CN115522920B - Test device for measuring gas-water double-layer perforation exploitation of tight sandstone gas reservoir - Google Patents
Test device for measuring gas-water double-layer perforation exploitation of tight sandstone gas reservoir Download PDFInfo
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- CN115522920B CN115522920B CN202211479603.5A CN202211479603A CN115522920B CN 115522920 B CN115522920 B CN 115522920B CN 202211479603 A CN202211479603 A CN 202211479603A CN 115522920 B CN115522920 B CN 115522920B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 147
- 238000012360 testing method Methods 0.000 title claims abstract description 45
- 239000007788 liquid Substances 0.000 claims abstract description 53
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000000203 mixture Substances 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 abstract description 15
- 230000008569 process Effects 0.000 abstract description 13
- 238000005259 measurement Methods 0.000 abstract description 5
- 230000008859 change Effects 0.000 description 4
- 239000011435 rock Substances 0.000 description 4
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- 238000005065 mining Methods 0.000 description 3
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- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
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Abstract
The invention discloses a test device for measuring gas-water double-layer perforation exploitation of a tight sandstone gas reservoir, wherein a gas-liquid collecting cylinder is sequentially connected with a second liquid flow meter, a fifth ball valve and a gas-liquid mixture outlet, a fourth ball valve is connected with the second ball valve in parallel and then sequentially connected with a pressure gauge, a booster pump and a methane gas cylinder, a first ball valve is connected with a third ball valve in parallel and then sequentially connected with a first liquid flow meter, a water pump and a water storage tank, one side of the fourth ball valve is connected with a gas inlet, the other side of the fourth ball valve is connected with the second ball valve in parallel, one side of the first ball valve is connected with a water inlet, and the other side of the first ball valve is connected with the third ball valve in parallel; the telescopic pipe is provided with a telescopic controller, one end of the telescopic controller is connected with the telescopic pipe, the other end of the telescopic controller is connected with the data control system, the telescopic pipe is positioned at the inner wall of the sleeve, and the data control system sends an instruction to the telescopic controller so as to control the telescopic pipe to perform up-and-down telescopic motion. The method can truly simulate the gas-water double-layer perforation exploitation process of the tight sandstone gas reservoir under the actual working condition, and the measurement result is accurate.
Description
Technical Field
The invention belongs to the technical field of measuring devices, and particularly relates to a testing device for measuring gas-water double-layer perforation exploitation of a tight sandstone gas reservoir.
Background
Tight sandstone gas reservoirs are so-called low permeability gas reservoirs in clastic rock. Tight sandstone gas reservoirs often have geological characteristics of low permeability, strong heterogeneity, low porosity, higher water saturation, complex gas-water relationship, and the like. In the process of exploiting the tight sandstone gas reservoir, due to the complexity of the gas-water relationship of the gas-water reservoir at the bottom of the well and the vertical contact of the gas, the water and the rock stratum, two-phase seepage between the gas layer and the water layer can be generated in the process of exploitation, and the process mainly occurs when exploitation is carried out after perforation is finished. If in large-scale conventional development, water in the water layer enters the gas layer along the pores of the tight sandstone under the action of pressure due to the seepage effect between the gas layer and the water layer, the phenomenon of water seepage in the gas layer can be caused, and in severe cases, the difference of water production and gas production characteristics of adjacent gas wells is large, even water is produced when the gas wells are put into production, and the effective development of the tight sandstone gas reservoir is influenced. Therefore, the problem to be solved by the scheme is how to change the gas layer and the water layer after the seepage of the gas layer and the water layer occurs in the process of exploiting the tight sandstone gas reservoir and how to realize the seepage of the water layer to the gas layer.
Disclosure of Invention
The invention aims to: the invention provides a test device for measuring gas-water double-layer perforation exploitation of a tight sandstone gas reservoir, which is used for measuring the change condition of water layer seepage to a gas layer under different pressure conditions in the exploitation process of the tight sandstone gas reservoir.
