CN212748663U - Unsteady gas-water phase seepage testing device - Google Patents
Unsteady gas-water phase seepage testing device Download PDFInfo
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- CN212748663U CN212748663U CN202021658808.6U CN202021658808U CN212748663U CN 212748663 U CN212748663 U CN 212748663U CN 202021658808 U CN202021658808 U CN 202021658808U CN 212748663 U CN212748663 U CN 212748663U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 133
- 238000012360 testing method Methods 0.000 title claims abstract description 37
- 239000007789 gas Substances 0.000 claims abstract description 86
- 239000011435 rock Substances 0.000 claims abstract description 48
- 230000035699 permeability Effects 0.000 claims abstract description 45
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 30
- 238000006073 displacement reaction Methods 0.000 claims abstract description 26
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 15
- 238000001035 drying Methods 0.000 claims abstract description 12
- 238000005259 measurement Methods 0.000 claims abstract description 6
- 238000001764 infiltration Methods 0.000 claims abstract description 5
- 230000008595 infiltration Effects 0.000 claims abstract description 5
- 239000000411 inducer Substances 0.000 claims 1
- 239000012071 phase Substances 0.000 description 39
- 238000000034 method Methods 0.000 description 25
- 238000004519 manufacturing process Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 9
- 239000010410 layer Substances 0.000 description 8
- 229920006395 saturated elastomer Polymers 0.000 description 8
- 239000008346 aqueous phase Substances 0.000 description 6
- 239000008398 formation water Substances 0.000 description 5
- 239000011229 interlayer Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 238000011005 laboratory method Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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Abstract
The utility model discloses an unsteady state gas-water phase infiltration testing arrangement, mainly by the water source part, the air supply part, the displacement system, air water volume measurement system and data acquisition control cabinet are constituteed, the water source part is including the measuring pump that connects gradually, intermediate container and filter, the air supply part is including the nitrogen cylinder that connects gradually, relief pressure valve and booster pump, air water volume measurement system is including the drying bottle that connects gradually, 50mL scale pipe and gas flow metering device, be provided with the third three-way valve among the air water volume measurement system, the displacement system includes the rock core holder, enclose pressure pump and backpressure valve, the entrance point of rock core holder links to each other with water source part and air source part respectively through first three-way valve, the exit end of rock core holder passes through the second three-way valve and links to each other with air water. The device can quickly and conveniently test gas-water phase permeability curves of gas-drive water-drive gas and water-drive gas, so that the gas saturation of the gas reservoir with water and gas can be effectively evaluated.
Description
Technical Field
The utility model relates to an oil gas field development technical field, concretely relates to unsteady state gas-water phase infiltration testing arrangement.
Background
The gas reservoir with water is a gas reservoir with edge water, bottom water, interlayer water or a gas-containing water layer, and the gas reservoir with the edge water is generally distributed in a layered manner, and a single reservoir is relatively thin and has the characteristic of a multi-producing layer. The gas reservoir with bottom water is mostly in a thick-layer block shape, the heterogeneity is strong, and multiple incompletely developed interlayer is arranged in the reservoir. The gas reservoir with interlayer water is generally formed by mixing water layers between an upper gas layer and a lower gas layer, belongs to sealed water, is not communicated with the outside, has no direct supply area and has limited water energy. The gas reservoir with the gas-containing water layer belongs to a transition zone type gas reservoir, and is characterized in that gas source energy is insufficient in the gas reservoir forming process, water in pores of a reservoir cannot be completely displaced out, the gas-containing water layer is formed, and gas and water are produced at the same time. The gas-water phase permeability curve is very important basic data in the production and development of the existing gas reservoir, the data is usually obtained by performing a gas-water drive experiment on a rock core in a laboratory, but the gas-water drive and the water-water drive exist in the production process of the existing gas reservoir, so that the gas-water phase permeability curve of the gas-water drive is obviously insufficient when the gas-water phase permeability curve is analyzed independently. Therefore, an integrated experimental device capable of testing both the gas-drive water-gas-water-phase permeability curve and the water-drive gas-water-phase permeability curve is needed.
