Method for detection of geological properties of terrigenous rock
SUBSTANCE: method includes geophysical surveys of wells, identification of filtration-capacitance properties in core (Kp - porosity, Kper - absolute permeability) of rocks opened by well, processing of all the information obtained with assessment of geological properties and further extraction of collector intervals. Rock is modeled as a structural frame with various dimensions of porous channels that shape pore space. Using above-mentioned representations, shape of rock geological properties reflection is determined into its petrophysical properties depending on values of pore radiuses and ranges of porosity variation, petrophysical models of rock geological properties reflection are established. In process of geophysical surveys of well cuts rock porosity (Kp) is defined in open boreholes. Based on application of petrophysical models of rock geological properties reflection, absolute permeability (Kper) is calculated in each well for each bed, taking into account geometry of pore space of rock, which is an index of structural-mineralogical heterogeneity of geological medium, its filtration-capacitance properties, absolute and phase permeability.
EFFECT: detection of geological properties of terrigenous rocks.
1 ex, 1 tbl, 4 dwg
The invention relates to the exploration wells can be used when determining geological properties of terrigenous rocks, in particular, in the study of heterogeneity of the rock cut and square, when determining structural-mineralogical and fluid models of the geological environment with the delineation of different geological bodies and reservoirs, the construction of a permanent geological models of oil and gas fields, for efficient well placement and selection of effective methods of influence on reservoir/reservoirs in their design.
There is a method of determining the composition of the terrigenous rocks of the reservoir, based on the processing of geophysical data studies of borehole sections (GIS), including the selection in the well section of the reservoir intervals, determination of the clay content and the nature of the distribution of the clay material in the rock, porosity, absolute and relative permeability .
The known method is implemented in accordance with  and allows to determine reservoir characteristics highlighted in the well section of the reservoir with the application in the processing of readings logging theoretical empirical petrophysical models and stochastic petrophysical relationships established on the basis of studies selected and the wells in the intervals of occurrence of rocks reservoir cores sample and analyze the relationships of type Cairn Cairn, the core-GIS and GIS-GIS.
The known method has limitations when determining geological properties of rocks due to the fact that correlation CRC=f (KP) does not take into account the geometry of the pore space and is generalized petrophysical formation model.
There is a method of determining geological properties of terrigenous rocks in the well vicinity according to geophysical borehole sections (GIS), including the execution of geophysical surveys in the borehole and processing the received information identifying intervals collectors and assessment of their geological properties .
The method is based on processing of GIS data, using petrophysical models that take into account the high content in the skeleton rocks silty material and clays having different distribution (dispersed, structural, layered) in the array of the breed. During processing of GIS data to determine the coefficient of porosity, content of sand, silt and clay fractions in the skeleton of the breed.
The known method has limitations when determining geological properties of terrigenous rocks for use in the process of reading logs simplified theoretical and stochastic petrophysical models that are applicable for approximate evaluation of the geological properties of rock collectors, be the accounting geometry steam space.
Closest to the invention to the technical essence is a method of determining geological properties of terrigenous rocks in the well vicinity according to geophysical borehole sections , which includes performing an advanced complex of geophysical research (CC-gamma logging, COG-neutron-gamma logging, AK-acoustic logging, GTK-gamma-gamma logging, PS-method natural electrical potentials, KS (BK, MBK, MKZ, IR, BKZ, PZ, high-frequency logging methods electrical resistivity, KV-cavernosometry), processing the received information to determine geological properties of the formation and isolation of the reservoir intervals, the simulation of the breed as a structural frame forming the pore space and the electric charge of the pore channels, the form definition reflect the geological characteristics of the breed in its petrophysical properties depending on running in them integral adsorption processes, the scale of which is determined by the ratio of the values of the electric charge pores and mineralization saturating pore water and uglevodorodokislyayuschih expressed in the change of physical fields of GIS methods (electric, acoustic, radioactive properties, hydrogen, bulk density of the rocks), the establishment of petrophysical models reflect the geological the practical characteristics of the breed, which are the indicators of structural-mineralogical heterogeneity of the geological environment, its reservoir properties, absolute and relative permeability.
