portion of the nitrogen. The nitrogen in the chamber 96 acts like a spring on a sample heated heavy oil by a floating piston 91, acting on the buffer fluid environment 88, which may be a synthetic oil, which avoids contamination of the sample heated heavy oil with nitrogen. Pressure extraction usually ask for a few thousand pounds force per square inch (or hundreds of MPa) is higher than the pressure at the initial boiling point, or - in the case studies of asphaltenes is greater than the reservoir pressure.

The effect of sampling instruments based on elastomeric seals between the sample and the atmosphere, and therefore is not ideal for long-term storage or transportation of the samples. Therefore, when the sampling tool is extracted to the surface, the sample is transferred with the maintenance of conditions of formation of the sampling tool in compensating pressure cylinder 103 for samples, as shown in figa-6D. Figa illustrates the initial Assembly, figv illustrates the transfer of the sample, figs illustrates the completion of the transfer, and fig.6D illustrates creating hats nitrogen or other inert gas. Cylinder sample may be a cylinder, known under the trade name "bottle-phase sampling", from the firm Schlumberger, although meet voritelnoy be any bottle samples having a similar design. Preparation of the sampling tool and transfer of samples taken at the location of the wells in the cylinder 103 sample can be performed using a device known under the trade name "the transfer unit in the field indicated by the position 102 and a portable production unit from firm Schlumberger, which has three specialized high-pressure pump for nitrogen, synthetic oils and mixtures of water / glycol. Using the shirt heat (not shown) are possible transfers of samples at temperatures up to the temperature of the collector. The system further includes a reservoir 104 to collect water and glycol, the pressure gauge 109 and the source of N2 nitrogen. The cylinder 103 sample includes the piston 107 and the camera 105 variable volume filled (for example) a solution of glycol in the water.

The minimum size or volume of collected samples is determined by the minimum requirement for samples with specific analytical method selection, in the typical case - viscosity. Some of the currently existing methods of composition analysis require only nanograms of material for a proper analysis, but the viscosity may require much larger samples. Depending on the desired sample volume, may require numerous fees sampling, th is would be to collect enough material for analysis. For these and other reasons, systems and methods according to the invention can be automated. The collected sample may contain phase gas and liquid, supercritical phase and any combination thereof. The sample may be any sample at elevated temperatures and pressures, including - but not in a restrictive sense - compositions containing hydrocarbons (including sulphurous hydrocarbons, which may include hydrogen sulfide, mercaptans and other sulfur-containing compounds), water, organic and/or inorganic solid particles, and may include micelles, macromolecule, globule, resins, asphaltenes, fluids in the hydrocarbon and water based drilling muds, fluids gap, etc. that have multiple phases (solids and liquid).

Recently added insulation flexible pipe. For example, a company called MAJUS in the United Kingdom is developing a flexible pipe, using the technology of underwater pipelines. It is expected that thermal losses for 2000 m length of flexible pipe will be only 5%. With such a specialized flexible pipes will be possible pumping heated fluid without significant heat loss, which gives the opportunity to take the heat at the same time in the manifold and in fluid environment, retrieved from the call the Torah.

As explained in the patent application U.S. No. 20060175053 A1, published August 10, 2006, included in this description by reference and assigned to the company MAJUS, the United Kingdom, there are several options for providing insulation between the two pipes from a number of isolated tubes. 7 shows a cross-section of the flexible pipe 4 and suitable, in particular, to methods and systems according to the invention. The pipe 4 is made by a method which is known under the name "pipe in pipe". This first tube 202 is mechanically secured to the second outer pipe 210 has a larger diameter concentric with the first pipe 202. Between the two pipes placed insulator 220. Very good insulator is a vacuum, however, provided a great length of pipe in question, the compressive stress in the annular space between the pipe and thermal changes that can cause stress buckling in the pipe, make the vacuum insulation unable to guarantee that these two pipes will not come into contact with each other. Such contact could, first, to remove the insulating vacuum between the two pipes and could lead to thermal losses due to conduction is mainly because the pipes are made of metal material. These contacts can be avoided by introducing spacers between 250 DV the two pipes. In the space between the pipes, you can enter the hard insulator 220, which is able to resist destruction and which will act as a seal, preventing contact of the tubes with each other. The material used to manufacture these gaskets must have good insulating properties. Such material can mainly be microporous material. This microporous material may be a material of the type described in U.S. patent No. 6145547 included in this description by reference, mainly get by pressing the powder, for example a mixture containing a large proportion of silica, together with a small proportion of titanium dioxide. Such extruded microporous material mainly has a density in the range between 200 and 400 kg/m3. The insulating properties of this material are significantly improved when it is under low pressure in the annular space between the two pipes. Such low pressure, located primarily in the range between 1 mbar and atmospheric pressure, can be obtained in this case by using a vacuum pump 160 between concentric pipes 202 and 210. Function strip running such microporous material can be realized if it is used to fill the entire space between the two tubes. With that the Ki of view of mechanics, it is possible also uniform placement of gaskets made of microporous material, only for a few centimeters in length along the pipe 4 through the intervals in the range from about 0.1 to about 1 m, which ensures the reinforcement, preventing any destruction of the insulator.

