Continuous data recorder for downhole sample cylinder

FIELD: oil and gas industry.

SUBSTANCE: invention refers to subsurface sampling and specifically to continuous measurement of concerned parameters, as well as hydrocarbon sample analysis performed on sampling point after installed in sampling chamber of the downhole device. The device contains downhole sampling chamber for formation fluid sample and control module connected by fluid channel to a part of formation fluid sample in downhole sampling chamber and designed to control concerned parameter of formation fluid sample. Besides method for controlling concerned parameter of formation fluid sample is offered.

EFFECT: provided continuous control of sample integrity including sample surfacing to its delivery to analysis laboratory.

23 cl, 4 dwg

 

The technical field to which the invention relates.

The present invention relates generally to the selection of the deep samples, in particular for continuous measurement of parameters of interest, as well as samples of hydrocarbons, performed at the place of sampling after placing the sample into the sample chamber of the downhole tool to ensure the integrity of the sample prior to its transfer to the laboratory for analysis.

The level of technology

Reservoir fluids in oil or gas wells are typically a mixture of oil, gas and water. Phase mixing ratio is determined by pressure, temperature and volume of reservoir fluids enclosed in a confined space. In underground rocks high pressure well fluid often causes the absorption of gas oil with the formation of supersaturated solutions. With decreasing pressure absorbed or dissolved gaseous compounds are distinguished from the liquid phase of the sample. Accurate measurements of pressure, temperature and composition of the formation fluid from a particular well affect the assessment of the economic feasibility of producing fluids from a well. These data also provide information on ways to maximize the effectiveness of the completion and development of the corresponding reservoir hydrocarbons.

The number of known methods of analysis wells what's fluids in the well environment. In the patent US 6467544 (Brown and others) described the sampling chamber with a movable piston bounding a cavity in which the sample from one side of the piston and the buffer cavity. In the patent US 5361839 (Griffith and others, 1993) revealed the transmitter to signal characterizing the properties of the sample fluid in the well environment. In the patent US 5329811 (Schultz and others, 1994) described a device and method of assessment data for pressure and volume for the deep sample of the downhole fluid.

Other methods include sampling well fluid to release it to the surface. In the patent US 4583595 (Czenichow and others, 1986) the mechanism of reciprocating drive for assaying downhole fluid. In the patent US 4721157 (Berzin, 1988) described the sliding valve sleeve to be concluded in the camera sample of the downhole fluid. In the patent US 4766955 (Petermann, 1988) described the piston that interacts with a valve for sampling well fluid, and in the patent US 4903765 (Zunkel, 1990) - downhole sampler with time delay. In the patent US 5009100 (Gruber and others, 1991) described the descent on the cable sampler for sampling well fluid from the well to the desired depth. In the patent US 5240072 (Schultz and others, 1993) describes triggered on annular pressure sampler multiple steps for selection of the deep samples of well fluids at different points in time and RA the different depths, in the patent US 5322120 (Be and others, 1994) disclosed an electro-hydraulic system for sampling well fluid from the wellbore at great depths.

In deep wells the temperature often exceed 300°F. When removing hot samples of formation fluids to the surface, where the temperature is about 70°F, due to the temperature drop of the sample formation fluid tends to shrink in size. If the volume of the sample remains constant, this reduction leads to a significant decrease of the pressure of the sample. The pressure drop leads to changes of the parameters inherent in Plast fluid in natural groundwater (in situ), which may cause phase separation of liquids and gases absorbed break of the formation fluid. Phase separation entails a significant change in the characteristics of the formation fluid and reduces the real possibility of assessment of real properties of the formation fluid.

To overcome this drawback, various techniques have been developed aimed at maintaining samples of formation fluids under pressure. In the patent US 5337822 (Massie and others, 1994) the pressure in the sample formation fluid is supported by a piston with a hydraulic actuator driven by compressed high-pressure gas. Similarly, in patent US 5662166 (Shammai, 1997) to compress the sample formation fluid is gas under pressure is the group. In patents US 5303775 (1994) and US 5377755 (Michaels and others, 1995) revealed piston pump double acting to increase the pressure in the sample of formation fluid to a value greater than the saturation pressure, so that the subsequent cooling does not lead to reduction of pressure of fluid below the saturation pressure.

