CN213181176U - High-temperature high-pressure gas-water two-phase seepage testing device - Google Patents
High-temperature high-pressure gas-water two-phase seepage testing device Download PDFInfo
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- CN213181176U CN213181176U CN202022230106.4U CN202022230106U CN213181176U CN 213181176 U CN213181176 U CN 213181176U CN 202022230106 U CN202022230106 U CN 202022230106U CN 213181176 U CN213181176 U CN 213181176U
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Abstract
The utility model discloses a high-temperature high-pressure gas-water two-phase seepage testing device, which comprises an injection system, a triaxial core holder, a condenser, a filter, a gas-liquid separator and a thermostat which are connected in sequence; the injection system comprises a water injection system and a gas injection system which are arranged in parallel; the input end of the triaxial core holder is provided with a pressure sensor, and two ends of the triaxial core holder are connected with a differential pressure sensor; the side wall of the triaxial core holder is provided with a confining pressure inlet, and the confining pressure inlet is connected with the output end of a confining pressure pump through a pipeline; an output control valve is arranged between the triaxial core holder and the condenser, and a pipeline between the triaxial core holder and the output control valve is sequentially connected with a back pressure control valve and a back pressure pump through a tee joint. The utility model discloses can carry out the double-phase seepage flow test of air water under the high temperature high pressure condition, can obtain the underground seepage flow characteristic more truthfully.
Description
Technical Field
The utility model relates to a gas reservoir development technical field, in particular to high temperature high pressure air water double-phase seepage flow testing arrangement.
Background
In order to research the underground seepage characteristics of the reservoir, a seepage testing device is often adopted to test the underground seepage characteristics of the reservoir, so as to obtain a seepage curve and further identify the underground seepage characteristics of the reservoir. At present, a gas-water phase permeability test experiment is generally carried out by applying compressed air or nitrogen and formation water (injected water) or standard brine under a laboratory condition by adopting a steady state method or an unsteady state method, however, compared with the conditions of high temperature and high pressure under the normal temperature and normal pressure condition, the gas-water viscosity, the density, the gas-water interfacial tension, the reservoir physical property parameters and the like of the gas-water phase permeability test experiment have obvious differences, so that the real underground seepage characteristics can not be truly reflected by a phase permeability test result under the normal temperature and differential pressure.
SUMMERY OF THE UTILITY MODEL
To the above problem, the utility model aims at providing a double-phase seepage flow testing arrangement of high temperature high pressure air water can simulate reservoir high temperature high pressure condition, obtains more real double-phase seepage flow result, provides important technical support for recognizing the real seepage flow characteristic in high temperature high pressure gas field underground.
The technical scheme of the utility model as follows:
a high-temperature high-pressure gas-water two-phase seepage testing device comprises an injection system, a triaxial core holder, a condenser, a filter and a gas-liquid separator which are sequentially connected;
the injection system comprises a water injection system and a gas injection system which are arranged in parallel, and the water injection system comprises a water storage tank, a first pressure pump, a first intermediate container and a first control valve which are sequentially connected; the gas injection system comprises a gas storage tank, a pressure pump II, an intermediate container II and a control valve II which are connected in sequence;
the input end of the triaxial core holder is provided with a pressure sensor, and two ends of the triaxial core holder are connected with a differential pressure sensor; the side wall of the triaxial core holder is provided with a confining pressure inlet, and the confining pressure inlet is connected with the output end of a confining pressure pump through a pipeline; an output control valve is arranged between the triaxial core holder and the condenser, and a pipeline between the triaxial core holder and the output control valve is sequentially connected with a back pressure control valve and a back pressure pump through a tee joint;
the middle container I, the middle container II, the pressure sensor, the differential pressure sensor and the three-axis rock core holder are arranged in a constant temperature box;
the gas-liquid separator is provided with a liquid level meter, an exhaust port of the gas-liquid separator is connected with the gas recovery tank, and a gas flowmeter is arranged on a pipeline connected with the gas recovery tank.
Preferably, the first control valve and the second control valve are spherical control valves.
Preferably, the condenser is a ring condenser.