The disadvantages of this method is that the method focuses:
on modern advanced complex GIS (GK, NGK, AK, GGK, PS, IR, BC, BKZ, PZ, MBq, high-frequency logging, MKZ, KB) in uncased wells drilled in brackish wash fluids that cannot be used on an industrial scale when working with production wells, the drilling of which is often held at the saline wash liquids.
- When working with the old wells, investigated a limited set of geophysical methods (CC, COG, COP, KS, KB, MKZ, BC, IR), which makes it impossible for a comprehensive interpretation of the data survey.
- The use of particle size distribution in the core in an industrial scale is not provided in small core samples and their few studies.
The objective of the invention is determining geological properties of terrigenous rocks, based on the use of any completed geophysical studies of borehole sections (GIS), including a limited range of GIS, regardless of the parameters of drilling fluid, in the absence of data on granuloma the practical part of the core, by creating petrophysical models for each terrigenous rocks/reservoir deposits taking into account the geometry of the pore space in certain ranges of porosity.
The task is solved in that in the method of determining geological properties of terrigenous rocks, including the execution of geophysical research sections of wells, processing the received information with the assessment of the geological properties of the rocks composing terrigenous thickness, the allocation of the reservoir intervals, the simulation of the breed as a structural frame forming the pore space, the form definition reflect the geological characteristics of the breed in its petrophysical properties, determination of petrophysical models of the geological characteristics of the breed, the definition in uncased wells according to the GIS hydrogen rocks (porosity KP), the definition of the geological characteristics of the breed, which are indicators of structural-mineralogical heterogeneity of the environment, its reservoir properties and absolute permeability, modeling breed, as the structural frame is produced by using a certain method R35 Vinland sizes of the radii of pores, establish petrophysical model for core analysis (KP, CRC) depending on the combination of these parameters and geometry of the pore space, with each point group formation op the shift equations of the form CRC=10 A*log(CP)+where a and b are constants that depend on the radii of the pores and intervals of change of porosity, determine the geological characteristics of the breed, its reservoir properties, structural and mineralogical heterogeneity of the rocks on the areal and vertical, absolute permeability at the established petrophysical models in each well for each layer in a certain interval changes of porosity in the formula as KP is used, the porosity is calculated by the GIS, then simulate the permeability field over the entire area of the development of terrigenous rocks/reservoir.
Features of the invention are:
1) execution of geophysical surveys open-hole sections;
2) the definition of core porosity and permeability (KP-porosity, CRC is the absolute permeability) opened by the well rocks,
3) processing of the received information with the assessment of the geological properties of the rocks composing terrigenous thickness, and the allocation of the reservoir intervals,
4) modeling of the breed as a structural frame with different sizes of pore channels forming the pore space,
5) the definition of core forms reflect the geological characteristics of the breed in its petrophysical properties depending on the structure of the pore space (pore radii) and intervals porosity,
6) installation is of petrophysical models reflect the geological characteristics of the rock depending on the ranges of porosity and geometry of the pore space,
7) determination of the geological characteristics of the rock are indicators of structural-mineralogical heterogeneity of the environment, its reservoir properties and absolute permeability,
8) modeling the permeability, the identification of the size and shape of sand phone Signs 2, 3, 7 are shared with the prototype, attributes 1, 4, 5, 6, 8 are the salient features of the invention.
