Method of testing wells and reservoir survey in process of boring and facility for implementation of this method

FIELD: oil and gas production.

SUBSTANCE: group of inventions refers to geological survey and oil and gas industry and can be implemented for testing of wells and for reservoir survey in process of boring. The method consists in lowering the facility with upper and lower packers, with a filter, bottomhole apparatus and bearing plate to bottomhole on drill pipes. The facility is equipped with bottomhole electric pump, with a back valve for packer pressure testing located above the filter, and with a flush sub assembled above the back valve. Further, the facility is equipped with a valve installed above the upper packer and communicating space between the upper and lower packers and circular space formed with an open well bore and drill pipes at open packers; the facility is also equipped with a valve of control over the upper inflated packer, and with a valve of control over the lower inflated packer. In the filter there are assembled bottomhole devices connected with rods adjusted in length so, that they can be installed in filters at different depth and with different arrangement. When the facility is lowered to the botttomhole, the filter covers all thickness of the reservoir with the packers. The bottomhole pump creates depression. Information is picked-up along the whole thickness of the reservoir per one trip of the facility; information is transmitted via a cable. Also there are determined degree of reservoir contamination and radius of external boundary of reservoir.

EFFECT: upgraded accuracy of field information on filtration-capacitive characteristics of producing reservoir in process of boring.

2 cl, 1 dwg

 

The invention relates to geological exploration and oil and gas industry and can be used for well testing, research strata during the drilling process.

The known method of hydrodynamic research in open hole modular test layers MTD, including descent by cable in hole open hole modular dynamic formation tester, which allows you to perform the following studies: measurements of reservoir pressure, a record decline curves, and pressure recovery (efficiency and CHP), the sampling of formation fluids. [Hasan Akram, Vladislav Ashurov. A review of hydrodynamic research in open and cased hole modular test layers on the cable MTD/CHDT // Oil and gas review, Spring 2004. - P.30-31.]

For the implementation of the known method uses a device that includes the array module measuring pressure gauges, two-packer module, in which the use of an inflatable packers to isolate the studied interval of the well, the control module flow, controlling flow rate of fluid extraction from the reservoir, the pumping module (pump), allowing you to take the liquid from the reservoir and to pump the fluid into the reservoir, multimemory module with six selected cameras for the selection of representative samples of formation fluids [Hasan Akram, Vladislav Al the ditch. A review of hydrodynamic research in open and cased hole modular test layers on the cable MTD/CHDT // Oil and gas review, Spring 2004. - P.30-31]. It is possible that the configuration of the device depends on the task.

The disadvantages of this method and device are as follows. The MTD size along the length of the device and operations engaged in research in an open wellbore, is limited by the strength of the cable. In addition, there is no possibility of installing the required number of devices throughout the thickness of the reservoir. Therefore, the test well is pointervalue and throughout the thickness of the reservoir, while reducing or eliminating the flow of fluids and drilling mud filtrate, which leads to a distortion of the filtration characteristics of the layers in the determination of the hydrodynamic characteristics of the layer.

There is a method of testing wells, the study of layers associated with the tripping of the tool, creating a deep depression on the formation multicycle call flow of the reservoir fluid and the selection of the deep samples with mandatory registration diagrams of change of pressure and temperature at the bottom hole in the pipe and the definition of hydromechanical parameters [Technical instruction for testing seams tools on the pipes. (RD 153-39.0-062-00) M, 2001].

To implement this method using the device - formation tester for pipes (IPT) [Technical instruction for testing seams tools on the pipes. (RD 153-39.0-062-00) M, 2001]. In the layout device includes: a support Shoe or anchor pipe with pressure gauge and leveling device, the lower packer, a filter, a pipe with pressure gauge, the upper packer, the castle safe, sampler, Iasi, pipe with pressure gauge, formation tester, shutoff valve, circulating valve drill pipe (BT). In this configuration the layout of the device may be different depending on the geological-field tasks, conditions in the test well: breakable rock, the location in the well of the test layer.

A disadvantage of the known method and device is that the test wells in process of drilling conducted on the unsteady mode filter, which differs significantly from the research in the production string, which in principle limits the possibilities of this method. The device which produces the test wells during the drilling process, not sufficiently reliable in operation: leakage of drill pipe, tightening tool during tripping operations, leaky valves and packers, opening the tester valve - all this leads to the floor of the structure poor ARCS and unsatisfactory test results.

The task, which directed the inventive method and device, is to develop a method and device capabilities which ensure reliable operation of individual parts of the layout device for the test wells, the study of strata during the drilling process.

This object is achieved due to the technical result, which is to improve the quality of fishing information on filtration properties (CFP) of the productive formation immediately after opening when drilling through the creation of a new device.