Preferably, the annular condenser comprises a condenser shell, the condenser shell is a sealed annular pipeline, an annular fluid pipeline is arranged in the condenser shell, the left end and the right end of the annular fluid pipeline penetrate out of the condenser shell, the condenser shell is connected with the output control valve and the filter respectively, a condensate channel is formed between the condenser shell and the annular fluid pipeline, a condensate inlet is formed in the left end of the condensate channel, and a condensate outlet is formed in the right end of the condensate channel.
Preferably, the filter includes sealed casing, both ends are equipped with filter input port and filter delivery outlet respectively about sealed casing, sealed casing is inside to be equipped with a plurality of filter screens from a left side to the right side, and is close to more the filter screen filtration pore size that is close to the filter delivery outlet is littleer.
Preferably, the device further comprises a PLC control system, and the PLC control system is respectively connected with the constant temperature box, the first control valve, the second control valve, the output control valve and the return pressure control valve.
The utility model has the advantages that:
the utility model can simulate the high temperature and high pressure conditions of the reservoir, obtain more real two-phase seepage results, and provide important technical support for recognizing the real underground seepage characteristics of the high temperature and high pressure gas field; the triaxial core holder is arranged, triaxial stress loading can be realized on the core, the condition that the conventional core holder can only load radial stress is avoided, the stratum can be simulated more truly, and the experimental accuracy is improved; the high-temperature condition of the stratum can be simulated by arranging the constant temperature box, and the high-temperature and high-pressure condition of the reservoir can be simulated in a conclusion manner.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a schematic structural view of the high-temperature high-pressure gas-water two-phase seepage testing device of the present invention;
FIG. 2 is a schematic sectional view of the condenser of the high-temperature high-pressure gas-water two-phase seepage testing device according to the embodiment of the present invention;
fig. 3 is a schematic structural view of an embodiment of the filter of the high-temperature high-pressure air-water two-phase seepage testing device of the present invention.
Reference numbers in the figures:
1-triaxial core holder, 2-condenser, 201-condenser shell, 202-annular fluid pipeline, 203-condensate channel, 3-filter, 301-sealing shell, 302-filter input port, 303-filter output port, 304-filter screen, 4-gas-liquid separator, 5-water storage tank, 6-pressure pump I, 7-intermediate container I, 8-control valve I, 9-gas storage tank, 10-pressure pump II, 11-intermediate container II, 12-control valve II, 13-pressure sensor, 14-differential pressure sensor, 15-surrounding pressure pump, 16-output control valve, 17-return control valve, 18-return pressure pump, 19-thermostat, 20-liquid level meter, 21-gas recovery tank, 21-condensate pump, 3-filter, 7-intermediate container I, 8-control valve I, 9-gas storage tank II, 10-pressure pump II, 11-intermediate container, 22-gas flow meter.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
It should be noted that, in the present application, the embodiments and the technical features of the embodiments may be combined with each other without conflict.
It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
In the present application, the terms "first", "second", and the like are used for distinguishing similar objects, and not for describing a particular order or sequence order, unless otherwise specified. It is to be understood that the terms so used; the terms "upper", "lower", "left", "right", and the like are used generally with respect to the orientation shown in the drawings, or with respect to the component itself in a vertical, or gravitational orientation; likewise, "inner", "outer", and the like refer to the inner and outer relative to the contours of the components themselves for ease of understanding and description. The above directional terms are not intended to limit the present invention.
