CN211777357U - Multi-section pressure measurement water-air alternate oil extraction experimental device for CT scanning - Google Patents
Multi-section pressure measurement water-air alternate oil extraction experimental device for CT scanning Download PDFInfo
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Abstract
The utility model discloses a multi-section pressure measurement water-air alternate oil extraction experimental device for CT scanning, wherein a rock core sample is arranged in an inner cavity of a seepage cavity, two ends of the rock core sample are respectively provided with a front end cap of the seepage cavity and a rear end cap of the seepage cavity, the exterior of the rock core sample, the front end cap of the seepage cavity and the rear end cap of the seepage cavity are coated with a rock coating sleeve, and two ends of the seepage cavity are respectively provided with a seepage cavity injection port and a liquid discharge port; a confining pressure valve and a confining pressure liquid discharge valve are arranged on the seepage cavity, and a liquid injection pump is connected to the confining pressure valve; the water injection system and the gas injection system are both connected with the injection port of the seepage cavity, and the liquid discharge port of the seepage cavity is connected with the metering system; the pressure data acquisition system comprises a plurality of pressure sensors distributed along the length direction of the core sample, and the pressure sensors are used for detecting the pressure of different positions of the core sample. The utility model discloses can be used to evaluate the interior fluid pressure conduction law of rock and the remaining oil distribution characteristic under the effect, provide important experimental basis for the design of mining site oil recovery process parameter.
Description
Technical Field
The utility model belongs to the oil recovery engineering field, concretely relates to CT is multistage pressure measurement aqueous vapor oil recovery experimental apparatus in turn for scanning.
Background
At present, a large amount of residual oil in old oil fields in China is dispersed in underground reservoirs, and exploration of the old oil field potential excavation technology has important significance for stable yield of crude oil in China.
Compared with a single water injection development oil recovery mode, the water injection-gas alternative oil recovery mode is more favorable for improving the oil reservoir recovery rate, a physical experiment for water and gas alternative oil recovery by using a core sample is a main means for evaluating the water and gas alternative oil recovery rate, however, the pore structure of the core sample is complex, and the fluid pressure conduction rule in rock and the distribution characteristics of residual oil under the action of the fluid pressure conduction rule are not clear in the water and gas energy supplement process, so that the field water and gas alternative injection oil recovery process design lacks fine basis.
SUMMERY OF THE UTILITY MODEL
For solving the problem that exists among the prior art, the utility model provides a CT scanning is with multistage pressure measurement aqueous vapor oil recovery experimental apparatus in turn, the utility model discloses utilize CT scanning's visual formation of image and multistage pressure measurement technique to combine together, but the systematic research water-gas replenishment energy in-process, the remaining oil distribution characteristic under fluid pressure conduction law and its effect in the rock provides meticulous experiment foundation for on-the-spot steam is handed over notes oil recovery process design.
The utility model adopts the following technical scheme:
a multi-section pressure measurement water-gas alternative oil extraction experimental device for CT scanning comprises a water injection system, a gas injection system, a rock seepage system, a pressure data acquisition system and a metering system, wherein the rock seepage system comprises a rock core sample and a seepage cavity, the rock core sample is arranged in an inner cavity of the seepage cavity, two ends of the rock core sample are respectively provided with a front plug of the seepage cavity and a rear plug of the seepage cavity, the exterior of the rock core sample, the front plug of the seepage cavity and the exterior of the rear plug of the seepage cavity are respectively coated with a rock coating sleeve, two ends of the seepage cavity are respectively provided with a seepage cavity injection port and a seepage cavity liquid discharge port, the front plug of the seepage cavity and the rear plug of the seepage cavity are respectively sealed with two ends of the seepage cavity, a first channel is arranged on the front plug of the seepage cavity, one end of the first channel is communicated with the seepage cavity injection port, and the other end of the first, a second channel is formed in the plug behind the seepage cavity, one end of the second channel is communicated with a liquid discharge port of the seepage cavity, and the other end of the second channel extends to the other end of the core sample; a confining pressure valve and a confining pressure liquid discharge valve are arranged on the seepage cavity, and a liquid injection pump is connected to the confining pressure valve; the water injection system and the gas injection system are both connected with the injection port of the seepage cavity, and the liquid discharge port of the seepage cavity is connected with the metering system; the pressure data acquisition system comprises a plurality of pressure sensors distributed along the length direction of the core sample, and the pressure sensors are used for detecting the pressure of different positions of the core sample.