The insulator 220 may also be accomplished by making superinsulator formed reflective shielding sheets 230, between which there are layers of powder 240, and it can be such superisolated as the one described in published patent application U.S. No. 20050100702 included in this description by reference, and is schematically illustrated in Fig. The screens are formed of a reflective sheet, for example, aluminum, which is deposited powder and which is helically wound on itself. Powder 240 may have a grain size distribution is essentially equivalent to the pore size of 40 microns, and the size corresponds to the order of the mean free path of gas molecules, which is a powder, and a density in the range between 50 and 150 kg/m3. In an advantageous embodiment, between these two pipes, insulated pipes, collapsed into the Bay, it is possible to maintain a pressure in the range between 10-2and 1 mbar. It is also possible the manufacture of the insulator 220 by combining the use of the lower multilayer reflective shielding sheets 230 partial vacuum of the order of 10 -2-1 mbar. This insulator ensures productive heating zone to a temperature close to 200°C, which in turn ensures a significant reduction in the viscosity of the composition of heavy oil and thereby ensures acceptable sample.

Insulated flexible pipe is also described in U.S. patent No. 6015015 included in the description by reference. This insulated pipe is, in some embodiments, implementation, continuous composite flexible pipe comprising an inner flexible tube located within the outer flexible tube. Two segments of flexible pipes restrict the annular space, which may be isolated or may contain an insulating material. As noted in the aforementioned patent No. 6015015 and is consistent with the above published patent application No. 20060175053, assigned company MAJUS, it is clear that one means "isolation" is the provision of a vacuum. The vacuum may be of insulating material. Within the ring, separating the pipe, spaced in the longitudinal direction many centralizers. Itself a composite pipe endowed with sufficient flexibility for winding on the drum carried by the truck, and sufficient rigidity for insertion into the channel. During downhole operations, one limitation is usually the size. In the typical case will be the same the consequently, to a composite flexible pipe has fulfilled its function while minimizing the outer diameter of the composite pipe. As mentioned in the patent No. 6015015, for this reason "concentric flexible tubes, in contrast to the eccentric flexible pipes may be more economical and practical design, when you have to use dual flexible pipes. Concentric has additional structural benefits to account for the operations of winding the column dual flexible pipe on the drum. However, it should be understood that isolated dual flexible pipe can operate and if they are not concentric or if the number of "centralizers" are separated from each other, but do not support accurate concentric.

Each segment of the inner tube and the length of the outer tube, which form used flexible pipe may be at least several hundred or several thousand feet or meters. Used pipe, collapsed into the Bay must have sufficient structural integrity, including flexibility and rigidity, for re-winding on the drum and unwinding with him, and also for re-introduction into the wellbore and removing from it, as explained in the aforementioned patent No. 6015015. The annular space between the inner and outer Bay may the be condensed, preventing hydraulic communication with the environment outside of the pipe. The annular space may be sealed to avoid hydraulic communication with the environment outside while ensuring, at least, limited internal hydraulic messages within the annular space. In some embodiments, the implementation used in the above-mentioned patent insulated concentric coiled tubing at one end of the insulated flexible pipe, the length of the inner pipe can be attached to a segment of the outer tube and at the other end of the composite pipe both lines can be connected to the point of continuation. At each end of the section cut inner tube may be sealed or cut the outer tube, or at the point of expansion, which provides a seal with the annular space between these two tubes.