This technical result in the exercise of invention the object of the method is achieved by way of well testing, research strata during the drilling process involves the descent of the drill pipe device with the upper and lower packers, filter, deep-rooted devices and Shoe to the bottom, insulation layers, creating a depression on the formation, selection of deep samples to determine information with mandatory registration diagrams of pressure, temperature and determine the hydrodynamic parameters of the reservoir. During the descent device to the bottom of the filter covers the entire thickness of the reservoir packers. Depression produce deep pump. The withdrawal shall be operated over the entire thickness of the reservoir in a single run-lifting device with eradica information on cable, thus determine the degree of contamination of the reservoir and the radius of the contour of the supply reservoir.

This technical result in the exercise of invention the device object for well testing, research strata during the drilling process contains mounted on a drill pipe layout, consisting of upper and lower packers, underlying instruments, filter and Shoe. Additionally, the device is equipped with deep-well pump for creating a depression in the reservoir, a check valve for pressurization, packers, located above the filter, wash sub located above the check valve, valve, located above the upper packer and connecting the space between the upper and lower packers and the annular space formed by the open wellbore and the drill pipes, packers detected, the control valve upper inflatable packer, a valve controlling the lower inflatable packer. Deep devices are located in the filter and associated adjustable along the length of the rods so that you can place them in the filter at different depths and different layout.

It is claimed arrangement of the device in the process enhances the completeness and quality of the field data due to the ability to cover the entire device layer, and inseparable interval of the formation and conduct long-term tests, what to exclude the flow of fluids and drilling mud filtrate in the formation and charge information in the well pointervalue and throughout the thickness of the reservoir in a single run of the device and to determine the degree of contamination of the reservoir and the power line layer.

The claimed group of inventions complies with the requirement of unity of invention, since form a single inventive concept, one of the declared objects of the group - the device for well testing, research strata during the drilling process is intended to implement another object - of the way. Both object groups aimed at solving the same task for a single technical result.

Work method and device for its implementation is illustrated in the drawing, which shows a device for testing wells, studies of beds in the drilling process.

Device for well testing, research, reservoir while drilling is installed on the BT 1 and contains wash sub 2 below which a check valve 3 and the filter 4. In the upper part of the filter 4 is the upper inflatable packer 5, and in the lower part of the filter 4 is lower inflatable packer 6 administered deep pump 7 through the pressure line 8 and valve 9 controls the upper nduwimana 5 and the valve 10 controls the lower inflatable packer 6. As the valves 9 and 10 can be, for example, used solenoid valves. Pressure line 8 through the valve 11, for example electromagnetic, located above the upper inflatable packer 5, connects mepacrine space 12 with the annular space 13 formed by the open wellbore and BT 1 disclosed in the packers 5 and 6. Deep devices, which use a group of devices, for example: group 14 consisting, for example, pressure gauge, locator continuity, instrument gamma-ray logging, flow meter, hygrometer; group 15 consisting, for example, from the electronic manometer, locator continuity, instrument gamma-ray logging, flow meter and hygrometer; group 16 comprising, for example, from the electronic manometer, thermometer. Group of devices 14, 15, 16 are fixed on the suspension 17 inside the filter 4. Between a group of devices 14, 15, 16 are connected through adjustable along the length of the rods 18. Group of devices 14, 15, 16, submersible pump 7, the valves 9, 10, 11 using armored multi-conductor cable 19 (the cable) are connected with the ground station operational control of well testing and remote reading and data processing (not shown). The cable 19 is included in the filter 4 through the cable connector 20. Ends, the layout device of the Shoe 21.

The method is as follows.

The device p is obivochnym sub 2, a check valve 3, a filter 4 and inflatable packers 5 and 6 put BT 1 in the bore 22 with the open hole to a depth of reservoir testing after opening it a bit with emphasis on the working face of the Shoe 21. Include depth the pump 7, and the reservoir fluid through the pressure line 8, upper and lower valves 9 and 10 is fed in the upper and lower inflatable packers 5 and 6, creating a pressure of 7 MPa in excess of hydrostatic. Then hold Petrovka device.

In order to check the tightness lowered into the well BT 1 and inflatable packers 5 and 6 ground pump units (not shown) create pressure in the annular space 13 formed by the open wellbore 22 and BT 1 disclosed in the packers, at 1.5 times the working pressure. In the absence of circulation of the liquid at the mouth determine the integrity of the inflatable packer 5 and 6, as well as BT 1.

