CN112065342A - Device and method for simulating oil-gas contact reaction in injection and production processes of underground gas storage - Google Patents
Device and method for simulating oil-gas contact reaction in injection and production processes of underground gas storage Download PDFInfo
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- 238000002347 injection Methods 0.000 title claims abstract description 48
- 239000007924 injection Substances 0.000 title claims abstract description 48
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000007789 gas Substances 0.000 claims abstract description 192
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 85
- 238000000926 separation method Methods 0.000 claims abstract description 33
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000002474 experimental method Methods 0.000 claims abstract description 19
- 239000012530 fluid Substances 0.000 claims abstract description 13
- 239000003345 natural gas Substances 0.000 claims abstract description 12
- 239000003921 oil Substances 0.000 claims description 57
- 239000000523 sample Substances 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 230000006641 stabilisation Effects 0.000 claims description 2
- 238000011105 stabilization Methods 0.000 claims description 2
- 239000011435 rock Substances 0.000 description 12
- 239000011148 porous material Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000007423 decrease Effects 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/166—Injecting a gaseous medium; Injecting a gaseous medium and a liquid medium
- E21B43/168—Injecting a gaseous medium
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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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/34—Arrangements for separating materials produced by the well
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/22—Fuels; Explosives
- G01N33/225—Gaseous fuels, e.g. natural gas
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/26—Oils; Viscous liquids; Paints; Inks
- G01N33/28—Oils, i.e. hydrocarbon liquids
- G01N33/2823—Raw oil, drilling fluid or polyphasic mixtures
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/70—Combining sequestration of CO2 and exploitation of hydrocarbons by injecting CO2 or carbonated water in oil wells
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Abstract
The invention discloses a device and a method for simulating oil-gas contact reaction in the injection and production process of an underground gas storage, wherein the device comprises a small core clamping unit part, a natural gas cylinder, an intermediate container and an oil-gas-water separation device which are sequentially connected through a pipeline, and the small core clamping unit part is connected in parallel on the pipeline between the intermediate container and the oil-gas-water separation device; the oil-gas-water separation device is connected with the oil collection device, the water collection device and/or the gas collection device through pipelines. The device and the method for simulating the oil-gas contact reaction in the injection and production process of the underground gas storage can simulate the complete process of gas injection and production of the gas storage in one experiment, can simulate the contact reaction degree and the influence generated by different phase-state fluids in the operation process of the underground gas storage, can simulate basically according to actual conditions, can also freely combine according to different well cores, can directionally and continuously simulate the reaction degree of oil gas in the injection and production process, and have strong practicability.
Description
Technical Field
The invention belongs to the technical field of design experiment devices, and particularly relates to a device and a method for simulating oil-gas contact reaction in the injection and production process of an underground gas storage.
Background
A conventional reservoir, during initial deposition, has only water in the rock pores, occupying essentially 100%. After the oil body is poured in later to form an oil reservoir, the rock pores are in an oil-water two-phase state, the oil accounts for about 70 percent, and the water accounts for 30 percent, wherein the water is basically bound water, and the bound water cannot be driven away by the oil generally due to the fact that the rock is good in hydrophilicity. During the development stage, oil is usually produced in large quantities first, and then water in the reservoir is free after water injection development. As the water injection production time progresses, the production of oil gradually decreases and eventually production stops, leaving approximately 50% of the oil in the reservoir, some of which is residual oil, accounting for about 15%, and others of which is residual oil, accounting for about 45%. At this time, a technician will generally establish a gas storage reservoir at this point on the basis, and after the natural gas is injected, the residual oil in the rock pores will react with the natural gas, so that the viscosity of the viscous crude oil is reduced, and the oil-water viscosity ratio becomes smaller. In the process of gas production of the underground gas storage, part of oil with reduced viscosity near the shaft can be produced, and the part of oil brings certain economic benefit; however, the simultaneous production of oil, gas and water has a great influence on the safe and efficient operation of the underground gas storage.
In order to fully utilize the reaction effect among different fluids to improve the recovery rate of crude oil and improve the operating efficiency of an underground gas storage, the device is designed to simulate the contact reaction of oil and gas in the injection and production processes of the underground gas storage, measure different contact reaction degrees with the rock core heterogeneity under the condition of different gas injection quantities, and finally obtain a visual result so as to judge and guide site selection of a built reservoir and the size of the gas injection quantity, thereby having very important significance.