The maximum outer diameter of the outer tube is limited only by the need to ensure that the location of the isolated tube inside the bypass pipe installation for completion. Presumably, the outer diameter of the inner pipe insulated pipe may be in the range of one inch (2.54 cm) to about five inches (12.7 cm), and the outer diameter of the segment of the outer tube may be in the range between two inches (5.1 cm) and is estu inches (15.2 cm). The annular space preferably has a width of about 1/2 inch (about 1.25 cm). The annular space does not necessarily have the same width everywhere. "Isolation" insulated pipes, collapsed in the Bay, can be selected from a vacuum, inert gas, loose particles of aggregate, and in particular fine - particle loose aggregate, for example, fine-grained perlite, passed through a sieve with a suitable cell size (1,19 mm), and combinations thereof.

In the annular space between the inner and outer pipes insulated flexible pipes used in the implementation of methods and systems according to the invention can be present centralizers. Used centralizers provide a hydraulic message in the longitudinal direction through the centralizers. Such a message may be provided by the outer peripheral grooves, which also serve to minimize radial heat conduction. Centralizers preferably contain a split steel ring located between the two pipes at intervals in the range between five and seven feet (1.5 m to 2.1 m), or at intervals of approximately six feet (1.8 m).

Although the above is described in detail only a few possible embodiments of this invention, specialists in the art will easily understand what, in the framework of the new technical features and advantages of this invention may have many changes in possible variants of its implementation. Accordingly, all such modifications are considered to be within the scope of the claims of the invention defined by the following claims.

1. Method of sampling of heavy oil from a reservoir, in which the circulation of heated fluid in the first region of the collector, where it is present or assumed present composition of heavy oil using a pump located on the surface, and installation to completion, containing the downhole pump and sampling tool, within the time and at a flow rate sufficient to obtain a fluid composition of heavy oil, and takes samples of the composition flowing heavy oil using the sampling tool.

2. The method according to claim 1, in which the implementation of the circulation provides the installation location for completion in the well bore near the first region of the collector, while the installation for completion contains uninsulated pipe, downhole pump connected to the end of the uninsulated pipe, and the loop pipe.

3. The method according to claim 2, in which injected insulated flexible pipe through the loop pipe, and remote the local end of the insulated flexible pipe is attached to the sampling tool.

4. The method according to claim 3, in which the heated fluid medium is non-volatile oil, and the implementation of the circulation involves the injection of heated non-volatile oil isolated flexible tube in the first region of the reservoir using a pump located on the surface.

5. The method according to claim 4, in which the implementation of the circulation involves pumping at least part of the heated non-volatile oil to the surface using a downhole pump to start leaking composition heated heavy oil from the first section header.

6. The method according to claim 5, in which stops the pump located on the surface, and thus stop the injection of the heated non-volatile oil and maintain pumping using a downhole pump.

7. The method according to claim 1, wherein introducing the tube into the well bore near the first region after sampling, preventing leakage of the composition of heavy oil is now near the first area.

8. The method according to claim 1, wherein analyzing the viscosity of the fluid composition of heavy oil.

9. The method according to claim 8, in which I repeat the exercise circulation, sampling and analysis in various fields in the header.

10. The method according to claim 9, in which the construction of the model of financing the production of the composition of heavy oil from a reservoir.

11. The method according to claim 1, in which the synchro is serout sampling thus it is immediately after the cessation of circulation.

12. The method according to claim 1, in which the heated fluid medium selected from organic fluid, inorganic fluid, and combinations thereof.

13. The method according to item 12, in which the heated fluid is organic, and choose from varieties of non-volatile light oil or combination of types of non-volatile light oil.

14. The method according to claim 1, in which measure the temperature depending on the time of the sampling tool, this tool or inside it, and selectively record the temperature in relation to time during sampling.

15. The method according to 14, which regulate the temperature of the heavy oil sampling tool, this tool or inside using a heated fluid medium.

16. The method according to clause 15, which regulate the temperature of the heated fluid medium and therefore the temperature of the first region where the sampling, using a heater located on the surface.