Using known methods petrophysical models and relationships (core-core) allows to determine the geological properties of the reservoir rocks composing the reservoir/reservoir, based on the generalized without taking into account the structure of the pore space, it is not possible to reliably estimate the geological properties of the reservoir rocks and tires (non-reserves), to determine the distribution of the sand body in the space, resulting in their use cannot restore the geological characteristics of terrigenous strata of the rocks with accuracy and detail required to build geological models of sand bodies (hydrocarbons), which are used to optimize hydrocarbon production. Restrictions impose performed bounded complexes of geophysical research (GIS), conditions for GIS and small amounts of laboratory core studies, especially gr is nanometre. To build and study the geological model of the reservoir/reservoir should:
a) to explore the geological heterogeneity of the studied terrigenous rocks in the incision area;
b) to reliably distinguish the various lithological formations and reservoirs (sand body);
C) to reliably determine reservoir properties and to determine the fluid model;
g) to reliably estimate the permeability based on the structure of the pore space,
d) to accurately simulate the permeability field when building a permanent geological models of oil and gas fields.
In the proposed invention also solves the problem of increasing detail and accuracy determine the logging data and core analysis porosity and permeability characteristics of the rocks composing terrigenous thickness based on the use of petrophysical models reflect the geological properties of the rock taking into account the radii of pores, more accurately describing filtration-capacitive properties of terrigenous rocks and linking these properties to its structural features.
The basis of petrophysical models of reflection is the idea that different terrigenous rocks are characterized by a single petrophysical laws, but the unique value of options porous the th-permeability-pore", which are formed in the physical properties specific terrigenous rocks sand bodies depending on the conditions of sedimentation.
These physical properties of rocks determine the features to be installed on the core and logs petrophysical relationships for individual allocated a total thickness of rock stratigraphic units (formations/hydrocarbons). Thus, applying petrophysical models of reflection at specific intervals porosity and taking into account the radii of the pores, reflecting the basic petrophysical patterns, and can be measured reliably geological properties specific terrigenous rocks.
Applying petrophysical models of reflection is crucial to build permanent geological-technological field models. This is due to the following reasons:
- use the entire Fund drilled at the field wells with a different set made of geophysical methods of research regardless of the type of drilling fluid, including wells old Fund in which you have a limited set of GIS,
- errors are excluded when determining the volume of the rock models in the context arising from the use of generalized stochastic relations for the group of neighboring even-aged deposits, as it is used in promyshlennykh ways,
- use a more complete geological information about the investigated complex rocks allows the study of the geological model of the environment in General and to identify the amount of rocks and geological square body with different structural and mineralogical characteristics, to implement lithological facies analysis of the rocks and explore their heterogeneity.
Thus, applying petrophysical models of reflection will provide more reliable data about the geological properties of the rocks in the incision area, allows you to set the development of the sand bodies, gives the opportunity to build a more complete and detailed geological model of each of terrigenous reservoir/reservoir and hydrocarbons in General.
When creating petrophysical models of reflection for terrigenous rocks in the framework of the present invention have been updated knowledge about some of the most important regularities of the influence of the structure of the pore space in terrigenous rocks on the formation of their reservoir properties. The result revealed new and/or revised-known most important basic petrophysical patterns for terrigenous rocks and developed new petrophysical model to determine the geological characteristics and the absolute permeability of the rocks.
Corresponding is fixed by the present invention representations of each elementary volume of the geological environment within sedimentary strata and specifically in the vicinity of the well is a structural frame, forming the pore space of different geometry depending on porosity.
As you know, participation in the filter pore channels of different sizes are unequal, as the mouth then limit the movement of fluids. Active for fluid goes mainly through United into a single system the largest pore throats, and revealed a clear pattern of decreasing radii of the pores in the transition from the best collectors for the worst. Pores with radii less than 0.5 microns are not involved in the filtration process, the movement in them is not subject to the law Darcy, as the fluid is held high capillary forces, and filtering when the real pressure gradients is not.
So, Dale Vinland built an empirical relation of porosity, permeability and radius of the mouths of the pores on the basis of laboratory studies (mercury porometry) , which has the form
Substituting different radii of the pores in the formula 1 are different according CRC=f(KP), which figure 1 shows in the form of curves in the graph field (cipher curves is the pore radius in microns). From figure 1 it is seen that with the increase of the radii of the pores with the same value of porosity (CP) permeability (CRC) is increasing. Figure 1 further used as three-dimensional maps.