Disclosure of Invention
The invention aims to provide a device and a method for simulating oil-gas contact reaction in the injection and production process of an underground gas storage, which can simulate the contact reaction degree and the influence generated by fluid in different phases in the operation process of the underground gas storage, can simulate according to actual conditions basically, can also freely combine according to cores of different logs, and can directionally and continuously simulate the reaction degree of oil gas in the injection and production process.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a device for simulating oil-gas contact reaction in the injection and production process of an underground gas storage, which mainly comprises a small core clamping unit part, a natural gas cylinder, an intermediate container and an oil-gas-water separation device, wherein the natural gas cylinder, the intermediate container and the oil-gas-water separation device are sequentially connected through a pipeline; the oil-gas-water separation device is also connected with the oil collection device, the water collection device and/or the gas collection device through pipelines.
Optionally, a first pressure sensor and/or a gas flowmeter are/is arranged between the middle container and the small core holding unit.
Optionally, a pressure sensor II and/or a fluid detection device are arranged between the small core clamping unit part and the oil-gas-water separation device.
Optionally, an oil content detector is connected between the oil-gas-water separation device and the oil collection device.
Optionally, the device further comprises a PC terminal for signal connection with part or all of the detection components through the data transmission line.
Optionally, the oil collecting device, the water collecting device and/or the gas collecting device are themselves provided with mass metering devices.
Optionally, the oil collecting device, the water collecting device and/or the gas collecting device are provided with volume scales.
Optionally, valves are provided on some or all of the conduits used for connection between adjacent components to control the end point of flow of gas and/or liquid within the system.
Optionally, the small core holding unit part is formed by connecting a plurality of core holding units in series; the core holding unit comprises a small core holder, a resistivity probe, a pressure difference sensor and a gas flowmeter; the small core holder is internally clamped with a small core, the resistivity probe is in contact with the small core, the pressure difference sensor is connected to two ends of the small core holder, and the gas flowmeter is connected to one side of the small core holder.
Meanwhile, the invention provides a method for simulating oil-gas contact reaction in the injection and production process of the underground gas storage based on the device for simulating oil-gas contact reaction in the injection and production process of the underground gas storage, which comprises the following steps:
s1: opening the air pump, and controlling through a valve to enable the experimental gas in the natural gas bottle to only reach a pressure sensor I through a pipeline, so that the pressure of the experimental gas is stabilized at a value required by an experiment;
s2, introducing the experimental gas after pressure stabilization into the small core clamping unit part for reaction under the control of a valve, allowing the generated oil, gas and water mixture to pass through a pressure sensor II and then reach an oil-gas-water separation device, and allowing the oil, gas and water separated in the oil-gas-water separation device to enter an oil collection device, a water collection device and a gas collection device respectively;
s3, when the fluid detection device detects stable oil flow or stable gas flow, stopping injecting the experimental gas through valve control, and recording the volume and mass of the collected substances in the oil collection device, the water collection device and the gas collection device as first data;
s4, detaching the oil collecting device, the water collecting device and the gas collecting device which have collected the liquid or the gas, and reinstalling the oil collecting device, the water collecting device and the gas collecting device which have not collected the liquid or the gas inside;
s5, only discharging gas in the small core clamping unit part through valve control, and enabling the gas to enter an oil-gas-water separation device, wherein oil, gas and water separated in the oil-gas-water separation device respectively enter an oil collection device, a water collection device and a gas collection device;
s6, when the gas flow meter in the small core holding unit detects that no gas flows in the pipeline, stopping the continuous liquid or gas circulation in the pipeline through valve control, and recording the volume and mass of collected substances in the oil collecting device, the water collecting device and the gas collecting device as second data;
s7, replacing the gas injection amount of the experimental gas, and repeating the steps S1-S6 to measure the oil-gas contact reaction degree under different main gas amount conditions; or replacing a small core sample, and repeating the steps S1-S6 to measure the oil-gas contact reaction degree under the condition that the cores are different in heterogeneity.