17. The method according to clause 16, in which repeated sampling, temperature control and temperature measurement in different areas of the reservoir and the measuring production of recoverable heavy oil depending on temperature and/or depth, or area of the collector.

18. Method of sampling of heavy oil from the reservoir, for localsize is that place installation for completion in the well bore near the first section of the collector of heavy oil, however, the installation for completion contains uninsulated pipe, downhole pump connected to the end of the uninsulated pipe, and the loop pipe is inserted through the loop pipe insulated flexible pipe, the distal end of which is attached to the sampling tool, pump the heated non-volatile oil isolated flexible tube in the first section of the reservoir using a pump located on the surface, extract at least part of the heated non-volatile oil to the surface using a downhole pump to start the flow of heated heavy oil from the first section of the collector, stop the pump located on the surface, thereby stopping the injection of the heated non-volatile oil, and maintain the pumping fluid using a downhole pump, and takes samples of heavy oil using the sampling tool.

19. System for sampling heavy oil from a reservoir containing the installation for completion in the well bore near the first section of the collector of heavy oil, including non-insulated pipe, downhole pump connected to the end of the uninsulated pipe, and the loop t is Ubu, having an inner diameter insulated flexible tube having an outer diameter less than the inner diameter of the bypass pipe, to ensure traffic insulated pipe through the loop pipe, and the distal end of the insulated flexible pipe is attached to a controlled clock and powered by the battery of the sampling tool, and a pump located on the surface to pump the heated non-volatile oil isolated flexible tube in the first region of the collector.

20. The system according to claim 19, in which the downhole pump is a pump with an expandable cavity or electric submersible pump and insulated flexible pipe comprises an inner pipe and outer tubes forming between them an annular space filled with insulating material.



 

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FIELD: petroleum industry.

SUBSTANCE: invention relates to investigations of subsurface samples of fluids and particularly, to taking aliquot subsurface microsamples of formation fluids for conducting in-situ express analysis. The well device contains the sampling tank and several microsampling chambers. Microsampling chambers may have at least one window for input of energy of visible emission, emissions in the near and middle fields of the infrared range and energy of other kinds of electromagnetic emission into the tank for samples collected in the microsampling chamber, in the well or downhole. Such window can be made of sapphire or another material transparent for electromagnetic emission. Besides the whole microsampling chamber can be made of sapphire or other material transparent for electromagnetic emission with a possibility of visual control or analysis of samples in the microsampling chamber. The microsampling chamber makes it possible to immediately analyse a sample obtained in situ, on the surface to determine the quality of the sample contained in the main sampling tank or to make thorough analysis of the same.

EFFECT: increased sampling capacity and express analysis of samples, more accurate determination of the parameters of the sample.

30 cl, 8 dwg

FIELD: mining.

SUBSTANCE: invention relates to determination of various well characteristics in the underground formation, through which the borehole passes. For this purpose a pressure drop is created due to the difference between the internal pressure of fluid that passes through the drilling tools and pressure in the circular space in the borehole. The device contains an extension arm that can be connected with the drilling tools and has an opening that enters into the chamber in the extension arm. A piston is located in the chamber with a rod passing through the opening. The piston can move from the closed position when the rod blocks the opening to the open position when the rod is retracted into the chamber to form a cavity for intake of well fluid. A sensor is located inside the rod, which is intended for data collection from the well fluid contained in the cavity.

EFFECT: increase of accuracy of determination of well characteristics.

34 dwg, 9 dwg

FIELD: method and sensor for gas monitoring in well environment.

SUBSTANCE: method involves providing infrared light-emitting diode in well; transmitting corresponding infrared signals to the first optical path extending from the diode through well gas sample and the second optical path extending from the diode through gas sample; detecting transmitted infrared signals and determining concentration of component in well gas sample from detected signals. The first optical path is free of liquid.

EFFECT: increased accuracy of gas monitoring.

36 cl, 4 ex, 19 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: method includes picking a sample of bed fluid under pressure by means of pump. Sample of fluid is then compressed by moveable piston, actuated by hydrostatic pressure in well through valve. Compressed sample of bed fluid is contained under high pressure inside the chamber with fixed volume for delivery to well surface. Moveable piston is in form of inner and outer bushings, moveable relatively to each other. At the same time several tanks for picking samples from several areas may be lowered into well with minimal time delays. Tanks may be emptied on well surface by evacuation pressure, to constantly provide for keeping of pressure of fluid sample above previously selected pressure.