Laboratory methods for obtaining the phase permeation curves include steady-state and unsteady-state methods, each of which has its advantages and disadvantages. In the unsteady state experiment, two fluids are not injected into the rock core at the same time, the rock core is saturated by water and then is displaced by nitrogen, namely, the data of gas production, water production, pressure difference between two ends and the like at different moments of the outlet end of the rock core are measured in the gas-drive water process, and the relative permeability of gas phase and water phase and the corresponding water saturation are obtained. The unsteady state method is close to the actual condition of an oil-gas reservoir in the experimental displacement process, is short in experimental time and is widely applied to various large oil-gas fields, so that the unsteady state method is adopted for testing the gas-drive water-gas-water-phase permeability curve and the water-drive gas-water-phase permeability curve.
SUMMERY OF THE UTILITY MODEL
The above-mentioned not enough to among the prior art, the utility model provides an unsteady state gas aqueous phase oozes testing arrangement can test the gas drive aqueous vapor aqueous phase and ooze the curve and can test the water drive gas aqueous phase and ooze the curve again.
The utility model adopts the technical scheme that an unsteady state gas-water phase infiltration testing arrangement mainly comprises water source part, air supply part, displacement system, air water volume measurement system and data acquisition control cabinet. The water source part comprises a metering pump, an intermediate container and a filter which are connected in sequence, one side of the intermediate container is connected with a water tank, a first valve is installed between the water tank and the intermediate container, the air source part comprises a nitrogen cylinder, a pressure reducing valve and a booster pump which are connected in sequence, the air-water volume metering system comprises a drying bottle, a 50mL graduated tube and a gas flow metering device which are connected in sequence, the drying bottle is placed on an electronic balance, the displacement system comprises a rock core holder, a confining pressure pump and a back pressure valve which are connected in sequence, the confining pressure pump is arranged at the bottom of the rock core holder and is connected with the rock core holder through a confining pressure pipeline, a second valve is arranged on a pipeline between the confining pressure pump and the rock core holder, the inlet end of the rock core holder is connected with the water source part and the air source part through a first three-way valve respectively, and a back pressure valve is arranged between the rock core holder and the second three-way valve.
The utility model discloses a characteristics still lie in back pressure valve and differential pressure sensor and data acquisition console electricity and be connected.
The utility model has the advantages that: according to the scheme, a saturated rock core is placed in a rock core holder, an unsteady state method is adopted, a gas-drive water-gas-water-phase seepage testing device and a water-drive gas-water-phase seepage testing device are combined, certain displacement pressure and confining pressure are applied to a rock sample through a gas source part, a water source part and a confining pressure pump, the water yield and the gas yield in the displacement process are measured through a gas-water volume measuring system, the gas-water relative permeability under different saturation degrees is obtained, and a gas-water-phase seepage curve is drawn. The utility model discloses an unsteady state gas aqueous phase oozes testing arrangement can test gas drive aqueous vapor aqueous phase and ooze the curve and can test water drive gas aqueous phase again and ooze the curve, and the operation is got up very simply, and the practicality is strong.
Drawings
Fig. 1 is a schematic structural diagram of the unsteady state gas-water phase infiltration testing device of the present invention.
In the figure: 1. the system comprises a metering pump, 2, an intermediate container, 3, a first valve, 4, a water tank, 5, a filter, 6, a first three-way valve, 7, a core holder, 8, a second valve, 9, a confining pressure pump, 10, a back pressure valve, 11, a second three-way valve, 12, a drying bottle, 13, an electronic balance, 14.50mL of a graduated tube, 15, a third three-way valve, 16, a gas flow metering device, 17, a nitrogen bottle, 18, a pressure reducing valve, 19, a booster pump, 20, a differential pressure sensor and 21, and a data acquisition console.
Detailed Description
The invention is described in detail below with reference to the drawings so that those skilled in the art can understand the invention, but it should be understood that the invention is not limited to the scope of the specific embodiments, and that various changes are obvious to those skilled in the art as long as they are within the spirit and scope of the invention as defined and defined by the appended claims.