Compared with the prior art, the invention has the following technical effects:
the device and the method for simulating the oil-gas contact reaction in the injection and production process of the underground gas storage can simulate the complete process of gas injection and production of the gas storage in one experiment, can simulate the contact reaction degree and the influence generated by different phase-state fluids in the operation process of the underground gas storage, can simulate according to actual conditions basically, can also be freely combined according to different well cores, and can directionally and continuously simulate the reaction degree of oil gas in the injection and production process.
In addition, the scheme of the invention is easy to realize, the small core has a certain specification, and a special sample does not need to be manufactured for an experimental device; and, the little rock core for the experiment can a plurality of series connections, and can require random connection according to the experiment, can effectively avoid the contingency, is favorable to improving the experiment accuracy, and the practicality is strong.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural diagram of the device for simulating the oil-gas contact reaction in the injection and production process of the underground gas storage;
FIG. 2 is a schematic structural diagram of a core holding unit in the device for simulating oil-gas contact reaction in the injection and production process of the underground gas storage according to the invention;
FIG. 3 is a schematic structural view of a first serial connection mode of core holding units according to the present invention;
FIG. 4 is a schematic structural view of a second serial connection mode of core holding units according to the present disclosure;
wherein the reference numerals are: 1. a natural gas cylinder; 2. an intermediate container; 3a to 3f, a valve; 41. a first pressure sensor; 42. a second pressure sensor; 5a to 5b, a gas flowmeter; 6. a small core holding unit part; 6a, a small core holder; 6b, a resistivity probe; 6c, a pressure difference sensor; 6d, a gas flowmeter; 7. an oil-gas-water separation device; 8. an oil collection device; 9a to 9b, a mass measuring device; 10. a water collection device; 11. a gas collection device; 12. an oil content detector; 13. a fluid detection device; 14. a PC terminal; 15. and a data transmission line.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a device and a method for simulating oil-gas contact reaction in the injection and production process of an underground gas storage, which can simulate the contact reaction degree and the influence generated by fluid in different phases in the operation process of the underground gas storage, can simulate according to actual conditions basically, can also freely combine according to cores of different logs, and can directionally and continuously simulate the reaction degree of oil gas in the injection and production process.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The first embodiment is as follows:
as shown in fig. 1, the present embodiment provides a device for simulating an oil-gas contact reaction in an injection-production process of an underground gas storage, which includes a natural gas cylinder 1, an intermediate container 2, a small core holding unit portion 6, an oil-gas-water separation device 7, an oil collection device 8 (with volume scales), a mass metering device, a water collection device 10 (with volume scales), a gas collection device 11, an oil content detector 12, a PC terminal 14, and a data transmission line 15. Wherein, natural gas bottle 1 and middle container 2 link to each other through the gas injection pipeline, and middle container 2 passes through the left end that pressure sensor 41 is connected to little rock core clamping unit part 6 through the pipe and links to each other, and another pipe is still being connected to the left end of little rock core clamping unit part 6 and is being taken out, and the right-hand member of little rock core clamping unit part 6 passes through another pipe that pressure sensor two 42 and little rock core clamping unit part 6 left end were taken out through the pipe and links to each other, and both gather and insert oil gas water separator 7. The oil outlet end of the oil-gas-water separation device 7 is connected with the injection end of an oil collection device 8 (with volume scales) with a mass metering device 9a through a conduit and an oil content detector 12, the water outlet end of the oil-gas-water separation device 7 is connected with the injection end of a water collection device 10 (with volume scales) with a mass metering device 9b through a conduit, and the gas outlet end of the oil-gas-water separation device 7 is connected with the injection end of a gas collection device 11 with a mass metering device through a conduit. The pressure sensors and the mass metering devices are connected to the PC terminal 14 via data transmission lines.
In this embodiment, as shown in fig. 1, a valve 3a is installed on a conduit between the intermediate container 2 and the first pressure sensor 41.
In this embodiment, as shown in fig. 1, a gas flow meter 5a and a valve 3b are mounted on a conduit connecting the first pressure sensor 41 and the left end of the small core holding unit portion 6.