Because of the uncertainty of the recovery process samples have to doubt the credibility of the results of any laboratory tests restored single-phase samples of oil PVT properties. When using conventional sampling tanks the problem of cooling of the sample and the separation of the two phases are trying to minimize by application to the taken in the borehole test gauge pressure exceeding the formation pressure (4500 or more pounds per square inch). The application of excessive pressure is to try to squeeze in a fixed tank additional amount of oil, so that after cooling the sample to a temperature on the surface of the pressure in the sample of oil was sufficient to maintain the oil in single-phase state and at least match the pressure acting on the oil in the well environment.

Thus, in the sample reservoirs to collect single-phase samples of the gas cushion facilitates the preservation of the sample in a single-phase condition, because the reduction of the oil sample gas p is ducky expands supporting acting on the oil pressure. But if the oil is too decrease in the volume of the gas cushion (which expands to the same extent, in which the oil is reduced) can be extended so that created by the pressure on the oil drops below the formation pressure, causing a drop in oil asphaltenes or the formation of gas bubbles. There is therefore a need in the control sample integrity, starting with the lifting of the sample to the surface and before it is delivered to the laboratory for analysis.

Summary of the invention

The present invention solves the problem of overcoming the above described disadvantages of the prior art. The present invention provides apparatus and method for continuous monitoring integrity under the pressure of the sample fluid collected in the well. After sampling depth sampling device for continuous data logging, attached to the downhole sample chamber, periodically, i.e. after a certain period of time measures the temperature and pressure of the deep samples. In addition, the sample is subjected to optical analysis with the use of radiation in the near/medium range infrared (IR) region and in the visible region of the spectrum, which allows to study the properties of the sample and the level of pollution. The analysis of the sample at the point of selection includes the determination of the gas factor, the density of oil in degrees ANI, as well as many other parameters that can be estimated using the trained neural network or chemometric equations. In addition, using Flexural mechanical resonator (i.e. resonator, which is excited bending vibration) can measure the density and viscosity of the fluid, on the basis of which it is possible to estimate additional parameters, using the trained neural network or chemometric equation. In order to avoid undesirable pressure drop or other impact of the removal of a small sample in a device of continuous registration data into the sample reservoir create excessive pressure.

Brief description of drawings

Below the invention is illustrated by the example of its implementation with reference to the accompanying drawings in which the same structural elements denoted by the same positions and in which is shown:

figure 1 - schematic geological cross-section of the strata of rocks, illustrating the environment in which it is expected the implementation of the invention,

figure 2 - schematic representation proposed in the invention of the device in Assembly with auxiliary tools

figure 3 is a schematic depiction of a system for retrieval and delivery to the surface of a representative sample of formation fluid,

figure 4 illustrates an example of the execution module of the device for continuous data logging, provided in the present invention.

Description of the preferred variant of the invention

Figure 1 is a schematic geological cross-section thickness of 10 breeds in length were drilled in her hole 11. Typically, the well is at least partially filled with a mixture of liquids, including water, drilling mud and formation fluids flowing into the well from open borehole rocks. In this description such mixtures are referred to by the term "downhole fluids". The notion of "wireline fluid" is used below in respect of fluid from a particular layer not containing impurities and not contaminated liquids, which in this layer in a natural way not found.

In the well 11 is lowered, the sampler 20 is suspended on the lower end of the cable 12. The cable 12 is typically passed through a pulley 13 mounted on the drill rig 14. The descent and ascent of the cable produced with the assistance of a winch, for example, on a truck with 15 equipment for maintenance.

Figure 2 schematically shows an embodiment of the sampler 20, for carrying out the present invention. Tools of the sampler is preferably represent a layout with several located in a number of sections, which are connected to the ends of the threaded bushings 23 compression with denitely couplings. The composition of such a composition may include a hydraulic power unit 21 unit 22 selection of the fluid. Lower unit 22 selection of the fluid is pumping unit 24 volume type with a large working volume, intended for flushing hydraulic lines. Below the pump with a large displacement is similar to the pump unit 25 volume type with a smaller displacement of which is controlled in quantitative terms, as explained more with reference to figure 3. Usually under the pump a smaller volume are arranged one or several sections 26 of tank storage for the samples of fluid. Each section 26 may include three or more reservoir storage for 30 samples of fluid.

