CN109459362A - The integrated testing device and method of high temperature and pressure Water-rock interaction and gas permeability - Google Patents
The integrated testing device and method of high temperature and pressure Water-rock interaction and gas permeability Download PDFInfo
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- CN109459362A CN109459362A CN201710796544.7A CN201710796544A CN109459362A CN 109459362 A CN109459362 A CN 109459362A CN 201710796544 A CN201710796544 A CN 201710796544A CN 109459362 A CN109459362 A CN 109459362A
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- 239000011435 rock Substances 0.000 title claims abstract description 174
- 238000012360 testing method Methods 0.000 title claims abstract description 64
- 230000003993 interaction Effects 0.000 title claims abstract description 59
- 230000035699 permeability Effects 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000007789 gas Substances 0.000 claims abstract description 187
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 72
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 70
- 239000007788 liquid Substances 0.000 claims abstract description 58
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 53
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 38
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 36
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 30
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 26
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 24
- 239000011593 sulfur Substances 0.000 claims abstract description 24
- 238000009833 condensation Methods 0.000 claims description 24
- 230000005494 condensation Effects 0.000 claims description 24
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims description 22
- 239000012530 fluid Substances 0.000 claims description 18
- 239000000344 soap Substances 0.000 claims description 18
- 230000015572 biosynthetic process Effects 0.000 claims description 17
- 238000010998 test method Methods 0.000 claims description 11
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- 230000008859 change Effects 0.000 claims description 8
- 239000002699 waste material Substances 0.000 claims description 8
- 238000004458 analytical method Methods 0.000 claims description 7
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 230000010354 integration Effects 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims 1
- 241000790917 Dioxys <bee> Species 0.000 claims 1
- 229910052799 carbon Inorganic materials 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 11
- 238000004088 simulation Methods 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000000704 physical effect Effects 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 5
- 229960004424 carbon dioxide Drugs 0.000 description 26
- 238000002347 injection Methods 0.000 description 10
- 239000007924 injection Substances 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 7
- 238000002474 experimental method Methods 0.000 description 7
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- 238000001764 infiltration Methods 0.000 description 4
- 230000008595 infiltration Effects 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 239000005864 Sulphur Substances 0.000 description 3
- 239000008398 formation water Substances 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 3
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- 239000005341 toughened glass Substances 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
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- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
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- 238000001035 drying Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- DHRRIBDTHFBPNG-UHFFFAOYSA-L magnesium dichloride hexahydrate Chemical compound O.O.O.O.O.O.[Mg+2].[Cl-].[Cl-] DHRRIBDTHFBPNG-UHFFFAOYSA-L 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000005325 percolation Methods 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
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- 239000000243 solution Substances 0.000 description 1
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- 239000004575 stone Substances 0.000 description 1
- -1 sulphur Compound Chemical class 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
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- Fluid Mechanics (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
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Abstract
The invention discloses the integrated testing device and method of a kind of high temperature and pressure Water-rock interaction and gas permeability, which includes: that core holding unit interconnected and piston container are equipped with inside insulating box；Gas booster pump one end is connected with nitrogen cylinder, carbon dioxide bottle and sulfur-bearing gas cylinder respectively, and the other end is connected with piston container；Twin-tub constant pressure and flow pump is connected to piston container；Stratum water sample container both ends are connected with liquid booster pump and core holding unit respectively, and stratum water sample is injected into core holding unit；Confining pressure pumps the lower end for being connected to core holding unit, and core holding unit upper end is equipped with confining pressure relief valve.It is carried out the advantage is that: the measurement of the simulation of entire ground environment, Water-rock interaction and Gas Permeability of Cores can be applied in this integrated testing device, physical property variation that is convenient, accurate, safely and effectively measuring rock before and after Water-rock interaction under high temperature and high pressure environment, provides more data and technical support for actual production.
Description
Technical field
The present invention relates to oil-gas field development fields, permeate more particularly, to a kind of high temperature and pressure Water-rock interaction and gas
The integrated testing device and method of rate.
Background technique
With the continuous improvement that recovery ratio requires in oilfield exploitation, the research work for improving the rate of oil and gas recovery is always in weight
Weight.In recent years, carbon dioxide displacement development is swift and violent, when carbon dioxide injection is to underground, easily with the ground in surrounding formation
Layer water and rock react, to break the physico-chemical balance between water flooding and country rock.Meanwhile sour gas reservoir is in full generation
Boundary is widely distributed, so that the Exploitation research of sour gas reservoir obtains extensive concern and payes attention to.Nearest research achievement also indicates that, two
Carbonoxide and sulfurous gas interact between water flooding, formation rock after injecting oil-gas reservoir, and it is anti-to carry out physical chemistry
It answers, causes the change of fluid and rock property, cause the dissolution or precipitating of rock forming mineral, increase or reduce the hole of fluid distrbution
Gap, to influence percolation ability of the oil gas in porous media.Therefore, just seem especially for the research of Water-rock interaction in stratum
It is important.
The experiment analog study of current most of Water-rock interactions is carried out under normal temperature and pressure environment, and reality is not met
The requirement of ground environment, the conclusion obtained are not suitable for production practices.