In this embodiment, as shown in fig. 1, a fluid detection device 13 and a valve 3c are installed on the conduit between the second pressure sensor 42 and the oil-gas-water separation device 7.
In this embodiment, as shown in fig. 1, a valve 3d is installed on the conduit between the other conduit at the left end of the small core holding unit portion 6 and the oil-gas-water separation device 7.
In this embodiment, as shown in fig. 1, a valve 3e is installed on a conduit between the oil-gas-water separation device 7 and the oil content detector 12, a valve 3f is installed on a conduit between the oil-gas-water separation device and the water collection device 10 (with volume scales), and a valve 3g and a gas flow meter 5b are installed on a conduit between the oil-gas separation device and the gas collection device 11.
In this embodiment, as shown in fig. 1, the oil collecting device 8, the water collecting device 10, and the gas collecting device 11 are all detachable from the conduit and can be installed again during the experiment.
In this embodiment, as shown in fig. 2, the small core holding unit portion 6 may be formed by connecting a plurality of small core holding units in series. Each small core holding unit comprises a small core holder 6a for holding a small core, a resistivity probe 6b, a pressure difference sensor 6c and a gas flowmeter 6 d; the two ends of the small core holder 6a are connected with guide pipes, three probes of the resistivity probe 6b penetrate into the small core holder and are respectively contacted with the two ends and the middle of the small core for experiments, the pressure difference sensor 6c is connected on the guide pipes at the two ends of the small core holder 6a, the guide pipe at the right end of the small core holder 6a is connected with the gas flowmeter 6d, and the guide pipe at the right end of the gas flowmeter 6d outputs gas. The resistivity probe 6b, the pressure difference sensor 6c and the gas flowmeter 6d are all connected to the PC end 14 through data transmission lines.
In this embodiment, can adopt a plurality of series connections of a plurality of little rock cores in every little rock core clamping unit, avoid the contingency, improve the experiment accuracy. The small core has a certain specification, and a special sample does not need to be manufactured for an experimental device; the small cores can be connected in series in various ways and can be connected randomly according to experimental requirements.
In this embodiment, the valves are preferably electrically operated, and are connected to the PC terminal 14 through data transmission lines, and the opening and closing of the valves are controlled by the PC terminal 14.
In the present embodiment, the respective detecting elements such as the gas flow meter, the oil content detector 12, and the fluid detecting device 13 are also connected to the PC terminal 14 through data transmission lines.
When the device for simulating the oil-gas contact reaction in the injection and production process of the underground gas storage is adopted to simulate the oil-gas contact reaction in the injection and production process of the underground gas storage, the device mainly comprises the following working steps:
and S1, opening the air pump, opening the valve 3a, and enabling the experimental gas in the natural gas bottle 1 to pass through the first pressure sensor 41 in sequence through the conduit, so that the pressure of the experimental gas is stabilized at a value required by an experiment.
And S2, opening the valve 3b, the valve 3c, the valve 3e, the valve 3f and the valve 3g, enabling the experimental gas to enter the small core holding unit part 6, enabling the generated oil, gas and water mixture to pass through the pressure sensor II 42 through the guide pipe and then enter the oil-gas-water separation device 7, and enabling the oil, gas and water separated from the oil, gas and water to respectively enter the oil collection device 8 (with volume scales), the water collection device 10 (with volume scales) and the gas collection device 11.
S3, observing the fluid detecting device 13, when the device detects a stable oil flow or a stable gas, closing the valves 3a, 3b, 3c, 3e, 3f and 3g, and recording the volume and mass data of the collected substances in the oil collecting device 8, the water collecting device 10 and the gas collecting device 11 as the first data.
S4, the oil collecting device 8, the water collecting device 10, and the gas collecting device 11 that have collected the liquid or the gas are removed, and the oil collecting device 8, the water collecting device 10, and the gas collecting device 11 that have not collected the liquid or the gas inside are replaced.
S5, opening the valve 3d, the valve 3e, the valve 3f and the valve 3g, and separating the gas escaping from the small core holding unit part 6 into gas, oil and water in the oil-gas-water separation device 7 and collecting the gas, oil and water by three containers respectively.