Unit 22 sampling fluid contains retractable receiving the probe 27 and on the opposite side from his hand - paws 28 to rest on the borehole wall. As the receiving probe 27 and on the opposite side legs 28 are nominated by the hydraulic drive, coming into intimate contact with the borehole wall. Design and principle of operation of the unit 22 for selecting the fluid described in detail in US patent 5303775, the contents of which are included in this description.

During transport of the samples contained in sample vessels, laboratory PVT properties or during handling of the sample intermediate reservoir can okazyvat is camping under the influence of variable temperatures or pressures, that leads to pressure fluctuations in the reservoir. Therefore, the continuous pressure of the sample over time provides a very important and valuable information. In the exemplary embodiment of the present invention to solve this problem we use the device of continuous data logging. This device contains stainless steel housing, a circuit Board with electronic components for control and recording of pressure, temperature and other parameters of the fluid, and a rechargeable battery to power the circuit boards with electronic components. Device for continuous data logging can be set for reception in the bore of measuring pressure and temperature, and other parameters of the fluid during sampling, extraction, transport and transfer in the terrestrial laboratory analysis of PVT properties. The present invention allows to obtain data characterizing the state of the sample during sample transport to the laboratory. Data provided by the device of continuous registration data are of great value to the customer and the service firm, providing services for sampling, because the shipping of samples to the client from the location of the wells often mistakes can happen and the accident, which make very expensive sample useless for studying the fluid on the subject of the issue is possible solids. Clients do not want to pay for samples, spoiled due to changes in pressure and temperature. Continuous registration data over time allows customers to conduct a much more accurate and complete assessment of the quality of their samples than ever before, and set the source of the problem.

The present invention solves the problem of lack of information about the state of the sample during its movement from the downhole sampling of the tank to another tank, for example in the camera for laboratory analyses. Preferably, during displacement of the sample pressure was always higher than the reservoir pressure, which gives confidence that the sample is not moved in two-phase state. Preferably also, to acting on the sample pressure was maintained at a level exceeding the pressure at which the sample begins precipitation of asphaltenes. The lack of necessary equipment and lack of qualified personnel often cause problems when moving samples that customers in the past did not pay attention. However, from customers showed great interest in obtaining relevant information describing the picture changes parameters sample time and allowing you to properly evaluate this issue.

The present invention provides a continuous readout devices for temperature, giving the structure and other parameters of the sample fluid, since sampling in the well and to move the sample from the sample reservoir for laboratory research. In a preferred embodiment, the registration of these data is carried out periodically, i.e. after a certain period of time, for example 10 times per minute, and over time, up to one week, although the registration period parameter may be extended. Client represent a chart of time dependence of the recorded variables, represents the time variation of the pressure, temperature and other parameters of the sample fluid.

The present invention allows to investigate the properties of reservoir fluids, without compromising the sample as a whole. One of the serious difficulties faced by service companies, with regard to any sample analysis conducted at the point of selection is the recovery of the sample. If the sample is carefully not to restore, then removing any part of it for analysis at the sampling location will change the overall composition of the original sample. The recovery process is either impossible or very often long, taking 6-8 hours, depending on the specific composition of the sample.

This invention provides specialists with a simple but effective way to not only receive the necessary information about the nature of changes of pressure, temperature and other parameters fle is Yes in time, but hold on the place of sampling a preliminary analysis of PVT properties and additional analysis. The present invention provides for obtaining much-needed graphs of the time-dependent (pressure and temperature) during recovery samples, as well as information during the movement of the sample.

The present invention allows customers to separate errors laboratories for the study of PVT properties, which could lead to the loss breakdown of its quality, from the results of the services involved in sampling conditions. Thus, the present invention will allow service companies that provide services for sampling, to significantly increase the efficiency of work on the identification and removal of errors in sampling, as well as reduce the severity of complications during sampling.