The injection port of the seepage cavity is connected with a six-way valve, and the water injection system and the gas injection system are both connected with the six-way valve.
The water injection system comprises a constant-speed pump and a liquid intermediate container, wherein an outlet of the constant-speed pump is connected with an inlet of the liquid intermediate container, a liquid control valve is arranged on a pipeline connecting the constant-speed pump and the inlet of the liquid intermediate container, and an outlet of the liquid intermediate container is connected with an injection port of the seepage cavity.
The gas injection system comprises a gas cylinder and a gas intermediate container, the outlet of the gas cylinder is connected with the inlet of the gas intermediate container, the outlet of the gas intermediate container is connected with the injection port of the seepage cavity, a gas control valve is arranged on a pipeline for connecting the outlet of the gas cylinder with the inlet of the gas intermediate container, and a pressure gauge is arranged at the outlet of the gas intermediate container.
The seepage cavity is arranged on the fixed base.
And the confining pressure liquid discharge valve is arranged at the upper part of the seepage cavity.
The pressure sensor is arranged on the rock coating sleeve and penetrates through the seepage cavity, and the pressure sensor and the seepage cavity are sealed.
The pressure sensor is connected with the pressure data collector, and the pressure data collector is connected with the computer.
The metering system comprises a back pressure valve and a measuring cylinder, an inlet of the back pressure valve is connected with a seepage cavity liquid outlet, and the measuring cylinder is arranged at an outlet of the back pressure valve.
The utility model discloses following beneficial effect has:
the utility model discloses a CT scanning is with multistage pressure measurement aqueous vapor alternating oil production experimental apparatus sets up confined pressure valve and confined pressure flowing back valve on the seepage flow cavity, connect the filling pump on the confined pressure valve, consequently utilize confined pressure valve, confined pressure flowing back valve and filling pump can realize exerting the confined pressure to the rock core sample, at the outside cladding rock sheathing of rock core sample, seepage flow cavity the place ahead end cap and seepage flow cavity rear end cap, the rock sheathing can make the annular space between rock core sample and the seepage flow cavity separate, guaranteed not to influence the gas injection and the water injection process of rock core sample when exerting the confined pressure; the water injection system and the gas injection system are arranged to alternately perform gas injection and water injection on the core sample; the structure ensures that water or gas injected by a water injection system and a gas injection system can be injected from one end of a core sample and flows out from the other end of the core sample, and realizes the simulation of gas injection and water injection oil extraction processes; the pressure data acquisition system is used for acquiring pressure data of different parts of the core sample, and the metering system is used for measuring the oil production in the gas injection and water injection processes; through scanning the utility model discloses a distribution state of crude oil in the rock core sample can be obtained to the seepage flow cavity. Therefore the utility model discloses a CT scanning is with multistage pressure measurement aqueous vapor oil recovery experimental apparatus in turn can be used for studying water-gas complementary energy in-process, and fluid pressure conduction law and the remaining oil distribution characteristic under the effect in the rock provide meticulous experimental foundation for on-the-spot aqueous vapor notes oil recovery process design.
Furthermore, be connected with the six-way valve on the seepage flow cavity filling opening, water injection system and gas injection system all are connected with the six-way valve, make things convenient for the switching of gas injection and water injection circuit through the six-way valve, convenient operation is favorable to improving the efficiency of experiment.
Furthermore, set up container in the middle of the liquid in the water injection system, container can play certain cushioning effect in the middle of the liquid for the water injection process is stable, prevents to cause the impact damage of rock core sample and constant speed pump because of the pressure sudden change.
Further, set up gaseous intermediate container among the gas injection system, gaseous intermediate container can play certain cushioning effect for the gas injection process is stable, prevents to cause the damage of rock core sample because of the pressure sudden change. And secondly, the volume of the injected gas can be converted through a state equation by reading change of a pressure gauge arranged at the outlet of the intermediate container, and the injection amount of the injected gas can be controlled.