S6, when the gas flowmeter 5b detects that no gas flows in the pipeline, closing the valve 3d, the valve 3e, the valve 3f and the valve 3g, recording volume and mass data of collected substances in the oil collecting device 8, the water collecting device 10 and the gas collecting device 11 at the moment as second data, and finishing a single experiment; and after the experiment, the data collected by each detection part is analyzed by the PC end to obtain the required experiment conclusion.
S7, replacing the gas injection amount of the experimental gas, and repeating the steps S1-S6 to measure the oil-gas contact reaction degree under different main gas amount conditions; or replacing a small core sample, and repeating the steps S1-S6 to measure the oil-gas contact reaction degree under the condition that the cores are different in heterogeneity.
Based on the above step S7, as shown in fig. 3 and 4, the combination of two small core holding units is adopted. Two control experiments were generated by designing A, B in each combination, each of which could be used as part of the small core holding unit shown in fig. 2, and then performing A, B two experiments separately.
Specifically, fig. 3 shows two control experiments designed under the condition that the measured small core samples are different, wherein the small cores held by the three small core holders in the group a are all in an alpha shape, the small cores held by the three small core holders in the group B are all in a beta shape, A, B two groups are all in series connection with three small core holding units, and A, B two groups have gas injection quantities of Qa. And (4) keeping other parameters unchanged, repeating the steps S1-S6 in A, B two groups of small core holders respectively, and analyzing the oil-gas contact reaction degree under the condition that the core heterogeneity is different through simulation.
In this embodiment, the combination form of the small core may be designed according to the experimental requirements, and the combination form includes, but is not limited to, the above two forms.
Example two:
the embodiment provides another method for simulating oil-gas contact reaction in the injection and production process of an underground gas storage, which is completed based on the device in the first embodiment. The only difference from example one is that this example is two control experiments designed with different amounts of injected gas. As shown in fig. 4, the gas injection amount of the group a is Qa, the gas injection amount of the group B is Qb, the A, B groups are all three small core holders connected in series, and the small cores held by the A, B groups of small core holders are all small cores produced by the same experimental sample. And (4) keeping other parameters unchanged, repeating the steps S1-S6 in A, B two groups of small core holders respectively, and analyzing the oil-gas contact reaction degree under different main gas quantity conditions through simulation.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (10)
1. A device for simulating oil-gas contact reaction in the injection and production process of an underground gas storage is characterized by comprising a small core clamping unit part, a natural gas cylinder, an intermediate container and an oil-gas-water separation device which are sequentially connected through a pipeline, wherein the small core clamping unit part is connected in parallel on the pipeline between the intermediate container and the oil-gas-water separation device; the oil-gas-water separation device is also connected with the oil collection device, the water collection device and/or the gas collection device through pipelines.
2. The device for simulating the oil-gas contact reaction in the injection and production process of the underground gas storage as claimed in claim 1, wherein a pressure sensor and/or a gas flowmeter is/are arranged between the middle container and the small core holding unit part.
3. The device for simulating the oil-gas contact reaction in the injection and production process of the underground gas storage according to claim 1, wherein a second pressure sensor and/or a fluid detection device is arranged between the small core holding unit part and the oil-gas-water separation device.
4. The device for simulating the oil-gas contact reaction in the injection and production process of the underground gas storage according to claim 1, wherein an oil content detector is connected between the oil-gas-water separation device and the oil collection device.
5. The device for simulating the oil-gas contact reaction in the injection and production process of the underground gas storage according to claim 1, further comprising a PC terminal for signal connection with part or all of the detection components through a data transmission line.
6. The device for simulating the oil-gas contact reaction in the injection and production process of the underground gas storage according to claim 1, wherein the oil collecting device, the water collecting device and/or the gas collecting device are/is provided with a mass metering device.
7. The device for simulating the oil-gas contact reaction in the injection and production process of the underground gas storage according to claim 1, wherein volume scales are arranged on the oil collecting device, the water collecting device and/or the gas collecting device.
8. The device for simulating the oil-gas contact reaction in the injection and production process of the underground gas storage according to claim 1, wherein valves are arranged on part or all of the pipelines for connecting the adjacent components.