EFFECT: higher reliability.

6 cl, 14 dwg

FIELD: oil industry.

SUBSTANCE: device has hollow body which is a fragment of force pipeline at vertically placed portion of mouth armature. Tool for controlling flow of multi-component gas-liquid substance is made in form of valve, connected to rotary support. Sample chamber is a ring-shaped hollow in hollow body, placed at same level with valve and connected at inlet to flow of multi-component gas-liquid substance through extracting channels, made on hollow body. Extracting channels are made in form of side slits, positioned symmetrically relatively to valve rotation axis. Ring-shaped hollow on hollow body is connected at outlet to locking tool, mounted at extension of valve shaft and made in form of sample-taking valve. Valve shaft and sample-taking valve are interconnected through hollow intermediate shaft. Sample-taking valve is placed in the body of locking tool with possible reciprocal movement. Valve shaft and hollow intermediate shaft are interconnected with possible mutual rotation for a quarter of one turn.

EFFECT: simplified construction and maintenance, higher quality.

4 dwg

FIELD: oil and gas industry.

SUBSTANCE: device has body in form of calibrated cylinder. From both sides lids are connected to body. Inside the body separating piston and ball for mixing sample are placed. Also provided is hydraulic resistance for slow inlet of sample. Slide valve is used for safe inletting, pressurization and depressurization of taken fluid, is connected to lid and consists of rod with channels and bushing with clamp. Clamp is held between nuts interconnected by threads, one of which is connected to rod by thread. Needle valve consists of locking pin and axle-bearing and is used to drain pressure from closed space above slide valve prior to disconnection of sample-taking container from bed-testing equipment.

EFFECT: simplified construction, higher reliability.

3 dwg

FIELD: oil industry.

SUBSTANCE: device has hollow body mounted in force pipeline, inside of which body tool for controlling flow of multi-component gas-liquid substance is placed, probing chamber with extracting channels, locking tool with handle and guiding pipe, driving valve for picking sample, mounted with possible interaction with spring-loaded rod, placed inside the shaft of flow control tool. Hollow body is a fragment of force pipeline at vertical portion of mouth armature, control tool is made in form of valve of lesser diameter, then inner diameter of hollow body, and probing chamber is a ring-shaped hollow in hollow body, positioned at same level with valve and connected at input to flow of multi-component gas-liquid substance through extraction channels, made symmetrically to rotation axis of valve, and at output - to locking tool, while rod is provided with shelves for multi-start thread of appropriate cross-section, made at shaft on length of no less than quarter of axial step of this thread.

EFFECT: simplified construction, higher efficiency.

3 dwg

FIELD: oil industry.

SUBSTANCE: device has hollow cylindrical body, branch pipes for extraction and output of sample and locking element. Body is made thick-walled. End portions of body are made in form of truncated cone and interconnected, on the side of lesser bases by means of channel. Branch pipe for extraction of sample is made elongated, with length equal to body diameter, and is let through in transverse direction of body through the center of said channel. Within limits of branch pipe cross-section its hollow is separated by slanted solid wall on two portions, each of which is connected thereto. One portion of branch pipe hollow is meant for taking sample, other one - for feeding reagent into well product. To receive trustworthy information about sample, by setting flow to homogenous state, inner surface of cone, on the side of larger base, is provided with rigidly fixed blades for turbulization of flow flowing into body, while diameter of channel connecting cones is selected equal to diameters of their lesser bases.

EFFECT: simplified construction, broader functional capabilities, higher quality of sample.

2 cl, 3 dwg

FIELD: oil industry.