As shown in FIG. 1, the unsteady gas-water phase permeability testing device comprises a water source part, a gas source part, a displacement system, a gas-water volume metering system and a data acquisition console 21. The water source part comprises a metering pump 1, an intermediate container 2 and a filter 5 which are connected in sequence, one side of the intermediate container 2 is connected with a water tank 4, a first valve 3 is arranged on a pipeline between the water tank 4 and the intermediate container 2, the air source part comprises a nitrogen cylinder 17, a pressure reducing valve 18 and a booster pump 19 which are connected in sequence, the air-water volume metering system comprises a drying bottle 12, a 50mL graduated tube 14 and an air flow metering device 16 which are connected in sequence, the drying bottle 12 is placed on an electronic balance 13, a third three-way valve 15 is arranged on a pipeline between the drying bottle 12 and the 50mL graduated tube 14 and the air flow metering device 16, the displacement system comprises a rock core holder 7, a confining pressure pump 9 and a back pressure valve 10, the confining pressure pump 9 is arranged at the bottom of the rock core holder 7 and is connected with the rock core holder 7 through a confining pressure pipeline, and a second valve 8 is arranged on a pipeline between, the inlet end of the core holder 7 is respectively connected with the water source part and the gas source part through the first three-way valve 6, the outlet end of the core holder 7 is connected with the gas-water volume metering system through the second three-way valve 11, and a back-pressure valve 10 is arranged between the core holder 7 and the second three-way valve 11.
The back pressure valve 10 and the differential pressure sensor 20 are both electrically connected with a data acquisition console 21.
The first valve 3, the second valve 8, the first three-way valve 6, the second three-way valve 11 and the third three-way valve 15 mentioned in the present embodiment may be valves that are opened and closed by ordinary hand, but in order to realize automatic control, electromagnetic valves that can be automatically adjusted may be selected.
When the device is used, the nitrogen cylinder 17, the pressure reducing valve 18 and the booster pump 19 are matched to provide displacement pressure for a rock core in the rock core holder 7 or provide saturated gas for the rock core, and the confining pressure pump 9 and the second valve 8 are matched to provide confining pressure for the rock core holder 7.
The testing arrangement that this scheme provided adopts unsteady state method test gas drive water and water drive gas-water phase permeability curve, and its test principle is as follows:
the device adopts unsteady state method test core's gas drive aqueous vapor water phase permeability curve and water drive gas aqueous vapor phase permeability curve, tests gas drive aqueous vapor water phase permeability curve: firstly, preparing formation water to saturate a rock core, applying certain displacement pressure and confining pressure on the rock core through a nitrogen cylinder 17, a booster pump 19 and a confining pressure pump 9, measuring the water yield and the gas yield in the gas flooding water process through an electronic balance 13 and a gas flow metering device 16, calculating the gas-water relative permeability and the water saturation through a JBN method, and drawing a gas-flooding water-gas-water-phase permeability curve. Testing the water-flooding gas-water phase permeability curve: preparing a stratum water saturated rock core, displacing the rock core through a nitrogen cylinder 17 to establish irreducible water saturation, saturating gas in the rock core under simulated stratum pressure through the nitrogen cylinder 17 and an increasing pump 19, raising the pressure to designed water drive pressure through a measuring pump 1, slowly reducing the back pressure through a back pressure valve 10 to reach the designed displacement differential pressure, measuring the water yield and the gas yield in the water drive gas process through a 50mL graduated tube 14 and a gas flow metering device 16, keeping the confining pressure and the displacement differential pressure unchanged in the whole displacement process until the rock core is not gas, calculating the relative permeability and the gas saturation of gas and water according to the recorded data by a JBN method, and drawing a water drive gas water phase permeability curve.
Now that a detailed description of the unsteady gas-water phase permeability test apparatus has been completed, a method for testing a gas-drive water-gas-water phase permeability curve and a water-drive gas-water phase permeability curve using an unsteady gas-water phase permeability test apparatus will be described in detail.
A method for testing a gas-drive water-gas-water phase permeability curve and a water-drive gas-water phase permeability curve by using an unsteady gas-water phase permeability testing device comprises steps S1 to S10.
Firstly, testing a gas drive water-gas-water phase permeability curve:
s1: the method comprises the steps of obtaining a dried rock core of a reservoir to be measured, recording porosity, permeability, length, dry weight and diameter of the rock core, preparing formation water, vacuumizing the rock core under set pressure to saturate the formation water, and measuring saturation weight of the rock core.
S2: the saturated rock core is placed in a sealing cavity of the rock core holder 7, the first three-way valve 6A and the first three-way valve 6B are closed, the first three-way valve 6C is opened, the second three-way valve 11D and the second three-way valve 11E are opened, the second three-way valve 11F is closed, the third three-way valve 15H and the third three-way valve 15I are opened, and the third three-way valve 15G is closed.