Furthermore, the seepage cavity is installed in unable adjustment base, can guarantee the stability and the reliability of seepage cavity installation through unable adjustment base, guarantees the safety of experimentation.
Furthermore, the confining pressure liquid discharge valve is arranged at the upper part of the seepage cavity, so that the gas in the seepage cavity can be discharged.
Drawings
Fig. 1 is the structure schematic diagram of the multi-stage pressure measurement water-gas alternative oil extraction experimental device for CT scanning.
In the figure, 1-gas cylinder, 2-gas control valve, 3-gas intermediate container, 4-pressure gauge, 5-six-way valve, 6-constant speed pump, 7-liquid control valve, 8-liquid intermediate container, 9-seepage cavity injection port, 10-first pressure sensor, 11-second pressure sensor, 12-third pressure sensor, 13-fourth pressure sensor, 14-fifth pressure sensor, 15-confining pressure valve, 16-liquid injection pump, 17-seepage cavity liquid discharge port, 18-seepage cavity rear plug, 18-1-second channel, 19-core sample, 20-confining pressure liquid discharge valve, 21-confining pressure liquid discharge valve plug, 22-fixed base, 23-rock coating sleeve, 24-seepage cavity, 25-a front plug of a seepage cavity, 25-1-a first channel, 26-a back pressure valve, 27-a measuring cylinder, 28-a pressure data collector, 29-a computer and 30-a pressure data collecting system.
Detailed Description
The invention is further described with reference to the following figures and examples.
As shown in figure 1, the multi-section pressure measurement water-gas alternative oil extraction experimental device for CT scanning of the utility model comprises a water injection system, a gas injection system, a rock seepage system, a pressure data acquisition system 30 and a metering system, wherein the rock seepage system comprises a rock core sample 19 and a seepage cavity 24, the rock core sample 19 is arranged in an inner cavity of the seepage cavity 24, two ends of the rock core sample 19 are respectively provided with a front plug 25 of the seepage cavity and a rear plug 18 of the seepage cavity, the exterior of the rock core sample 19, the front plug 25 of the seepage cavity and the rear plug 18 of the seepage cavity are coated with a rock coating sleeve 23, two ends of the seepage cavity 24 are respectively provided with a seepage cavity injection port 9 and a seepage cavity liquid discharge port 17, the front plug 25 of the seepage cavity and the rear plug 18 of the seepage cavity are respectively sealed with two ends of the seepage cavity 24, a first channel is arranged on the front plug 25 of the seepage cavity, one end of the first channel is communicated with the seepage, the other end of the first channel extends to one end of a core sample 19, a second channel is formed in a plug 18 behind the seepage cavity, one end of the second channel is communicated with a seepage cavity liquid discharge port 17, and the other end of the second channel extends to the other end of the core sample 19; a confining pressure valve 15 and a confining pressure liquid discharge valve 20 are arranged on the seepage cavity 24, and a liquid injection pump 16 is connected to the confining pressure valve 15; the water injection system and the gas injection system are both connected with the seepage cavity filling port 9, and the seepage cavity liquid discharge port 17 is connected with the metering system; the pressure data acquisition system comprises a plurality of pressure sensors distributed along the length direction of the core sample 19, and the pressure sensors are used for detecting the pressure of different positions of the core sample 19.
As the preferred embodiment of the utility model, the seepage flow cavity filling opening 9 is connected with the six-way valve 5, and the water injection system and the gas injection system are all connected with the six-way valve 5.
As the utility model discloses preferred embodiment, container 8 in the middle of the water injection system includes constant speed pump 6 and liquid, and the export of constant speed pump 6 and the entry linkage of container 8 in the middle of the liquid are equipped with liquid control valve 7 on the pipeline of container 8 entry linkage in the middle of constant speed pump 6 and the liquid, and the export of container 8 is connected with seepage flow cavity filling opening 9 in the middle of the liquid.
As a preferred embodiment of the invention, the outlet of the liquid intermediate container 8 is connected to the six-way valve 5.