Description figure 2.
Figure 2 shows a generalized dependence is awn-specific field where in the lower Carboniferous selected 6 of productive layers (C2-C7). Based on the fact that the layers of even-aged, have the same temperature and pressure conditions and depth 1300-1350 m, traditionally in the calculation of reserves and the construction of geological-technological model uses a generalized dependence, obtained in particular on the core samples KP and CRC, and used data for all layers (formula 2).
The description of Fig. 3.
The obtained three-dimensional reticulation dealt with the point KP and CRC for each layer separately, the parameters KP and KPI defined in the core samples from the respective reservoirs (figure 3), and the same data KP and the CRC used in figure 2 and figure 2. As can be seen from figure 3, the points are located on sample groups, and different groups are described by different dependencies
where a and b are constants that depend on the structure of the pore space due to the fact that different layers are of different samples from the core, depending on the combination of parameters KP-CRC" points on the graphs are grouped around dependencies with different pore sizes, which means communication CRC=f(KP) for a specific group of points can be described by a specific equation.
This pattern exists in a certain range change Gearbox, which is also prolieve is camping on the chart. For each interval change KP points on the graph are grouped around curves with different radii of pores, and thus, for each interval change KP describes the different correlation relationships CRC=f(KP). The more selected intervals of change of control, the more accurately describes petrophysical reservoir model, table 1 shows the petrophysical model each layer visean deposits.
Consider the formation C6 (figure 3). It is seen that the groups of points with coordinates KP and CRC in different ranges KP fall on different curves (with different pore), and therefore petrophysical model of the reflection layer C6 is:
|Plast||The radius is then r, MK||CP, %||Correlation|
The intervals of non-reserves are described by formula 4, in accordance with the regulations, that the pores of radii less than 0,micron not involved in the filtration process.
Certain GIS KP for each of terrigenous formation in each well of the substitution in the formula of table 1 depending on the values of KP, we get for each layer in each well of the value of the CRC.
As can be seen from a comparison of figure 2 and 3, a generalized dependence (figure 2) does not reflect the true properties of terrigenous rocks reservoir/reservoir.
The permeability field is modeled by the square of the normal distribution of the obtained values of the CRC in each layer of each well. Received card field permeability area allows to estimate the geological heterogeneity of the reservoir, to carry out facial analysis, to determine the size of sandy phone Reliably simulated field permeability when building permanent geological models of oil and gas fields can identify and implement measures for the optimal development of hydrocarbon deposits.
Figure 4 shows the total CRC cards·visean deposits deposits, traditionally built on the generalized dependence (figure 4 b) and proposed method (figure 4 and table 1). As can be seen in figure 4 and clearly traced the outlines of the sand body, its size and distribution on the square at that time, as map 4 b does not reflect the true parameters of the Deposit. The analysis of the development of the visean saleimmediate over the last 5 years has confirmed the failed geological and technological activities in areas which new concepts are characterized by poor reservoir properties, and areas of the absence of the sand body and the location of injection wells with very low response in the areas of lack of sand bodies, which confirms the high efficiency of the proposed method for planning geologicheskikh activities in order to ensure rational development of deposits.
Thus, it is possible to draw a conclusion about the effectiveness of the proposed method, which allows you to use any complex GIS regardless of the parameters of drilling fluid in the absence of particle size on the core, to determine with high accuracy the structure of each of terrigenous formation and deposits in General.
The proposed method can be recommended to optimize the system design multilayer terrigenous deposits with the aim of maximum residual oil reserves.
|Petrophysical model layers visean deposits|
|Plast||g MK||The CP.%||CRC, MD|
|C3||2||KPg-12||CRC=10^(1.47 * lg(KP)-0.73)|
Sources of information
1. Methodological recommendations for determining estimation parameters for oil and gas deposits on materials GIW with the inclusion of the results of core analysis, sampling and testing of productive layers, Ed. Boundaryscan, Vfraser, Gel, helenin, NGO "Southfromjersey", 1990, 261 S.