S3: and opening the second valve 8, applying set confining pressure to the rock core by using a confining pressure pump 9, opening a nitrogen cylinder 17, regulating the pressure of the nitrogen cylinder 17 by using a pressure reducing valve 18, and reaching the set gas driving pressure by using a booster pump 19 when the pressure of the nitrogen cylinder 17 is not enough to provide the gas driving pressure.
S4: when the gas drive pressure reaches the set displacement pressure, the first three-way valve 6B is opened, timing is started at the same time, the differential pressure sensor 20 is connected with the data acquisition console 21, the displacement differential pressure at two ends of the rock core is recorded in real time, the electronic balance 13 measures the weight of water displaced by gas, namely the water yield, when the readings of the electronic balance 13 change, one-time reading is recorded, and the gas flow metering device 16 measures the gas yield.
S5: drawing a relation curve of the accumulated gas production rate, the accumulated water production rate and the accumulated gas injection time, uniformly taking points on the curve to obtain the corresponding gas production rate and water production rate in a certain time interval, calculating the gas-water relative permeability and the water saturation according to a JBN method, and drawing a gas-drive water-gas-water-phase permeability curve.
Then testing the water-flooding gas-water phase permeability curve:
s6: the method comprises the steps of obtaining a dried rock core of a reservoir to be measured, recording porosity, permeability, length, dry weight and diameter of the rock core, preparing formation water, vacuumizing the rock core under set pressure to saturate the formation water, and measuring saturation weight of the rock core.
S7: the core weighed out to be over saturated is placed into a sealing cavity of the core holder 7, the first three-way valve 6A and the first three-way valve 6B are closed, the first three-way valve 6C is opened, the second three-way valve 11D and the second three-way valve 11E are opened, the second three-way valve 6F is closed, the third three-way valve 15G is closed, and the third three-way valve 15H and the third three-way valve 15I are opened. And opening a valve of the first three-way valve 6B, opening a nitrogen cylinder 17, establishing the saturation of the bound water of the rock core by air drive through a pressure reducing valve 18, displacing the rock core in the forward and reverse directions in the displacement process to ensure that the bound water in the rock core is uniformly distributed, stopping the air drive when the reading of the electronic balance 13 is not changed, weighing the electronic balance 13 to determine the saturation of the bound water, and comprehensively determining the displacement differential pressure of the rock core to be measured according to the parameters such as the permeability of the rock core to be measured.
S8: before water drive, the first three-way valve 6B is opened, the core is saturated with gas under the simulated formation pressure through the nitrogen cylinder 17 and the booster pump 19, and after the core is saturated with gas, the first three-way valve 6B is closed.
S9: the water drive pressure with measuring pump 1 risees to design pressure, slowly reduce the displacement pressure difference that the back pressure reached the design through back pressure valve 10, open first three-way valve 6A and first three-way valve 6C, close first three-way valve 6B, open second three-way valve 11D and second three-way valve 11F, close second three-way valve 11E, open third three-way valve 15G and open and third three-way valve 15I, close third three-way valve 15H, begin the timing simultaneously, water drives the gas and begins. The water yield is measured through a 50mL graduated tube 14, the gas yield which is the gas yield displaced by water is accurately measured through a gas flow measuring device 16, a differential pressure sensor 20 records displacement differential pressure in real time, and the confining pressure and the displacement differential pressure are kept unchanged in the displacement process until the rock core is displaced until the gas is not discharged.
S10: drawing a relation curve of the accumulated gas production rate, the accumulated water production rate and the accumulated gas injection time, uniformly taking points on the curve to obtain the corresponding gas production rate and water production rate in a certain time interval, calculating the gas-water relative permeability and the gas saturation according to a JBN method, and drawing a water-drive gas-water phase permeability curve.
In conclusion, the device measures the data such as water yield, gas yield and displacement differential pressure through the unsteady state method by the gas source part, the water source part, the displacement system, the gas-water volume metering system and the data acquisition console 21, calculates the relative permeability of the gas-drive water and the gas-water phase and the relative permeability of the water-drive gas and the gas-water phase through the JBN method, can quickly and conveniently obtain a gas-drive water-gas-water phase permeability curve and a water-drive gas-water phase permeability curve, and accordingly effectively evaluates the gas saturation of the gas reservoir with the water.