As the utility model discloses preferred embodiment, the gas injection system includes container 3 in the middle of gas cylinder 1 and the gas, and the export of gas cylinder 1 and the access connection of container 3 in the middle of the gas, the export of container 3 in the middle of the gas is connected with seepage flow cavity filling opening 9, is equipped with gas control valve 2 on the pipeline of container 3 access connection in the middle of the export of gas cylinder 1 and the gas, and the export of container 3 in the middle of the gas is equipped with manometer 4.
As a preferred embodiment of the invention, the outlet of the gas intermediate container 3 is connected to a six-way valve 5.
As a preferred embodiment of the present invention, the seepage chamber 24 is mounted to the stationary base 22.
As a preferred embodiment of the present invention, the confining pressure drain valve 20 is disposed on the upper portion of the seepage chamber 24.
As the preferred embodiment of the present invention, the pressure sensor is installed on the rock covering sheath 23 and passes through the seepage cavity 24, and the pressure sensor is sealed with the seepage cavity 24.
As the utility model discloses preferred embodiment, the utility model discloses a CT scanning is with multistage pressure measurement aqueous vapor oil recovery experimental apparatus in turn still includes computer 29 and pressure data collection station 28, and pressure sensor is connected with pressure data collection station 28, and pressure data collection station 28 is connected with computer 29.
As a preferred embodiment of the present invention, the constant speed pump is connected to a computer 29.
As the utility model discloses preferred embodiment, the measurement system includes backpressure valve 26 and graduated flask 27, and the entry and the seepage flow cavity leakage fluid dram of backpressure valve 26 are connected, and graduated flask 27 sets up in the export of backpressure valve 26.
As the preferred embodiment of the utility model, the liquid injection pump 16 adopts a liquid hand pump.
As the preferred embodiment of the present invention, the rock coating sheath 23 is a rock rubber sheath.
The multi-section pressure measurement water-gas alternative oil extraction experimental method is carried out by the multi-section pressure measurement water-gas alternative oil extraction experimental device through CT scanning, and comprises the following steps:
s1, measuring the porosity and permeability of the core sample 19;
s2, performing bound water treatment on the core sample 19;
s3, assembling the multi-section pressure measurement water-gas alternative oil extraction experimental device for CT scanning;
s4, carrying out CT scanning on the multi-section pressure measurement water-gas alternative oil extraction experimental device for CT scanning to obtain the distribution state of crude oil in the core sample 19 at the initial moment;
s5, injecting water into the seepage cavity 24 through the injection pump 16 and the confining pressure valve 15, opening the confining pressure liquid discharge valve 20, sealing the confining pressure liquid discharge valve 20 after the gas in the annular space between the rock coating sleeve 23 and the seepage cavity 24 is completely discharged, continuing injecting water into the seepage cavity 24 through the injection pump 16 to increase the pressure, and stopping when the confining pressure reaches a preset value;
performing multiple rounds of periodic water-vapor alternate oil extraction physical simulation on the core sample 19 by using a water injection system and a gas injection system, acquiring pressure data of the core sample 19 by using a pressure sensor, and performing CT scanning on the core sample 19 after preset gas injection and water injection are performed each time to obtain the distribution state of crude oil in the core sample 19; according to the obtained distribution state of the crude oil in the core sample 19, the evolution characteristics of the pressure conduction rule and the crude oil occurrence state in the core sample 19 in the water injection and gas injection processes are obtained.
The multi-section pressure measurement water-gas alternative oil extraction experimental method utilizes the multi-section pressure measurement water-gas alternative oil extraction experimental device for CT scanning to realize water-gas alternative oil extraction experimental simulation, and performs CT scanning on a rock core sample after each gas injection or water injection to obtain the distribution state of crude oil in the rock core sample; and obtaining the evolution characteristics of the pressure conduction rule and the crude oil occurrence state in the core sample in the water injection and gas injection process according to the obtained distribution state of the crude oil in the core sample. The utility model discloses an experimental method operation process is simple, clear, has repeatability, and maneuverability is strong, but systematic research water-gas complementary energy in-process, and fluid pressure conduction law and the remaining oil distribution characteristic under its effect in the rock provide meticulous experimental foundation for on-the-spot steam notes oil production process design.