The purpose of the invention is realized by the following technical scheme:
the utility model provides a measure test device of tight sandstone gas reservoir gas water double-deck perforation exploitation, includes test box and sleeve pipe, and the sleeve pipe stretches into in the test box, and the box inner chamber divide into cavity and lower cavity through tight sandstone rock stratum, is equipped with the foraminiferous pipe that feeds through sleeve pipe inner chamber and last cavity, lower cavity on the sleeve pipe, and lower cavity and water supply pressure subassembly intercommunication go up the cavity and feed gas pressure subassembly intercommunication, are equipped with perforation on the foraminiferous pipe and lead to the closed subassembly, and the sleeve pipe inner chamber communicates with the gas-liquid collection subassembly.
Furthermore, the circular pipes with holes in the upper cavity and the lower cavity are arranged in an up-and-down symmetrical mode, and the circular pipes with holes on the two sides of the sleeve are arranged in a left-and-right symmetrical mode.
Furthermore, one end of the sleeve is inserted into the bottom of the test box from the middle of the test box, and the contact part of the sleeve and the test box is subjected to sealing treatment (not shown in the figure), which belongs to the prior art and is not described herein again. The sleeve is made of X80 steel and used for simulating the sleeve under actual working conditions, belongs to the prior art and is not described herein again.
Further, the circular tube with the holes is a hollow circular tube, and a plurality of circular holes with the left and right spacing of 1mm, the front and back spacing of 10mm and the diameter of 1mm are arranged on the circular tube, and the circular tube with the holes belongs to the prior art and is not described herein again.
Furthermore, a first pressure sensor is arranged in the lower cavity, a second pressure sensor is arranged in the upper cavity, a third pressure sensor is arranged in the inner cavity of the sleeve, and the first pressure sensor, the second pressure sensor and the third pressure sensor are all connected with the data control system.
Furthermore, the water supply pressurizing assembly comprises a water supply inlet pipe and a water supply circulating pipe, a water storage tank and a water pump are sequentially arranged on the water supply inlet pipe along the water flow direction, the water supply inlet pipe is connected with a water inlet on the test box body, the water supply circulating pipe is connected with a water outlet on the test box body, the water inlet and the water outlet are communicated to the lower cavity body, and the water supply circulating pipe is connected with a water outlet end of the water supply inlet pipe.
Furthermore, the water inlet is communicated to the bottom of the lower cavity, and the water outlet is communicated to the top of the lower cavity, so that the whole lower cavity is filled with water.
Furthermore, the water supply inlet pipe is sequentially provided with a water storage tank, a water pump, a first liquid flow meter and a first ball valve along the water flow direction, the water supply circulating pipe is provided with a third ball valve, and the water supply circulating pipe is connected to the position between the first liquid flow meter and the first ball valve on the water supply inlet pipe. The water outlet forms a circulation loop with the third ball valve, the first ball valve and the water inlet in sequence.
Further, the air feed pressurization subassembly advance pipe and air feed circulating pipe including the air feed, the air feed advances to be equipped with methane gas cylinder and force (forcing) pump in proper order along the air current direction on the pipe, the air feed advances the pipe and is connected with the gas feed inlet on the experimental box, the gas outlet on air feed circulating pipe and the experimental box is connected, gas feed inlet and gas outlet all communicate to in the epicoele, the gas circulating pipe advances the end of giving vent to anger of pipe with gas and is connected.
Further, the air supply inlet pipe on be equipped with methane gas cylinder, force (forcing) pump, manometer and fourth ball valve along the air current direction in proper order, be equipped with the second ball valve on the air supply circulating pipe, the air supply circulating pipe is connected to the air supply inlet pipe and goes up the position between manometer and the fourth ball valve. The gas outlet forms a circulation loop with the second ball valve, the fourth ball valve and the gas inlet in sequence.
Furthermore, the perforation opening and closing assembly comprises a telescopic pipe and a telescopic controller, the data control system is connected with the telescopic controller, the telescopic controller is connected with the telescopic pipe, the telescopic pipe is located in the sleeve, and the pipe wall opening of the circular pipe with the hole is opened and closed through the telescopic motion of the telescopic pipe.
The circular pipe with the hole is used for simulating a gas-liquid flow channel formed after perforation under the actual working condition. The telescopic controller is positioned in the middle of the sleeve and is used for controlling the telescopic pipe to extend and retract up and down in the sleeve. When the telescopic pipe is upwards contracted to a position higher than the highest circular pipe with a hole in the upper cavity, the simulated perforation is completed, and exploitation is carried out. The extension tube extends downwards to the bottom of the test box body to prevent air and water from flowing into the sleeve, and perforation is not performed at the moment.