As shown in fig. 1-3, a high-temperature high-pressure gas-water two-phase seepage testing device comprises an injection system, a triaxial core holder 1, a condenser 2, a filter 3 and a gas-liquid separator 4 which are connected in sequence;
the injection system comprises a water injection system and a gas injection system which are arranged in parallel, the water injection system comprises a water storage tank 5, a pressure pump I6, an intermediate container I7 and a control valve I8 which are sequentially connected, and liquid in the water storage tank is simulated formation water; the gas injection system comprises a gas storage tank 9, a pressure pump II 10, an intermediate container II 11 and a control valve II 12 which are connected in sequence, and gas in the gas storage tank is nitrogen;
the input end of the triaxial core holder 1 is provided with a pressure sensor 13, and two ends of the triaxial core holder 1 are connected with a differential pressure sensor 14; the side wall of the triaxial core holder 1 is provided with a confining pressure inlet, and the confining pressure inlet is connected with the output end of a confining pressure pump 15 through a pipeline; an output control valve 16 is arranged between the triaxial core holder 1 and the condenser 2, and a pipeline between the triaxial core holder 1 and the output control valve 16 is sequentially connected with a back pressure control valve 17 and a back pressure pump 18 through a tee joint;
the middle container I7, the middle container II 11, the pressure sensor 13, the differential pressure sensor 14 and the triaxial core holder 1 are arranged in a constant temperature box 19;
the gas-liquid separator 4 is provided with a liquid level meter 20, an exhaust port of the gas-liquid separator 4 is connected with a gas recovery tank 21, and a gas flowmeter 22 is arranged on a pipeline connected with the gas recovery tank.
In a specific embodiment, the first control valve 8 and the second control valve 12 are ball-shaped control valves.
In a specific embodiment, the condenser 2 is an annular condenser, the annular condenser includes a condenser shell 201, the condenser shell 201 is a sealed annular pipeline, an annular fluid pipeline 202 is arranged in the condenser shell 201, the left end and the right end of the annular fluid pipeline 202 penetrate out of the condenser shell 201, the condenser shell 201 is connected with the output control valve 16 and the filter 3 respectively, a condensate passage 203 is formed between the condenser shell 201 and the annular fluid pipeline 202, a condensate inlet is formed at the left end of the condensate passage 203, and a condensate outlet is formed at the right end of the condensate passage 203. Optionally, the condensate level in the condensate channel 203 is cold water. In another specific embodiment, the condenser 2 is a prior art condenser.
In a specific embodiment, the filter 3 includes a sealed housing 301, the left and right ends of the sealed housing 301 are respectively provided with a filter input port 302 and a filter output port 303, the sealed housing 301 is internally provided with a plurality of filter screens 304 from left to right, and the filter holes of the filter screens 304 closer to the filter output port 303 are smaller in pore size. In another specific embodiment, the filter 3 is a filter of the prior art.
In a specific embodiment, in order to control the temperature and the pressure more intelligently, the high-temperature and high-pressure gas-water two-phase seepage testing apparatus further includes a PLC control system (not shown in the figure), the PLC control system is respectively connected to the thermostat 19, the first control valve 8, the second control valve 12, the output control valve 16, and the return control valve 17, and the first control valve 8, the second control valve 12, the output control valve 16, and the return control valve 17 are all solenoid valves.
In all the embodiments, the pressure pump, the intermediate container, the triaxial core holder, the confining pressure pump, the back pressure pump, the gas-liquid separator, the pressure sensor, the differential pressure sensor and other sub-components are all in the prior art, and the specific structure is not described herein again.
In a specific use the utility model discloses carry out air water seepage flow test embodiment, the test procedure is as follows:
firstly, placing a rock sample into the triaxial core holder and saturating simulated formation water, enabling the formation water in a water outlet pipe to pass through the rock sample by using a pressure pump I at a certain pressure, and continuously measuring the water-phase permeability for three times after the pressure difference and the outlet flow of the displacement rock sample are stable, wherein the relative error is less than 3%, and the water-phase permeability is used as a basic value of water-gas relative permeability.
And secondly, displacing the rock sample with gas until no water is discharged, testing the single-phase gas permeability in a water-bound state, and if the gas-phase permeability is higher than the single-phase water-displacement permeability, taking the gas-phase permeability as a basic value of the water-gas-phase relative permeability.
And thirdly, selecting a proper displacement pressure difference according to the absolute permeability and the water phase permeability, wherein the initial pressure difference must ensure that the terminal effect can be overcome and no turbulent flow is generated.
Then, water flooding is started, and the displacement pressure, the water yield and the gas yield at each moment are recorded.