2. Instructions for use materials geophysical study using the results of the study of the core and test wells to determine and justify estimation parametrov oil and gas deposits. Moscow, VNIGNI, 1987, 20 S.
3. Usagencies, Gashora, VHUTEINe. The method of estimating porosity and composition of the sand-aleurolite-clay rocks on geophysical data. Oilfield Geophysics. Issue 5. Ufa, Basepin ft, 1975, p.88-94.
4. EN 2219337 C1. The method of determining geological properties of terrigenous rocks in the well vicinity according to geophysical borehole sections. Afanas'ev V.S., Afanasiev S.V., A.V. Afanasjev
5. REVIEW OF THE WINLAND R35 METHOD FOR NET PAY DEFINITION AND ITS APPLICATION IN LOW PERMEABILITY SANDS and Mike Spearing, Tim Allen, Gavin McAulau (AEA Technology).
The method of determining geological properties of terrigenous rocks, including the execution of geophysical research sections of wells, processing the received information with the assessment of the geological properties of the rocks composing terrigenous thickness, the allocation of the reservoir intervals, the simulation of the breed as a structural frame forming the pore space, the form definition reflect the geological characteristics of the breed in its petrophysical properties, determination of petrophysical models of the geological characteristics of the breed, the definition in uncased wells according to the GIS hydrogen rocks (porosity KP), the definition of the geological characteristics of the breed, which are indicators of structural-mineralogical heterogeneity of the environment, its reservoir properties and absolute permeability, characterized in that the simulation of the breed as the structural frame is produced by using a certain method R35 Vinland sizes of the radii of pores, establish petrophysical models of geological the practical characteristics of the breed for core analysis (KP, CRC) depending on the combination of these parameters and geometry of the first space, with each point group formation described by equations of the form CRC=10And·log(CP)+where a and b are constants that depend on the radii of the pores and intervals of change of porosity, determine the geological characteristics of the breed, its reservoir properties, structural and mineralogical heterogeneity of the rocks on the areal and vertical, absolute permeability at the established petrophysical models in each well for each layer in a certain interval changes of porosity in the formula as KP is used, the porosity is calculated by the GIS, then simulate the permeability field over the entire area of the development of terrigenous rocks/reservoir.
FIELD: oil-and-gas industry.
SUBSTANCE: invention relates to field-geophysical analysis and can be used for visual control of well walls. Proposed device comprises TV camera with TV receiver interconnected via cable that moves up and down the well driven by special device arranged on top circular platform arranged to rotate in horizontal plane on bottom circular platform and aligned with it. Bottom platform is arranged aligned with the well and rigidly fixed at its mouth. Bottom circular platform upper surface accommodates reversing motor coupled via reduction gear with top circular platform and, via its control input, with reversing motor control unit. TV camera carries light source and laser radiator directed towards well mouth and furnished with optical adapter to transform laser beam projection point into light line passing along bottom circular platform radius to central photo receiver arranged on bottom circular platform edge. LH and RH photo receivers are arranged in symmetry with central photo receiver of the right and left of it. Said receivers are connected to appropriate inputs of control unit that control sense of rotation of aforesaid motor.
EFFECT: constant orientation of produced well wall image with respect to cardinal points.
FIELD: oil and gas industry.
SUBSTANCE: for this method, containing method of sample sampling of fluid in point of sampling, analysis of physical and chemical properties of fluid sample in sampling point, recordings of sample properties in point of sampling into archive of electronic data base, analysis of physical and chemical properties of sample of fluid in place remote from point of sampling, recording of sample properties in remote place into archive, checking of fluid sample fitness be means of comparison of properties in point of sampling and sample properties in remote place and recording of properties of checked for fitness of sample into archive.