SUBSTANCE: hollow body of device is actually a fragment of force pipeline at mostly vertical portion of mouth armature. Organ for controlling flow of multi-component gas-liquid substance is made in form of valve mounted on shaft having lesser size, than inner diameter of hollow body. Sample chamber is in form of ring-shaped hollow on hollow body, positioned at same level with valve. Ring-shaped hollow is connected at input to flow of multi-component gas-liquid substance through intake channels, positioned symmetrically to valve rotation axis, and at output - with locking organ. Driving screw mounted on body of locking organ is connected to sample-taking valve with possible mutual rotation and combined axial displacement. Sample-taking valve and shaft with valve are mated with possible synchronous rotation around common axis and relative axial displacement. Working organs of device are positioned immediately near main flow of substance taken as sample to provide for lesser dimensions of device and prevented freezing in winter season.

EFFECT: simplified construction, simplified maintenance.

7 dwg

FIELD: oil production industry, particularly methods or devices for cementing, for plugging holes, crevices, or the like.

SUBSTANCE: device comprises inflatable packers to be lowered into well along with flow string. One flow string end is closed to provide simultaneous well bore packing, another end is connected to production equipment. Flow string is provided with centralizers located near inflatable packers. Formed in flow string are additional holes located opposite to packers. Well pump is installed inside flow string. High-pressure water conduit having low diameter is connected to above holes. Flow string has perforated orifices created between inflatable packers.

EFFECT: extended operational capabilities.

1 dwg

Sampler // 2257471

FIELD: oil-field equipment, particularly for obtaining fluid samples or testing fluids in boreholes or wells and may be used for integrated obtaining sample of multicomponent liquid-gas systems transported through pipelines.

SUBSTANCE: sampler comprises hollow body installed in high-pressure pipeline of wellhead fittings and extraction chamber with discharge channels. Rotary tool adapted for multicomponent liquid-gas medium flow regulation is installed inside the body. Sampler also has shutoff member with actuated sample extracting valve, handle and guiding tube. Sampler comprises hollow body made as a part of high-pressure pipeline and tool adapted for multicomponent liquid-gas medium flow regulation arranged in hollow body. The tool consists of flap installed on a shaft and having diameter corresponding to inner hollow body diameter, extraction chamber used to extract and mix multicomponent liquid-gas medium flow formed as annular cavity around hollow body. The cavity is divided into inlet and outlet parts by partition arranged at flap level. Inlet and outlet parts communicate with common multicomponent liquid-gas medium flow correspondingly through inlet and outlet channels on hollow body and through opening formed in the partition at sample extracting valve inlet. Drive screw installed in shutoff member body is connected with sample extracting valve so that drive screw and sample extracting valve may perform mutual rotation and move in axial direction. Sample extracting valve and shaft with flap mate each other so that they may perform synchronous limited rotation about common axis and mutual axial movement.

EFFECT: increased simplicity, provision of high-quality mixing of sample product and increased sample reliability.

3 dwg

Sampling device // 2258807

FIELD: oil field equipment, particularly for take samples from wellhead, namely for integrated sampling multi-component gas-liquid medium transported through pipelines.

SUBSTANCE: device has hollow body built in pressure pipeline and formed as a part of the pipeline located on vertical part of wellhead fittings. Multi-component gas-liquid medium flow control unit is made as a gate connected to rotary support shaft. Sampling chamber is created as annular cavity arranged on hollow body at gate level. Sampling chamber inlet is communicated with multi-component gas-liquid medium flow through intake manifolds formed on hollow body. Intake manifolds are side slots arranged symmetrically about gate axis of rotation. Sampling chamber outlet is communicated with shutoff member installed on rotary gate support shaft extension. Shutoff member includes seat, hold-down screw and ball contacting with the seat and embedded in pressure screw end.

EFFECT: simplified structure and increased sampling quality.

2 dwg

FIELD: mining industry, particularly to take subsurface oil samples in running and exploratory wells working in flow mode.

SUBSTANCE: sampling device has tubular body with lock mechanism arranged inside the body and connected to controlling valve assembly from the first side and controllable valve assembly from the second side thereof. Joint relay is screwed on the controlling valve assembly. The controlling assembly is retained in its opened position by joint relay including body with orifices for pin receiving, pusher acting upon the controlling valve assembly and bush with fluid circulation orifices. Valve assemblies include all-rubber valves having 30° cone angles. The relay has barbs to engage with production string connector. When sampling device moves downwards the barbs are brought into folded state.

EFFECT: increased operational reliability and prevention of oil sample degassing due to improved air-tightness of sampling device interior.

2 cl, 1 dwg

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