Furthermore, the gas-liquid collecting assembly comprises a collecting pipe, an end connector is arranged on the sleeve, a gas-liquid mixture outlet is arranged on the end connector and connected with the collecting pipe, and a fifth ball valve, a second liquid flowmeter and a gas-liquid collecting cylinder are sequentially arranged on the collecting pipe along the gas-liquid flowing direction.
Furthermore, the tight sandstone stratum is fixed in the test box body through a support column.
Further, the first ball valve, the second ball valve, the third ball valve, the fourth ball valve and the fifth ball valve are the same ball valves, which belong to the prior art and are not described herein again. The first pressure sensor, the second pressure sensor and the third pressure sensor are the same pressure sensor, belong to the prior art, and are not described herein again. Manometer, water pump, force (forcing) pump, water storage tank, gas-liquid collecting cylinder, first fluidflowmeter, second fluidflowmeter belong to prior art, and no longer give unnecessary details here.
The invention has the beneficial effects that:
(1) Through setting up flexible controller and flexible pipe, when flexible pipe downwardly extending to the bottom, prevent that methane gas and water from getting into in the cover in advance.
(2) The perforated circular pipe is arranged to simulate a gas-liquid flow channel after perforation is completed under the actual working condition, and the simulation effect is good.
(3) By arranging the three pressure sensors, the pressure in the whole measuring process can be accurately measured.
(4) The water outlet is arranged at the left upper part of the lower cavity, and the water inlet is arranged at the right lower part of the lower cavity, so that the lower cavity can be always filled with water.
(5) The method can truly simulate the gas-water double-layer perforation exploitation process of the tight sandstone gas reservoir under the actual working condition, obtain the change rule of the liquid level in the upper cavity, has accurate measurement result, and has guiding significance for carrying out gas-water double-layer perforation exploitation on the tight sandstone gas reservoir under the actual working condition on site.
The main scheme and the further selection schemes can be freely combined to form a plurality of schemes which are all adopted and claimed by the invention; in the invention, the selection (each non-conflict selection) and other selections can be freely combined. The skilled person in the art can understand various combinations according to the prior art and the common general knowledge after understanding the solution of the present invention, and the combinations are all the technical solutions to be protected by the present invention, and are not exhaustive here.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural diagram of the telescopic controller in fig. 1 after controlling the telescopic tube to be lifted.
FIG. 3 is a graph of initial upper chamber pressure plotted against the mean of the first and second pressure sensor recordings.
Figure 4 is a graph of upper chamber body initial pressure versus upper chamber body liquid level.
In the figure: 1. the device comprises a water storage tank, 2. A water pump, 3. A first liquid flow meter, 4. A first ball valve, 5. A water inlet, 6. A second ball valve, 7. A third ball valve, 8. A lower cavity, 9. A first pressure sensor, 10. A water outlet, 11. A tight sandstone stratum, 12. A gas inlet, 13. A methane gas cylinder, 14. A pressure pump, 15. A pressure gauge, 16. A fourth ball valve, 17. A test box body, 18. A second pressure sensor, 19. A circular pipe with holes, 20. A gas outlet, 21. An upper cavity, 22. A telescopic pipe, 23. A telescopic controller, 24. A sleeve, 25. A data control system, 26. A third pressure sensor, 27. An end joint, 28. A gas-liquid mixture outlet, 29. A fifth ball valve, 30. A second liquid flow meter, 31. A gas-liquid collecting cylinder and 32. A support column.
Detailed Description
The following non-limiting examples serve to illustrate the invention.
Example 1:
referring to fig. 1 to 4, the test device for measuring gas-water double-layer perforation exploitation of the tight sandstone gas reservoir comprises a test main body, a water supply pressurizing assembly, a gas supply pressurizing assembly, a perforation opening and closing assembly and a gas-liquid collecting assembly.