EFFECT: providing of method of reliable and qualitative sample of fluid and improvement of data quality, controllability and conformity of data about fluids parametres.
32 cl, 4 dwg
FIELD: oil and gas industry.
SUBSTANCE: group of inventions relates to packers used during sampling of strata fluid medium and includes method of sampling and device for its implementation. Unit of inflatable packer contains one extensible tubular member with couple of annular dead-end poles, herewith one of supports is movable and the other is fixed on mandrel. Also at this packer it is annular fixing unit, developed from one of dead-end poles for reinforcement of tubular member during creation in it of pressure and its extension. Annular fixing unit contains multitude of plates, pivotally connected to support. Unit can contain the second similar extensible tubular member and the second annular fixing unit. Unit can contain between tubular members centraliser. Movable dead-end pole can allow directed inside surface, area of which increases area of directed outside surface. Method of development of couple of inflatable packers includes creation of pressure in packers, sampling of medium in interpacker space, pressure release for replacement of packers' unit, restriction of packer deformation at stage of pressure creation with usage of annular fixing unit.
EFFECT: reliability growth and increasing of durability of inflatable packers, simplification of process of its pacling and transaportation.
12 cl, 12 dwg
FIELD: oil and gas industry.
SUBSTANCE: invention refers to well survey, particularly to procedures of underground reservoir estimation by means of downhole instrument. For this purpose a viscosity gage-densimetre for a downhole tool is arranged in well borehole drilled through an underground reservoir. The downhole tool is designed for supply of at least a portion of reservoir fluid into the viscosity metre-densimetre. The viscosity metre-densimetre consists of a sensitive block and of a design diagram for calculation of at least two parametres of fluid, notably, viscosity and density. The sensitive block is located inside the downhole tool and contains at least two distanced in space connectors, a string suspended with tension between the connectors, and at least one magnet generating magnetic field interacting with the string. The string interacts with reservoir fluid when the viscosity metre-densimetre is inserted inside the downhole tool, and the downhole tool is located in the underground reservoir and intakes fluid from the underground reservoir. The connectors and the string are made out of materials with similar ratios of heat expansion and form a frequency oscillator.
EFFECT: increased reliability of device operation in well; upgraded accuracy of measuring parametres of reservoir in well.
18 cl, 17 dwg
FIELD: oil and gas industry.
SUBSTANCE: invention refers to oil and gas industry, particularly to hydraulic break of underground reservoirs required, for example for stimulation of oil or gas inflow into well. The method consists in the below described operations: a particle-target and/or propping agent are introduced into a rupture; further, electromagnetic radiation of from approximately 300 MHz to approximately 100 MHz frequency is emitted into the rupture; a reflected signal from the particle-target is analysed for estimation of rupture geometry. Here is also disclosed the method of estimation of underground rupture geometry including operations, where: the target and/or propping agent are introduced into the rupture; also the particle-target and/or propping agent contain high dielectric ceramic with dielectric constant more or equal approximately to 2; electromagnetic radiation of frequency less or equal to approximately 3 GHz is emitted into the rupture; signal reflected from the particle-target and/or propping agent is analysed for estimation of rupture geometry.
EFFECT: ensuring increased reliability and safety of estimation of rupture geometry of hydraulic break, decreased expenditures for this operation.
27 cl, 1 tbl
FIELD: oil and gas industry.
SUBSTANCE: invention refers to oil and gas producing industry, particularly to testing trial boreholes of hydrocarbon deposits of complex structure. During testing a trial borehole, a casing pipe is perforated, a production tree is installed, a long-length extreme line pipe is lowered to upper holes of a perforation interval and process fluid is replaced with water, while water is replaced with oil. As necessary level is dropped, the extreme line long-length pipe is lifted, inflow is initiated, and the bore hole is processed to a gas flare till stabilisation of wellhead parametres; further, there are lowered instruments for measurements of formation pressure and temperature, curve of pressure recovery is plotted, and depth and wellhead formation fluid is sampled. Upon this the extreme line long-length pipe is repeatedly lowered, the borehole is filled with water with successive replacement of water to process fluid and with installation of cement bridging; further, similar trial operations are performed at the overlying object. The borehole is abandoned upon testing all planned objects.