Examples
The multi-section pressure measurement water-air alternative oil extraction experimental device for CT scanning comprises an energy supply system, a rock seepage system, a pressure data acquisition system and a metering system.
The energy supply system comprises a water injection system and a gas injection system, wherein the water injection system and the gas injection system are connected in parallel and are controlled by a six-way valve 5. The gas injection system comprises a gas bottle 1, a gas control valve 2, a pressure gauge 4 and a gas intermediate container 3. The water injection system comprises a constant speed pump 6, a liquid control valve 7 and a liquid intermediate container 8; the rock seepage system comprises a seepage cavity 24, a seepage cavity injection port 9, a seepage cavity liquid discharge port 17, a confining pressure port, a liquid hand pump, a confining pressure liquid discharge port 20, a confining pressure liquid discharge port plug 21, a rock rubber sleeve, a seepage cavity front plug 25, a seepage cavity rear plug 18, a fixed base 22 and a rock core sample 19. The pressure data acquisition system comprises a pressure data acquisition unit 28, a computer 29 and six pressure sensors, wherein the six pressure sensors are respectively a first pressure sensor 10, a second pressure sensor 11, a third pressure sensor 12, a fourth pressure sensor 13, a fifth pressure sensor 14 and a sixth pressure sensor 15; the metering system includes a back pressure valve 26 and a measuring cylinder 27. The constant speed pump 6 is connected to a computer 29.
The rock seepage cavity 24 is a round through structure made of high-strength resin material, the diameter of the rock seepage cavity is 10mm-15mm, and the length of the rock seepage cavity is 120 mm. The core sample 19 is placed in the rock seepage cavity 24, and the diameter of the core sample 19 is 6-8mm, and the length of the core sample is 100 mm.
And a confining pressure port and a confining pressure drain valve 20 are simultaneously arranged on the seepage cavity 24, wherein the confining pressure valve 15 is connected with a hand pump, and the opening and closing of the confining pressure drain valve 20 are controlled by a confining pressure drain valve plug 21.
The first pressure sensor 10, the second pressure sensor 11, the third pressure sensor 12, the fourth pressure sensor 13, the fifth pressure sensor 14 and the sixth pressure sensor 15 are integrally formed with the rock rubber sleeve 23.
The pressure data collector 28 is connected with the first pressure sensor 10, the second pressure sensor 11, the third pressure sensor 12, the fourth pressure sensor 13, the fifth pressure sensor 14 and the sixth pressure sensor 15 through cables, and the pressure data collector 28 digitizes the pressure data of each pressure sensor and transmits the pressure data to the computer 29.
The experimental method of the experimental device for the multi-segment pressure measurement water-gas alternative periodic oil extraction device for CT scanning based on the embodiment comprises the following steps:
s1, measuring the porosity and permeability of the core sample 19;
s2, performing bound water treatment on the core sample 19;
and S3, assembling the multi-section pressure measurement water-gas alternating oil extraction experimental device for CT scanning, placing the core sample 19 in the rock seepage cavity 24, and respectively installing the front plug 25 of the seepage cavity and the rear plug 18 of the seepage cavity.
And S4, fixing the multi-section pressure measurement water-gas alternative oil extraction experimental device for CT scanning in a CT scanner, setting parameters of the CT scanner, and obtaining the distribution state of crude oil in the core sample 19 at the initial moment.
S5, performing multiple rounds of periodic water-vapor alternate oil extraction physical simulation on the core sample 19 by using a water injection system and a gas injection system, acquiring pressure data of the core sample 19 by using a pressure sensor, and performing CT scanning on the core sample 19 after gas injection and water injection are performed each time to obtain the distribution state of crude oil in the core sample 19; according to the obtained distribution state of the crude oil in the core sample 19, the evolution characteristics of the pressure conduction rule and the crude oil occurrence state in the core sample 19 in the water injection and gas injection processes are obtained.
The process of S2 includes: after the core sample 19 is vacuumized to saturate formation water, the core sample 19 is placed into a holder, the simulated oil 5PV is displaced, and aging is carried out for 72 hours.