And finally, driving gas by water to a residual gas state, and finishing the experiment after measuring the effective permeability of the water phase in the residual state.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments, and although the present invention has been disclosed with the preferred embodiments, it is not limited to the present invention, and any skilled person in the art can make some modifications or equivalent embodiments without departing from the scope of the present invention, but all the technical matters of the present invention are within the scope of the present invention.
Claims (6)
1. A high-temperature high-pressure gas-water two-phase seepage testing device is characterized by comprising an injection system, a triaxial core holder, a condenser, a filter and a gas-liquid separator which are sequentially connected;
the injection system comprises a water injection system and a gas injection system which are arranged in parallel, and the water injection system comprises a water storage tank, a first pressure pump, a first intermediate container and a first control valve which are sequentially connected; the gas injection system comprises a gas storage tank, a pressure pump II, an intermediate container II and a control valve II which are connected in sequence;
the input end of the triaxial core holder is provided with a pressure sensor, and two ends of the triaxial core holder are connected with a differential pressure sensor; the side wall of the triaxial core holder is provided with a confining pressure inlet, and the confining pressure inlet is connected with the output end of a confining pressure pump through a pipeline; an output control valve is arranged between the triaxial core holder and the condenser, and a pipeline between the triaxial core holder and the output control valve is sequentially connected with a back pressure control valve and a back pressure pump through a tee joint;
the middle container I, the middle container II, the pressure sensor, the differential pressure sensor and the three-axis rock core holder are arranged in a constant temperature box;
the gas-liquid separator is provided with a liquid level meter, an exhaust port of the gas-liquid separator is connected with the gas recovery tank, and a gas flowmeter is arranged on a pipeline connected with the gas recovery tank.
2. The high-temperature high-pressure gas-water two-phase seepage testing device as claimed in claim 1, wherein the first control valve and the second control valve are spherical control valves.
3. The high-temperature high-pressure gas-water two-phase seepage testing device as claimed in claim 1, wherein the condenser is an annular condenser.
4. The two-phase seepage testing device of air and water at high temperature and high pressure according to claim 3, wherein the annular condenser comprises a condenser shell, the condenser shell is a sealed annular pipeline, an annular fluid pipeline is arranged in the condenser shell, the left end and the right end of the annular fluid pipeline penetrate out of the condenser shell and are respectively connected with the output control valve and the filter, a condensate passage is formed between the condenser shell and the annular fluid pipeline, a condensate inlet is arranged at the left end of the condensate passage, and a condensate outlet is arranged at the right end of the condensate passage.
5. The two-phase seepage flow testing arrangement of high temperature high pressure gas water of claim 1, characterized in that, the filter includes sealed casing, the left and right both ends of sealed casing are equipped with filter input port and filter delivery outlet respectively, sealed casing is inside to be equipped with a plurality of filter screens from a left side to the right side, and the filter screen filtration pore diameter that is closer to the filter delivery outlet is littleer more.
6. The high-temperature high-pressure gas-water two-phase seepage testing device as claimed in any one of claims 1 to 5, further comprising a PLC control system, wherein the PLC control system is respectively connected with the thermostat, the first control valve, the second control valve, the output control valve and the return control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022230106.4U CN213181176U (en) | 2020-10-09 | 2020-10-09 | High-temperature high-pressure gas-water two-phase seepage testing device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022230106.4U CN213181176U (en) | 2020-10-09 | 2020-10-09 | High-temperature high-pressure gas-water two-phase seepage testing device |
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| CN213181176U true CN213181176U (en) | 2021-05-11 |
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| CN202022230106.4U Expired - Fee Related CN213181176U (en) | 2020-10-09 | 2020-10-09 | High-temperature high-pressure gas-water two-phase seepage testing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118150440A (en) * | 2024-05-11 | 2024-06-07 | 中国石油大学(华东) | Device and method for testing water permeability of gas-water of coal and rock |
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2020
- 2020-10-09 CN CN202022230106.4U patent/CN213181176U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118150440A (en) * | 2024-05-11 | 2024-06-07 | 中国石油大学(华东) | Device and method for testing water permeability of gas-water of coal and rock |
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Granted publication date: 20210511 Termination date: 20211009 |