EFFECT: saving material and time expenditures at construction and test of trial borehole.
FIELD: measuring equipment.
SUBSTANCE: invention is related to hydrodynamic research of oil and gas wells, and may be used to study physical properties of their layers. Device comprises implosion chamber, packer module, moisture gauge, resistivity metre, sampler, module of samplers, slide valve unit, additional pressure sensor arranged over packer module. Besides slide valve unit is equipped with valves and installed over module of samplers with the possibility to switch flow of samples over to implosion chamber arranged in upper part of device, and to module of samplers through sampler, which comprises differential pistons, and sampler and implosion chamber are connected to well bore zone via vertical channel, where moisture metre, resistivity metre, sensor of layer pressure and temperature sensor are installed.
EFFECT: improved accuracy of research of hydrodynamic characteristics of oil and gas wells and improved quality of formation fluid samples at various depth due to elimination of well fluid effect at results of samples analysis and taking.
3 cl, 3 dwg
FIELD: oil-and-gas industry.
SUBSTANCE: sounding electrode assembly execute fluid medium sampling from a borehole, going through underground reservoir with a fluid medium, located beyond a contaminated fluid medium layer, surrounding the borehole. The sounding electrode assembly contains a case, executed with ability to move forward from down hole equipment and a located in the case parker, with a distal surface for the full contact with the borehole section. The parker has internal and external peripheries, at that the external one limited with a channel, going through the parker. The parker additionally equipped with a channel (channels) executed in the distal surface and located with ability to limit a ring cleaning intake nozzle between the internal and the external peripheries. A bypass channel goes through the parker for natural fluid medium bypassing and/or the contaminated fluid medium between channels. In the parkers channel a sampling tube installed densely for the natural fluid medium bypassing to the second intake hole of the case and to equipment.
EFFECT: providing of required compacting with the reservoir, increase of clean fluid medium flow into the equipment, fluid medium flow into the instrument optimisation.
26 cl, 42 dwg
FIELD: oil-and-gas industry.
SUBSTANCE: apparatus equipped with a pump (3), a sampler (6) wit a differential piston (7), samplers (13), a pressure controller (29, 30), located over and under a parker module and the pressure controller (31), located in a vertical channel (19), in which additionally located a receptivity metre (32), a drymetre (33), temperature controller (34). A parkering hermiticity defines with over and under parker pressure control, perform reservoir fluid injection a few times, measuring pressure and temperature, define water and hydrocarbons content of the pumped fluid from a separated reservoir space in a between parker zone. According to the temperature and pressure measurements draw a conclusion about reservoir fluids moving dynamics in a well, and according to the reservoir water content measurements and hydrocarbon content draw a conclusion about reservoir fluids samples content. At the presented factors positive dynamics sample in to the sample collectors.
EFFECT: device operation reliability increase, high quality reservoir fluids sampling.
5 cl, 3 dwg
FIELD: oil-and-gas industry.
SUBSTANCE: invention relates to underground formation analysis. Proposed device comprises instrument casing that can move inside wellbore extending into underground formation, probe housing carried by instrument casing and designed to isolate wellbore wall zone, actuating mechanism to move said probe unit between preset position whereat instrument casing moves and developed position intended for wellbore wall isolation. It comprises also perforator that passes through said probe unit to sink wellbore wall isolated zone section and pass through at least one of strengthened formations or casing strings, power source arranged in instrument casing and connected with perforator to control it. It uses also bypass line passing through instrument casing section and connected with at least one of the elements that follow, i.e. perforator, actuating mechanism, probe unit, and combination thereof to suck in brine fluid. It is connected also with pump arranged in instrument tool to suck in brine fluid into instrument casing through aforesaid bypass line.