Figure 4 shows a generic embodiment of the invention. In this embodiment uses the module device 710 continuous registration data attached to the downhole sample chamber 712, the relevant requirements of the U.S. Department of transportation. Thus, the sample reservoir and a device for continuous registration data together with each other to transport the client or in the laboratory, allowing continuous recording characteristics are interested in properties of the sample in time (ka is Tina changes in these indicators over time). As mentioned above, the sample is kept under positive pressure to its pressure exceeds the formation pressure. The device 710 continuous registration data contains the primary valve 714 manually operated, line 716, connecting the sample reservoir 712 to collect single-phase samples and the primary valve 714 with manual control. The structure of the device for continuous data recording also includes the analysis module 738 for analysis of samples at the sampling location that contains the module 738 optical analysis with the use of radiation in the near/medium range infrared spectral region and in the visible region of the spectrum (in the drawing, detail not shown), the CPU 726 (in the drawing, detail not shown) and Flexural mechanical resonator 727 (in the drawing, detail not shown). In addition, the structure of the device for continuous registration data includes a secondary valve 732 with manual control, aperture 730 to retrieve the sample, the pressure sensor (manometer) 722 (in the drawing, detail not shown), the Registrar or recorder, 725 (in the drawing, detail not shown), and the port 728 data. In a typical embodiment of the invention, the device 710 continuous data logging is attached to the sample tank 712, podavlivaya for sampling in-phase condition. In a typical embodiment of the invention, the device 710 continuous is registracii data is attached to the sampling reservoir so to establish communication between the primary valve 714 manual that is included with the device for continuous data logging, and the breakdown 740 fluid. Sample 740 fluid podavlyaetsya or loaded pressure from the pressure source 719, located on the back side of the piston 721 sample reservoir to hold the sample 740 under pressure, preferably in excess of formation pressure. A small part of the sample 740 enters the channel 716, located between the closed primary valve 714 with manual control and the breakdown 740. The primary valve 714 manual open, and taken for the sample fluid enters the channel 718, located between the open primary valve 714 with manual control and a closed secondary valve 732 with manual control.

By the device of continuous data logging with the cable 717 connect portable reading device 726. Closed secondary valve 732 manual retain some of the sample fluid in the channel 718, but at the same time taken for the sample fluid is connected with the pressure sensor 722 and the Registrar 725. Power electronic equipment, devices for continuous data logging, which includes the pressure sensor 722, the Registrar 725 and analysis module 738 for the analysis of samples at sampling location, from a battery 724.

T is mperature and the pressure measured by the temperature sensors 729 and pressure 722 (in the drawing, detail not shown) and recorded by the Registrar 725 (in the drawing, detail not shown). Then disable the portable reading device and close the primary valve 714 with a manually operated locking the portion of the specimen between the primary and secondary valves with manual operation. To connect your device continuous registration data to in-situ sampling, ground-based equipment through the hole to retrieve samples, you can open the secondary valve with manual control. The analysis module 738 includes equipment for analysis of samples at the sampling location with the use of radiation in the near/medium range infrared spectral region and in the visible region of the spectrum to assess sample integrity at the point of selection or to the study sample on a permanent basis. Analysis tools with the use of radiation in the near/medium range infrared spectral region and in the visible region of the spectrum described in patent application U.S. No. 10/265991, the rights to which are owned by the owner of the rights in the present invention and which fully included in this description by reference. Thus, the device of continuous data logging provides continuous recording parameter of interest of the sample. To the parameters of interest are the pressure, the temperature of the sample and the received time data analysis of samples using radiation in the near/medium range infrared spectral region and in the visible area of the Spa is tra, the record which is carried out continuously. The analytical module 728 also includes a Flexural mechanical resonator, described in patent application U.S. No. 10/144965, the rights to which are owned by the owner of the rights in the present invention and which fully included in this description by reference. The device continuously reads data logging sensor readings of pressure and temperature, as well as data analysis of samples using radiation in the near/medium range infrared spectral region and in the visible region of the spectrum with the current frequency (1/5 or 1/10 min) and stores them in memory. After connecting the device continuous data logging on the tank install the safety cover, and now the tank is ready for transportation to the laboratory for testing PVT-properties.