The test main body comprises a water inlet 5, a lower cavity 8, a first pressure sensor 9, a water outlet 10, a tight sandstone stratum 11, a gas inlet 12, a test box body 17, a second pressure sensor 18, a perforated circular pipe 19, a gas outlet 20, an upper cavity 21, a sleeve 24, a third pressure sensor 26 and a support column 32.
The test box body 17 is of a rectangular structure, the lower end of the sleeve 24 extends into the center of the test box body 17, the lower end of the sleeve is fixed with the bottom of the box body in a sealing mode, the inner cavity of the box body of the test box body 17 is divided into an upper cavity 21 and a lower cavity 8 through the tight sandstone stratum 11, and the sleeve 24 is provided with a circular pipe 19 with holes, and the inner cavity of the sleeve 24 is communicated with the upper cavity 21 and the lower cavity 8.
The lower cavity 8 is communicated with a water supply pressurizing assembly, the upper cavity 21 is communicated with an air supply pressurizing assembly, a perforated circular tube 19 is provided with a perforated through-closing assembly, and the inner cavity of the sleeve is communicated with a gas-liquid collecting assembly.
The perforated circular pipes 19 in the upper cavity 21 and the lower cavity 8 are arranged in an up-and-down symmetrical manner, and the perforated circular pipes 19 on the two sides of the sleeve 24 are arranged in a left-and-right symmetrical manner. 12 circular pipes 19 with holes are arranged in the test box body 17, are arranged in a bilateral symmetry mode, are respectively 6 on the left side and the right side of the sleeve 24, and are respectively 6 on the upper side and the lower side of the tight sandstone stratum 11.
The tight sandstone formation 11 is fixed to the middle of the test tank 17 by a support column 32. The left upper part of the lower cavity 8 is provided with a water outlet 10, the right lower part is provided with a water inlet 5, and the two parts have the same size. The middle part of the right side of the upper cavity 21 is provided with a gas inlet 12, the middle part of the left side thereof is provided with a gas outlet 20, and the two are the same in size.
The lower left corner of the lower cavity 8 is provided with a first pressure sensor 9, the lower left corner of the upper cavity 21 is provided with a second pressure sensor 18, the upper left corner of the inner cavity of the sleeve is provided with a third pressure sensor 26, and the first pressure sensor 9, the second pressure sensor 18 and the third pressure sensor 26 are all connected with a data control system 25.
The water supply pressurizing assembly comprises a water supply inlet pipe, a water supply circulating pipe, a water storage tank 1, a water pump 2, a first liquid flow meter 3, a first ball valve 4 and a third ball valve 7.
The water supply inlet pipe is sequentially provided with a water storage tank 1, a water pump 2, a first liquid flowmeter 3 and a first ball valve 4 along the water flow direction, the water supply inlet pipe is connected with a water inlet 5 on the test box body 17, and the water supply circulating pipe is connected with a water outlet 10 on the test box body 17. The water inlet 5 and the water outlet 10 are communicated to the inside of the lower cavity 8, the water inlet 5 is communicated to the bottom of the lower cavity 8, and the water outlet 10 is communicated to the top of the lower cavity 8. A third ball valve 7 is arranged on the water supply circulating pipe, and the water supply circulating pipe is connected to the position between the first liquid flowmeter 3 and the first ball valve 4 on the water supply inlet pipe.
The gas supply pressurizing assembly comprises a gas supply inlet pipe, a gas supply circulating pipe, a methane gas bottle 13, a pressurizing pump 14, a pressure gauge 15, a fourth ball valve 16 and a second ball valve 6.
The methane gas bottle 13, the booster pump 14, the pressure gauge 15 and the fourth ball valve 16 are sequentially arranged on the gas supply inlet pipe along the gas flow direction, the gas supply inlet pipe is connected with a gas inlet 12 on the test box body 17, the gas supply circulating pipe is connected with a gas outlet 20 on the test box body 17, the gas inlet 12 and the gas outlet 20 are both communicated into the upper cavity 21, the second ball valve 6 is arranged on the gas supply circulating pipe, and the gas supply circulating pipe is connected to the position between the pressure gauge 15 and the fourth ball valve 16 on the gas supply inlet pipe.