9. The device for simulating the oil-gas contact reaction in the injection and production process of the underground gas storage according to claim 1, wherein the small core holding unit is formed by connecting a plurality of core holding units in series; the core holding unit comprises a small core holder, a resistivity probe, a pressure difference sensor and a gas flowmeter; the small core holder is internally clamped with a small core, the resistivity probe is in contact with the small core, the pressure difference sensor is connected to two ends of the small core holder, and the gas flowmeter is connected to one side of the small core holder.
10. A method for simulating oil-gas contact reaction in the injection and production process of an underground gas storage based on the device for simulating oil-gas contact reaction in the injection and production process of the underground gas storage according to any one of claims 1 to 9, which is characterized by comprising the following steps:
s1: opening the air pump, and controlling through a valve to enable the experimental gas in the natural gas bottle to only reach a pressure sensor I through a pipeline, so that the pressure of the experimental gas is stabilized at a value required by an experiment;
s2, introducing the experimental gas after pressure stabilization into the small core clamping unit part for reaction under the control of a valve, allowing the generated oil, gas and water mixture to pass through a pressure sensor II and then reach an oil-gas-water separation device, and allowing the oil, gas and water separated in the oil-gas-water separation device to enter an oil collection device, a water collection device and a gas collection device respectively;
s3, when the fluid detection device detects stable oil flow or stable gas flow, stopping injecting the experimental gas through valve control, and recording the volume and mass of the collected substances in the oil collection device, the water collection device and the gas collection device as first data;
s4, detaching the oil collecting device, the water collecting device and the gas collecting device which have collected the liquid or the gas, and reinstalling the oil collecting device, the water collecting device and the gas collecting device which have not collected the liquid or the gas inside;
s5, only discharging gas in the small core clamping unit part through valve control, and enabling the gas to enter an oil-gas-water separation device, wherein oil, gas and water separated in the oil-gas-water separation device respectively enter an oil collection device, a water collection device and a gas collection device;
s6, when the gas flow meter in the small core holding unit detects that no gas flows in the pipeline, stopping the continuous liquid or gas circulation in the pipeline through valve control, and recording the volume and mass of collected substances in the oil collecting device, the water collecting device and the gas collecting device as second data;
s7, replacing the gas injection amount of the experimental gas, and repeating the steps S1-S6 to measure the oil-gas contact reaction degree under different main gas amount conditions; or replacing a small core sample, and repeating the steps S1-S6 to measure the oil-gas contact reaction degree under the condition that the cores are different in heterogeneity.
Priority Applications (1)
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| US20100276149A1 (en) * | 2007-03-23 | 2010-11-04 | Pope Gary A | Method for Treating a Hydrocarbon Formation |
| CN102748018A (en) * | 2012-07-23 | 2012-10-24 | 中国石油天然气股份有限公司 | Device and method for thickened oil deposit gas injection huff-puff oil extraction physical simulation experiments |
| CN104975829A (en) * | 2015-06-08 | 2015-10-14 | 中国石油大学(北京) | Carbon dioxide drive oil reservoir production method capable of realizing stage control on fluidity |
| CN207194886U (en) * | 2017-09-06 | 2018-04-06 | 中国石油大学(北京) | A kind of HTHP bottom and edge water huff and puff experimental provision |
| CN111220794A (en) * | 2020-03-06 | 2020-06-02 | 山东科技大学 | Device for measuring gas loss in gas storage injection and production process |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100276149A1 (en) * | 2007-03-23 | 2010-11-04 | Pope Gary A | Method for Treating a Hydrocarbon Formation |
| CN102748018A (en) * | 2012-07-23 | 2012-10-24 | 中国石油天然气股份有限公司 | Device and method for thickened oil deposit gas injection huff-puff oil extraction physical simulation experiments |
| CN104975829A (en) * | 2015-06-08 | 2015-10-14 | 中国石油大学(北京) | Carbon dioxide drive oil reservoir production method capable of realizing stage control on fluidity |
| CN207194886U (en) * | 2017-09-06 | 2018-04-06 | 中国石油大学(北京) | A kind of HTHP bottom and edge water huff and puff experimental provision |
| CN111220794A (en) * | 2020-03-06 | 2020-06-02 | 山东科技大学 | Device for measuring gas loss in gas storage injection and production process |
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