In S5, the multiple rounds of steam alternating oil recovery physical simulation includes:
setting confining pressure: through the water injection of liquid hand pump from confined pressure valve 15, open confined pressure flowing back valve 20, treat rock gum cover and the interior gas complete discharge of seepage flow cavity annular space after, on confined pressure flowing back valve 20, the installation is confined pressure flowing back valve end cap 21 and is sealed, continues to carry the pressure through the water injection of liquid hand pump in rock gum cover and the seepage flow cavity, stops after treating the confined pressure and reaching the default.
Secondly, multiple rounds of water-steam alternate oil extraction simulation:
1) the 1 st round of water vapor alternate oil extraction law: setting the gas-liquid ratio to be a fixed value (such as 1: 1, 1: 2, 1: 3, 1:4, 1: 5 and the like), setting the flow rate of a constant-speed pump, opening the constant-speed pump 6, opening a liquid inlet valve 7, closing an air inlet valve 2, stopping the pump after the set water injection volume is reached, performing CT scanning, and obtaining the distribution state of crude oil in the core sample 19 after the 1 st section of water injection. During alternate gas injection, the liquid inlet valve 7 is closed, the gas inlet valve 2 is opened, the gas inlet valve 2 is closed and opened after the set gas injection volume is injected, and the distribution state of crude oil in the core sample 19 after the 1 st section of gas injection is obtained;
2) 2 nd round water vapor alternate oil extraction rule: and (3) setting the flow rate of a constant-speed pump according to the gas-liquid ratio of the 1 st round, opening a constant-speed pump 6, opening a liquid inlet valve 7, closing an air inlet valve 2, stopping the pump after the set water injection volume is injected, performing CT scanning, and obtaining the distribution state of crude oil in the core sample 19 after the 2 nd section of water injection. During alternate gas injection, the liquid inlet valve 7 is closed, the gas inlet valve 2 is opened, the gas inlet valve 2 is closed and opened after the set gas injection volume is injected, and the distribution state of crude oil in the core sample 19 after the 2 nd section of gas injection is obtained;
3) and (3) the law of water-vapor alternate oil extraction in the 3 rd round: and (3) according to the gas-liquid ratio of the 2 nd round, setting the flow rate of a constant-speed pump, opening a constant-speed pump 6, opening a liquid inlet valve 7, closing an air inlet valve 2, stopping the pump after the set water injection volume is injected, performing CT scanning, and obtaining the distribution state of crude oil in the core sample 19 after the 3 rd section of water injection. During alternate gas injection, the liquid inlet valve 7 is closed, the gas inlet valve 2 is opened, the gas inlet valve 2 is closed and opened after the set gas injection volume is injected, and the distribution state of crude oil in the rock after the 3 rd section of gas injection is obtained; and repeating the water vapor simulation process for multiple rounds, and stopping the experiment when the crude oil is not produced from the seepage cavity liquid discharge port 17 of the seepage cavity 24.
Recording experimental data:
1) and recording the pressure change of different positions of the rock in the multiple rounds of water vapor alternation process by using a pressure data acquisition system.
2) And (4) researching the saturation of the residual oil in the rock and the distribution characteristics of the residual oil in the pores by combining the CT scanning results in the rock at different rounds of water-vapor alternation time.
The utility model discloses can be used to evaluate the interior fluid pressure conduction law of rock and the remaining oil distribution characteristic under the effect, provide important experimental basis for the design of mining site oil recovery process parameter.