The perforation closure assembly includes telescoping tubes 22, telescoping controller 23 and data control system 25. The data control system 25 is connected with the telescopic controller 23, the telescopic controller 23 is connected with the telescopic pipe 22, the telescopic pipe 22 is positioned in the sleeve pipe 24, and the pipe wall opening of the circular pipe 19 with the hole is opened and closed through the telescopic motion of the telescopic pipe 22. The telescopic tube 22 is located at the inner wall of the casing 24, and sends an instruction to the telescopic controller 23 through the data control system 25, so as to control the telescopic tube 22 to perform up-and-down telescopic movement.
The gas-liquid collection assembly comprises a collection pipe, an end joint 27, a gas-liquid mixture outlet 28, a fifth ball valve 29, a second liquid flow meter 30 and a gas-liquid collection cylinder 31.
The upper port of the sleeve 24 is provided with a detachable end joint 27, the end joint 27 is provided with a gas-liquid mixture outlet 28, the gas-liquid mixture outlet 28 is connected with a collecting pipe, and the collecting pipe is sequentially provided with a fifth ball valve 29, a second liquid flowmeter 30 and a gas-liquid collecting cylinder 31 along the gas-liquid flowing direction.
The measuring device aims to change the pressure values in the upper cavity 21 and the lower cavity 8 under the condition that the initial pressures of the upper cavity 21 and the lower cavity 8 are always kept to be different by 0.5MPa by adjusting the discharge capacities of the water pump 2 and the pressure pump 14, simulate the mining process after the perforation is finished by upwards shrinking the telescopic pipe 22, and simulate the height of water permeating in the upper cavity 21 after a period of time. The gas layer in the upper cavity 21 and the water layer in the lower cavity 8 are always in a circulating state in the whole mining process.
The pressure in the upper cavity 21 is set according to 3MPa, 4MPa, 5MPa and 6MPa, and the pressure in the lower cavity 8 is set according to 3.5MPa, 4.5MPa, 5.5MPa and 6.5MPa, and the setting is consistent with the situation that the pressure is higher towards the ground under the actual working condition.
Referring to fig. 1, a schematic structural diagram of a test device for measuring gas-water double-layer perforation exploitation of a tight sandstone gas reservoir according to the present invention is shown, when measurement is performed, all valves are closed, a telescopic pipe 22 is in an extended state, a water storage tank 1, a water pump 2, a first ball valve 4, and a third ball valve 7 are opened in sequence, so that water in the water storage tank 1 is pressurized by the water pump 2, a first liquid flow meter 3 meters and then enters a lower cavity 8 from a water inlet 5 through the first ball valve 4, the water is filled on a liquid level in the lower cavity 8 from bottom to top, and finally flows out from a water outlet 10 and enters the lower cavity 8 from the water inlet 5 through the third ball valve 7 for circulation.
And then, opening the methane gas bottle 13, the booster pump 14, the fourth ball valve 16 and the second ball valve 6 in sequence to pressurize the methane gas in the methane gas bottle 13 through the booster pump 14, metering by the pressure gauge 15, passing through the fourth ball valve 16, entering the upper cavity 21 from the gas inlet 12, moving the methane gas from right to left, finally flowing out from the gas outlet 20, passing through the second ball valve 6, entering the upper cavity 21 from the gas inlet 12 for circulation.
The pressures displayed by the first pressure sensor 9 and the second pressure sensor 18 in the data control system 25 are respectively 3.5MPa and 3MPa by respectively adjusting the discharge capacities of the water pump 2 and the pressure pump 14, and the non-perforation stage of the tight sandstone gas reservoir is produced under the simulated actual working condition.
And then, in the simulated perforation stage, the fifth ball valve 29 and the gas-liquid collecting cylinder 31 are opened, and the data control system 25 transmits instructions to the telescopic controller 23, so that the telescopic pipe 22 is controlled by the telescopic controller 23 to be quickly contracted upwards to the position shown in fig. 2, and the perforation under the simulated actual working condition is finished. During the process of rapid upward contraction of the telescopic pipe 22, firstly, water in the lower cavity 8 enters the sleeve 24, and then, methane gas in the upper cavity 21 enters the sleeve 24; the mixture of methane gas and water flows out from the gas-liquid mixture outlet 28, is finally metered by the fifth ball valve 29 and the second liquid flow meter 30 and then enters the gas-liquid collecting cylinder 31 for collection, and the mining process under the actual working condition is simulated at the moment.