To provide communication between the device continuous data logging and break fluid device continuous data logging can be connected on the surface before descending into the well. In this configuration, the pressure, temperature and the results of analysis of samples using radiation in the near/medium range infrared spectral region and in the visible region of the spectrum can be written in the well prior to sampling, the selection process, during lifting of the sample to the surface and during transportation of samples to the laboratory is Tory, that provides continuous registration throughout the lifetime of the sample.

In another embodiment of the proposed invention the method is implemented in the form of a set running on the computer commands, stored on a machine-readable data carrier, which may be represented by read-only memory (ROM), random access memory device (RAM), compact disk (CD-ROM), flash memory or any other machine-readable media, known or unknown at the present time that, when executed on a computer implement the method proposed in the invention.

The implementation of the invention was described above on the example of his particular options, but experts should be obvious possibility of carrying out the invention and in other modified versions. It is assumed that any such changes fall under patent claims set forth in the accompanying claims. Examples of the most important features of the invention have been presented in a rather generalized form, in order to assess their contribution to the prior art. There are, of course, additional features of the invention disclosed in the accompanying claims.

1. Device for controlling the interesting parameter sample of formation fluid, containing

skvazhina the sample chamber to accommodate samples of formation fluids and

a control module which is connected through a channel for the fluid part of the sample of formation fluid in the downhole sample chamber and designed to control the parameter of interest of a sample of formation fluid.

2. The device according to claim 1, containing a valve associated with the conduit for supply of the sample of formation fluid in the control module.

3. The device according to claim 1, containing a secondary valve associated with the channel for selective retention of the sample fluid in the channel.

4. The device according to claim 3, in which the primary and secondary valves cooperate to isolate the portion of the sample fluid in the channel.

5. The device according to claim 1, containing a temperature sensor for monitoring the temperature of the sample fluid or a pressure sensor for monitoring pressure of the sample fluid.

6. The device according to claim 1, containing the Registrar for the registration of a parameter of interest of the sample fluid.

7. The device according to claim 6, in which registers with one of the following options: change of pressure, temperature and radiation in the near/medium range infrared spectral region and in the visible region and in the visible region of the spectrum.

8. The device according to claim 1 containing analysis module for analysis of the sample fluid with the definition of the first parameter of interest of the sample fluid.

9. The device according to claim 8, in which the analysis module contains the optical system and the aleesa.

10. The device according to claim 8, in which the analysis module contains a Flexural mechanical resonator.

11. The device according to claim 8, in which the analysis module contains a neural network for estimating a second parameter of interest of the sample fluid based on the first parameter of interest of the sample fluid.

12. The device according to claim 8, in which the analysis module contains a chemometric equation for evaluating the second parameter of interest of the sample fluid based on the first parameter of interest of the sample fluid.

13. The device according to claim 1, containing a reading device to display one of the required parameters.

14. The device according to item 13, in which the reader is selectively connected to the control module.

15. The control method parameter of interest of a sample of formation fluid, the implementation of which

taken in the borehole sample fluid into the sample chamber, establish communication between part of the sample fluid and the control module through the channel for a fluid in direct contact with the sample, and

control parameter of interest of the sample fluid using the control module.

16. The method according to clause 15, which separates the part of the sample fluid from the sample chamber by placing the channel of the valve.

17. The method according to clause 16, which hold the sample fluid in the analog between the first and second valves.

18. The method according to item 15, in which the control pressure or temperature of the sample fluid.

19. The method according to clause 15, which carry out registration of interest parameter of the sample fluid.

20. The method according to item 15, in which the analysis of the sample fluid with the definition of the first parameter of interest.

21. The method according to claim 20, in which the optical analysis of the sample fluid.

22. The method according to claim 20, in which the analysis of the sample fluid using Flexural mechanical resonator.

23. The method according to claim 20, in which on the basis of a parameter of interest of the sample fluid using the neural network estimate the second the parameter of interest of the sample fluid.

Priority items:

02.05.2003 according to claims 1-23.



 

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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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