Claims (9)
1. A multi-section pressure measurement water-gas alternative oil extraction experimental device for CT scanning is characterized by comprising a water injection system, a gas injection system, a rock seepage system, a pressure data acquisition system (30) and a metering system, wherein the rock seepage system comprises a rock core sample (19) and a seepage cavity (24), the rock core sample (19) is arranged in an inner cavity of the seepage cavity (24), two ends of the rock core sample (19) are respectively provided with a front plug (25) of the seepage cavity and a rear plug (18) of the seepage cavity, the exterior of the rock core sample (19), the front plug (25) of the seepage cavity and the rear plug (18) of the seepage cavity are respectively coated with a rock coating sleeve (23), two ends of the seepage cavity (24) are respectively provided with a seepage cavity (9) and a seepage cavity liquid discharge port (17), the front plug (25) of the seepage cavity and the rear plug (18) of the seepage cavity are respectively sealed with two ends of the seepage cavity (24), a plug (25) in front of the seepage cavity is provided with a first channel, one end of the first channel is communicated with an injection port (9) of the seepage cavity, the other end of the first channel extends to one end of a core sample (19), a plug (18) behind the seepage cavity is provided with a second channel, one end of the second channel is communicated with a liquid discharge port (17) of the seepage cavity, and the other end of the second channel extends to the other end of the core sample (19); a confining pressure valve (15) and a confining pressure liquid discharge valve (20) are arranged on the seepage cavity (24), and a liquid injection pump (16) is connected to the confining pressure valve (15); the water injection system and the gas injection system are both connected with a seepage cavity filling opening (9), and a seepage cavity liquid discharge opening (17) is connected with the metering system; the pressure data acquisition system comprises a plurality of pressure sensors distributed along the length direction of the core sample (19), and the pressure sensors are used for detecting the pressure of different positions of the core sample (19).
2. The multi-sectional manometry water-gas alternating oil extraction experimental device for CT scanning as claimed in claim 1, wherein a six-way valve (5) is connected to the injection port (9) of the seepage cavity, and both the water injection system and the gas injection system are connected to the six-way valve (5).
3. The multi-section manometry water-air alternating oil extraction experimental device for CT scanning according to claim 1, characterized in that the water injection system comprises a constant speed pump (6) and a liquid intermediate container (8), an outlet of the constant speed pump (6) is connected with an inlet of the liquid intermediate container (8), a liquid control valve (7) is arranged on a pipeline connecting the constant speed pump (6) and the inlet of the liquid intermediate container (8), and an outlet of the liquid intermediate container (8) is connected with an injection port (9) of the seepage cavity.
4. The multi-segment manometry water-gas alternating oil extraction experimental device for CT scanning according to claim 1, characterized in that the gas injection system comprises a gas cylinder (1) and a gas intermediate container (3), the outlet of the gas cylinder (1) is connected with the inlet of the gas intermediate container (3), the outlet of the gas intermediate container (3) is connected with the seepage cavity filling port (9), a gas control valve (2) is arranged on the pipeline connecting the outlet of the gas cylinder (1) and the inlet of the gas intermediate container (3), and the outlet of the gas intermediate container (3) is provided with a pressure gauge (4).
5. The multi-sectional manometry water-air alternating oil extraction experimental device for CT scanning according to claim 1, wherein the seepage chamber (24) is installed on the fixed base (22).
6. The multi-sectional manometry water-air alternating oil extraction experimental device for CT scanning according to claim 1, wherein the confining pressure drain valve (20) is disposed at the upper part of the seepage cavity (24).
7. The multi-sectional manometry water-gas alternating oil extraction experimental device for CT scanning according to claim 1, wherein the pressure sensor is installed on the rock sheath (23) and passes through the seepage cavity (24), and the pressure sensor is sealed with the seepage cavity (24).
8. The multi-segment pressure measurement water-gas alternative oil extraction experimental device for CT scanning according to claim 1, further comprising a computer (29) and a pressure data collector (28), wherein the pressure sensor is connected with the pressure data collector (28), and the pressure data collector (28) is connected with the computer (29).
9. The multi-sectional pressure measurement water-gas alternating oil extraction experimental device for CT scanning according to claim 1, wherein the metering system comprises a back pressure valve (26) and a measuring cylinder (27), an inlet of the back pressure valve (26) is connected with a liquid outlet of the seepage cavity, and the measuring cylinder (27) is arranged at an outlet of the back pressure valve (26).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110924907A (en) * | 2019-12-31 | 2020-03-27 | 西安石油大学 | Multi-section pressure measurement water-air alternative oil extraction experimental device and method for CT scanning |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110924907A (en) * | 2019-12-31 | 2020-03-27 | 西安石油大学 | Multi-section pressure measurement water-air alternative oil extraction experimental device and method for CT scanning |
| CN110924907B (en) * | 2019-12-31 | 2023-12-08 | 西安石油大学 | Multi-section pressure measurement water-gas alternating oil extraction experimental device and method for CT scanning |
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