Claims (6)
1. The utility model provides an unsteady state gas-water phase infiltration testing arrangement mainly comprises water source part, air supply part, displacement system, gas water volume measurement system and data acquisition control cabinet (21), its characterized in that: the water source part comprises a metering pump (1), an intermediate container (2) and a filter (5) which are sequentially connected, one side of the intermediate container (2) is connected with a water tank (4), a first valve (3) is arranged on a pipeline between the water tank (4) and the intermediate container (2), the air source part comprises a nitrogen cylinder (17), a pressure reducing valve (18) and a booster pump (19) which are sequentially connected, the air-water volume metering system comprises a drying bottle (12), a 50mL graduated tube (14) and an air flow metering device (16) which are sequentially connected, the drying bottle (12) is placed on an electronic balance (13), a third three-way valve (15) is arranged on a pipeline between the drying bottle (12), the 50mL graduated tube (14) and the air flow metering device (16), the displacement system comprises a rock core holder (7), a confining pressure pump (9) and a back pressure valve (10), confining pressure pump (9) sets up the bottom at core holder (7) to link to each other with core holder (7) through confining pressure pipeline, be provided with second valve (8) on the pipeline between confining pressure pump (9) and core holder (7), the inducer of core holder (7) links to each other with water source part and gas source part respectively through first three-way valve (6), and the exit end of core holder (7) passes through second three-way valve (11) and links to each other with air water volume measurement system.
2. The unsteady gas-water phase permeability testing device according to claim 1, characterized in that a back pressure valve (10) is arranged between the core holder (7) and the second three-way valve (11).
3. The unsteady gas-water phase permeability test device as claimed in claim 1, wherein the gas source part is provided with a booster pump (19).
4. The unsteady gas-water phase permeability test device according to claim 1, wherein the back pressure valve (10) and the differential pressure sensor (20) are electrically connected with a data acquisition console (21).
5. The unsteady gas-water phase permeability test device according to claim 1, wherein the second three-way valve (11) is connected with a back pressure valve (10), a drying bottle (12) and a 50mL graduated tube (14).
6. The unsteady gas-water phase permeability test device as claimed in claim 1, wherein the third three-way valve (15) is connected with the drying bottle (12), the 50mL graduated tube (14) and the gas flow metering device (16), respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021658808.6U CN212748663U (en) | 2020-08-11 | 2020-08-11 | Unsteady gas-water phase seepage testing device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021658808.6U CN212748663U (en) | 2020-08-11 | 2020-08-11 | Unsteady gas-water phase seepage testing device |
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| CN212748663U true CN212748663U (en) | 2021-03-19 |
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| CN202021658808.6U Expired - Fee Related CN212748663U (en) | 2020-08-11 | 2020-08-11 | Unsteady gas-water phase seepage testing device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113431537A (en) * | 2021-06-30 | 2021-09-24 | 延安大学 | Unsteady state variable flow rate large-scale core water-flooding gas phase-to-permeability testing method |
| CN115753543A (en) * | 2022-11-05 | 2023-03-07 | 西南石油大学 | Shale support fracture relative permeability determination device and method considering probability distribution |
-
2020
- 2020-08-11 CN CN202021658808.6U patent/CN212748663U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113431537A (en) * | 2021-06-30 | 2021-09-24 | 延安大学 | Unsteady state variable flow rate large-scale core water-flooding gas phase-to-permeability testing method |
| CN113431537B (en) * | 2021-06-30 | 2023-12-12 | 延安大学 | Unsteady variable-flow-rate large-scale rock core water flooding gas relative permeability testing method |
| CN115753543A (en) * | 2022-11-05 | 2023-03-07 | 西南石油大学 | Shale support fracture relative permeability determination device and method considering probability distribution |
| CN115753543B (en) * | 2022-11-05 | 2024-01-23 | 西南石油大学 | Shale support fracture relative permeability measuring device and method considering probability distribution |
| US12092592B2 (en) | 2022-11-05 | 2024-09-17 | Southwest Petroleum University | Device and method for measuring the relative permeability of propped fractures in shale considering probability distribution |
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