EFFECT: higher accuracy.
18 cl, 24 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
SUBSTANCE: probe has non-magnetic hermetic body and cylindrical base, on which a hollow cylindrical magnetic duct is placed coaxially, with ring polar end pieces, ends of which are made in form of truncated cone with slanting angle of outer surface of end to cylindrical base, equal to 30° and ring polar shelf at middle portion and two generator coils, placed on both sides of ring polar shelf, and enabled oppositely. Probe also has an even number of indicator coils - multi-coil frames without a core, having a parallelogram shape in cross-section with slanting angle of greater side thereof to cylindrical base, calculated from formula. Indicator coils are placed axially and evenly distanced from cylindrical base, re placed evenly along the circle in two rows with maintenance of alignment between the latter and adjacently between each other, are made in two wires with forming of two windings. Upper row of indicator coils is placed above ring polar shelf, lower one - below it. Windings of indicator coils are connected in couples, enabled accordingly and successively. First couple has windings with the least number of coils, and is presented diametrically by opposite windings of indicator coils from different rows, and second - windings with number of coils being in 1.5 times greater and is formed due to connection of identical windings of indicator coils, placed at minimal space from each other, from different rows.
EFFECT: higher efficiency.
2 cl, 5 dwg, 1 ex
FIELD: oil industry.
SUBSTANCE: method includes making hermetic chambers with injection of good-compacting substance therein. Model is made in form of rectangular box or basin with filling of the latter with porous substance and its pressurization. Hermetic chambers are connected hydraulically to the model. Model and chambers are filled with low-compressible working liquid,. Volume of model pores is determined. Portion of working liquid is pumped from hermetic chambers into model at atmospheric pressure. Working liquid is fed into model with fixed pressure with control of working liquid amount, which amount flows backwards into hermetic chambers. coefficient of model compressibility is determined on basis of volume of liquid, which moved into hermetic chambers, fixed pressure and volume of pores in model.
EFFECT: higher efficiency.
3 cl, 2 dwg
FIELD: oil industry.
SUBSTANCE: method includes mounting elements, imitating cracks, in artificial porous substance. As elements, imitating bed cracks, metallic meshes folded twice or more are used. Areas and dimensions of meshes are determined by geometric likeness of modeled bed cracks. Porous substance is compacted between meshes. Model is hermetically sealed, vacuumized and filled with water under vacuum conditions. Water is pumped along and transversely to position of meshes. Penetrability of modeled bed is determined in said directions and water is displaced by model of oil.
EFFECT: higher efficiency.
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.
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.
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.
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
SUBSTANCE: device has non-magnetic body, electronic block, longitudinal and transverse probes with inductive coils, each of which has generator and receiver windings, while transverse probe has no less than three inductive coils, positioned along perimeter of central ferromagnetic core.
EFFECT: higher efficiency.
FIELD: well research, particularly means for drilling rock sample out of borehole in an airtight manner.
SUBSTANCE: device comprises case and hollow drill arranged in the case and having ring-shaped cutter. Stopper closing cartridge for sample receiving is kinematically linked with the drill by means of transmission mechanism. Transmission mechanism is formed as rotary drum with curved cut made in side surface thereof, deflecting finger and rotary arm. Deflecting finger slides in curved cut and is fixedly secured to drill body. Rotary arm is connected with the drum by one end thereof and with stopper by another end. Rotary arm is connected with stopper by means of mechanical couple including rod with plug. The stopper is arranged in cartridge lid and is made as rotary cylinder. Formed in the cylinder is through channel sized in accordance with the sample to be drilled out. Cylinder is provided with annular gaskets connected one to another by linear members. The rotary arm has an axis of rotation connected to device case.
EFFECT: simplified structure, increased reliability.