Include depth pump 7 and is pumped out of megaceros space 12 stratiform liquid (wireline fluid), via the pressure line 8 and the valve 11 is fed into the annular space 13. Creates a depression on the layer and call flow of the reservoir fluid. With groups of devices 14, 15, 16, information is transmitted to the ground station operational control cable 19, and samplers group of devices 15 are selected reservoir fluid. Stop pump is 7 close the valve 11 and write the ARC layer 23. When this group of devices 14, 15, 16, sequentially fixed between a threaded adjustable rod 18 in the filter 4 so that overlaps one descent device gas circuit (STC) 24, oil-water circuit (KSS) 25 layer 23 of the bore 22, and not a specific interval of the reservoir 23, and exclude the flow of fluids drilling mud filtrate.

At the same time stop time depth of the pump 7 and the recording ARCS is a lot of time, and to prevent accidental manifestations of the bore 22 in the annular space 13 (for example, sticking the device in an avalanche of rocks) produce flushing of the well 22 through the wash sub 2. When lifting the unit from the well 22 through the wash sub 2 backwashing displace received in the annular space 13 wells 22 stratiform liquid and dump it in the tank outside of the rig.

Therefore, using the appropriate geophysical and hydrodynamic studies and underlying instruments exercise operational control over the process of testing, measuring reservoir pressure, assessment of the mobility of the reservoir fluid, the permeability of the bottom-hole zone and selection of high-quality samples of the reservoir fluid, determine the FES reservoir properties of the formation on the analysis of efficiency and ARCS, the degree of contamination in the s layer and the radius of the contour of the supply reservoir.

After the registration of all data reservoir testing groups of devices 14, 15, 16 open valves 9 and 10, fluid from the upper 5 and lower 6 packers flows through the pressure line 8 through the valve 11 into the annular space 13. Spend raspaculo device, while the working fluid is served in the inner space of the BT 1 at closed return valve 3. The working fluid exits through the flushing adapter 2 into the annular space 13, aligning the drilling fluid. Next, perform a lifting device on the surface of the continuous topping drilling fluid into the annular space 13 of the bore 22.

The use of the proposed group of inventions will improve the quality of information about the FES layers in the drilling process and, consequently, to significantly improve the quality testing of formations in a single run-lifting device, the overlying layers.

1. Method of test wells, the study of strata during the drilling process, including the descent of the drill pipe device with the upper and lower packers, filter, deep-rooted devices and Shoe to the bottom, insulation layers, creating a depression on the formation, selection of deep samples to determine information with mandatory registration diagrams of pressure, temperature and determine the hydrodynamic parameters of the reservoir, characterized in that during the descent of the device is the STV to the bottom of the filter covers the entire thickness of the reservoir packers, depression produce deep pump, removal shall be operated over the entire thickness of the reservoir in a single run-lifting device with data transmission via cable, determine the degree of contamination of the reservoir and the radius of the contour of the supply reservoir.

2. Device for well testing, research strata during the drilling process, containing mounted on a drill pipe layout, consisting of upper and lower packers, underlying instruments, filter and Shoe, characterized in that it further provided with a deep electric pump to create a depression in the reservoir, a check valve for pressurization, packers, located above the filter, wash sub located above the check valve, valve, located above the upper packer and connecting the space between the upper and lower packers and the annular space formed by the open wellbore and the drill pipes, packers detected, the control valve upper inflatable packer, the control valve of the lower inflatable packer, with deep devices connected to the cable, located in the filter and is connected by means of adjustable along the length of the rods so that you can place them in the filter at different depths and in different layout.



 

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14 cl, 3 dwg, 2 ex

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FIELD: oil and gas production.

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8 cl, 1 dwg

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1 dwg

FIELD: oil and gas industry.

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EFFECT: upgraded accuracy of detecting well communication with watered reservoir.

1 ex

FIELD: oil and gas industry.

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36 cl, 4 dwg

FIELD: oil and gas industry.

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EFFECT: upgraded accuracy of measuring oil and water production by means of facilitating direct measurement of oil and water density during well production measuring.

4 cl, 1 dwg

FIELD: oil and gas industry.

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EFFECT: increased efficiency of method due to upgraded customer characteristics of devices used for well yield assessment.

2 cl, 1 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: device has body with ports in lower and upper ends, main sensitive elements in form of turbines and packing elements, placed in pairs at body ends, side port made in body between main sensitive elements and converter, connected to surface equipment. In side pipe, mounted inside the body between main sensitive elements, additional sensitive element is placed in form of turbine and thermal sensor. Lower end of side pipe is connected to side port. Diameter of turbine of additional sensitive element is less than diameter of turbines of main sensitive elements. Converter is a control block mounted above body including sleeves locator and electronic microprocessor device.

EFFECT: higher precision.

1 dwg

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