When the bellows 22 is rapidly retracted upward to the position of fig. 2, a 3-minute timer is started, the inner casing 24 continuously produces methane gas and water for 3 minutes, the values of the first pressure sensor 9 and the second pressure sensor 18 for the 3 minutes are recorded in the data control system 25, and the average value of the pressures recorded in the 3 minutes is taken as the measured result. And after 3 minutes, closing the methane gas bottle 13, the water storage tank 1, the water pump 2, the booster pump 14, the fourth ball valve 16, the third ball valve 7, the first ball valve 4 and the second ball valve 6 in sequence, and closing the fifth ball valve 29 after the pressure values displayed by the three pressure sensors in the data control system 25 are 0. Opening the upper box cover of the test box body 17, measuring the liquid level height in the upper cavity 21 and at the upper part of the tight sandstone rock stratum 11, and recording; and simultaneously, the pressure values transmitted by the second pressure sensor 18 and the first pressure sensor 9 in the measuring process are recorded and displayed on the data control system 25.
And then repeating the steps, and when the discharge capacities of the water pump 2 and the pressure pump 14 are adjusted, enabling the pressures displayed by the first pressure sensor 9 and the second pressure sensor 18 in the data control system 25 to be respectively a group according to 4.5MPa and 4MPa, a group according to 5.5MPa and 5MPa, and a group according to 6.5MPa and 6MPa, and repeating the steps and making corresponding records respectively, so that the steps are the same and are not repeated.
The results of the above measurement records are summarized in the following table:
referring to fig. 3, a graph of the relationship between the initial pressure of the upper chamber and the average values recorded by the first and second pressure sensors in the above table is shown, from which: along with the increase of the initial pressure of the upper cavity, the average numerical values recorded by the first pressure sensor and the second pressure sensor also increase, and the whole is in positive correlation; when the initial pressure of the upper cavity is 4MPa, the average value recorded by the second pressure sensor has the phenomenon of increasing trend and steepening the slope; when the initial pressure of the upper cavity is 5MPa, the average value recorded by the second pressure sensor has the phenomenon of slowing down the increasing trend, and the slope of the average value becomes slow.
Referring to fig. 4, a graph of initial upper chamber pressure versus upper chamber liquid level in the table above is shown, from which: along with the rise of the initial pressure of the upper cavity, the liquid level in the upper cavity also rises, and the whole body presents positive correlation; when the initial pressure of the upper cavity is 4MPa, the slope becomes steep; when the initial pressure of the upper cavity is 5MPa, the slope is reduced; this phenomenon is the same as the pressure variation trend in fig. 3.
Therefore, the gas-water double-layer perforation exploitation measurement result of the tight sandstone gas reservoir obtained by the testing device of the invention provides guiding significance for gas-water double-layer perforation exploitation of the tight sandstone gas reservoir on site.
The foregoing basic embodiments of the invention and their various further alternatives can be freely combined to form multiple embodiments, all of which are contemplated and claimed herein. In the scheme of the invention, each selection example can be combined with any other basic example and selection example at will.
The above description is intended to be illustrative of the preferred embodiment of the present invention and should not be taken as limiting the invention, but rather, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.
Claims (4)
1. The utility model provides a measure test device of tight sandstone gas reservoir gas-water double-deck perforation exploitation, includes test box (17) and sleeve pipe (24), its characterized in that: the sleeve (24) extends into the test box body (17), the inner cavity of the box body is divided into an upper cavity (21) and a lower cavity (8) through a tight sandstone stratum (11), a perforated circular tube (19) which is used for communicating the inner cavity of the sleeve with the upper cavity (21) and the lower cavity (8) is arranged on the sleeve (24), the lower cavity (8) is communicated with a water supply pressurizing assembly, the upper cavity (21) is communicated with a gas supply pressurizing assembly, a perforation open-close assembly is arranged on the perforated circular tube (19), and the inner cavity of the sleeve is communicated with a gas-liquid collecting assembly;
the perforated circular pipes (19) in the upper cavity (21) and the lower cavity (8) are arranged in an up-down symmetrical mode, and the perforated circular pipes (19) on the two sides of the sleeve (24) are arranged in a left-right symmetrical mode;
a first pressure sensor (9) is arranged in the lower cavity (8), a second pressure sensor (18) is arranged in the upper cavity (21), a third pressure sensor (26) is arranged in the inner cavity of the sleeve, and the first pressure sensor (9), the second pressure sensor (18) and the third pressure sensor (26) are all connected with a data control system (25);
the water supply pressurizing assembly comprises a water supply inlet pipe and a water supply circulating pipe, a water storage tank (1) and a water pump (2) are sequentially arranged on the water supply inlet pipe along the water flow direction, the water supply inlet pipe is connected with a water inlet (5) on the test box body (17), the water supply circulating pipe is connected with a water outlet (10) on the test box body (17), the water inlet (5) and the water outlet (10) are communicated into the lower cavity (8), and the water supply circulating pipe is connected with the water outlet end of the water supply inlet pipe;
the water inlet (5) is communicated to the bottom of the lower cavity (8), and the water outlet (10) is communicated to the top of the lower cavity (8);
the gas supply and pressurization assembly comprises a gas supply inlet pipe and a gas supply circulating pipe, wherein a methane gas bottle (13) and a pressurization pump (14) are sequentially arranged on the gas supply inlet pipe along the gas flow direction, the gas supply inlet pipe is connected with a gas inlet (12) on the test box body (17), the gas supply circulating pipe is connected with a gas outlet (20) on the test box body (17), the gas inlet (12) and the gas outlet (20) are both communicated into the upper cavity (21), and the gas circulating pipe is connected with the gas outlet end of the gas supply inlet pipe;
the perforation opening and closing assembly comprises a telescopic pipe (22) and a telescopic controller (23), a data control system (25) is connected with the telescopic controller (23), the telescopic controller (23) is connected with the telescopic pipe (22), the telescopic pipe (22) is located in a sleeve (24), and a pipe wall opening of the circular pipe with the hole (19) is opened and closed through telescopic motion of the telescopic pipe (22).
2. The test device for measuring gas-water double-layer perforation exploitation of the tight sandstone gas reservoir according to claim 1, wherein the test device is characterized in that: the water supply inlet pipe is sequentially provided with a water storage tank (1), a water pump (2), a first liquid flowmeter (3) and a first ball valve (4) along the water flow direction, the water supply circulating pipe is provided with a third ball valve (7), and the water supply circulating pipe is connected to the position between the first liquid flowmeter (3) and the first ball valve (4) on the water supply inlet pipe.
3. The test device for measuring gas-water double-layer perforation exploitation of the tight sandstone gas reservoir according to claim 1, wherein the test device comprises: the methane gas supply device is characterized in that the gas supply inlet pipe is sequentially provided with a methane gas bottle (13), a pressure pump (14), a pressure gauge (15) and a fourth ball valve (16) along the direction of gas flow, the gas supply circulating pipe is provided with a second ball valve (6), and the gas supply circulating pipe is connected to the position between the pressure gauge (15) and the fourth ball valve (16) on the gas supply inlet pipe.
4. The test device for measuring gas-water double-layer perforation exploitation of the tight sandstone gas reservoir according to claim 1, wherein the test device comprises: the gas-liquid collecting assembly comprises a collecting pipe, an end connector (27) is arranged on the sleeve (24), a gas-liquid mixture outlet (28) is arranged on the end connector (27), the gas-liquid mixture outlet (28) is connected with the collecting pipe, and a fifth ball valve (29), a second liquid flowmeter (30) and a gas-liquid collecting cylinder (31) are sequentially arranged on the collecting pipe along the gas-liquid flowing direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211479603.5A CN115522920B (en) | 2022-11-24 | 2022-11-24 | Test device for measuring gas-water double-layer perforation exploitation of tight sandstone gas reservoir |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211479603.5A CN115522920B (en) | 2022-11-24 | 2022-11-24 | Test device for measuring gas-water double-layer perforation exploitation of tight sandstone gas reservoir |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115522920A CN115522920A (en) | 2022-12-27 |
| CN115522920B true CN115522920B (en) | 2023-02-10 |
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