Therefore, with reference to actual formation condition, the one of a set of high temperature and pressure Water-rock interaction and measuring gas permebility is devised
Body test device and method, it is instead of the independent role of high-temperature high-pressure reaction kettle, the simulation of entire ground environment, water rock is anti-
It answers and the measurement of Gas Permeability of Cores is applied in this integrated apparatus and carries out, and rock after the real time measure Water-rock interaction
Physical property variation, provide more data and technical support for actual production.
The information for being disclosed in background of invention part is merely intended to deepen the reason to general background technique of the invention
Solution, and it is known to those skilled in the art existing to be not construed as recognizing or imply that the information is constituted in any form
Technology.
Summary of the invention
The invention proposes the integrated testing device and method of a kind of high temperature and pressure Water-rock interaction and gas permeability,
The physical parameter under high temperature and high pressure environment before and after Water-rock interaction can conveniently, accurately, be safely and effectively measured, is actual exploitation
Production provides more data and technical support.
According to an aspect of the invention, it is proposed that a kind of integrated testing of high temperature and pressure Water-rock interaction and gas permeability
Device, the integrated testing device include:
Insulating box, the insulating box inside are equipped with core holding unit interconnected and piston container；
Gas booster pump, described gas booster pump one end are connected with nitrogen cylinder, carbon dioxide bottle and sulfur-bearing gas cylinder respectively, separately
One end is connected with the piston container；
Twin-tub constant pressure and flow pump, the twin-tub constant pressure and flow pump are connected to the piston container；
Stratum water sample container, the stratum water sample one end are connected with liquid booster pump, and the other end is connected to the rock
The left end of heart clamp holder injects stratum water sample in Xiang Suoshu core holding unit；
Confining pressure pump, the confining pressure pump are connected to the lower end of the core holding unit, and the core holding unit upper end, which is equipped with, encloses
Press relief valve.
Preferably, the integrated testing device further include:
Gas-liquid separator, the right end of the core holding unit are connected to the gas-liquid separator；
Fluid collection vials and condensation bath container, the gas-liquid separator other end are connected to the fluid collection vials and condensation
Bathe container；
It is connected with the exhaust gas with container in exhaust gas with container, the condensation bath container other end.
Preferably, the integrated testing device further include:
Back pressure container, the back pressure container are connected to the right end of the core holding unit；
Single cylinder constant pressure and flow backpressure pump and electronics soap film flowmeter, back pressure container lower end respectively with the single cylinder constant pressure
Constant current backpressure pump is connected with electronics soap film flowmeter.
Preferably, the integrated testing device further include:
First flowing valve, first flowing valve are set between the twin-tub constant pressure and flow pump and the piston container；
Second flowing valve, second flowing valve are set between the stratum water sample container and the liquid booster pump；
Third flowing valve, the third flowing valve are set between the stratum water sample container and the core holding unit；
4th flowing valve, the 4th flowing valve are set between the confining pressure pump and the core holding unit.
5th flowing valve, the 5th flowing valve are set between the core holding unit and the gas-liquid separator；
6th flowing valve, the 6th flowing valve are set between the gas-liquid separator and the fluid collection vials；
7th flowing valve, the 7th flowing valve are set between the back pressure container and the core holding unit；
8th flowing valve, the 8th flowing valve are set between the gas-liquid separator and condensation bath container；
First back-pressure valve, first back-pressure valve are set between the electronics soap film flowmeter and the back pressure container；
Second back-pressure valve, second back-pressure valve be set to the single cylinder constant pressure and flow backpressure pump and the back pressure container it
Between.
Preferably, the bottleneck of the nitrogen cylinder is successively arranged nitrogen bottle valve and nitrogen flowing valve, the carbon dioxide bottle
Bottleneck be successively arranged carbon dioxide bottle valve and carbon dioxide stream port valve, the bottleneck of the sulfur-bearing gas cylinder is successively arranged sour gas
Bottle valve and sulfur-bearing gas cylinder flowing valve.
Preferably, it is equipped between the gas booster pump and the nitrogen cylinder, carbon dioxide bottle and sulfur-bearing gas cylinder first-class
Meter, is equipped with second flowmeter between the stratum water sample container and the core holding unit, container and described is bathed in the condensation
Third flowmeter is equipped in exhaust gas between container.
Preferably, blow valve is equipped between the piston container and the gas booster pump.
According to another aspect of the invention, it is proposed that a kind of integrated test of high temperature and pressure Water-rock interaction and gas permeability
Method for testing, which comprises
Rock core to be tested is chosen, and is pressurizeed to the rock core to be tested, until the rock core overlying formation pressure to be tested
Reach 10-80MPa to stop；
Stratum water sample is injected in the rock core to be tested, the rock core saturation to be tested is made；
Sour gas is injected into the rock core to be tested；
Water-rock interaction is carried out in the environment of simulated formation high temperature and pressure.
Preferably, the preparation of the measuring gas permebility method includes:
After the Water-rock interaction, waste liquid and exhaust gas in rock core to be tested described in displacement, and by the waste liquid and useless
The processing of gas centralized collection；
The rock core to be tested is dried, is prepared for the test of gas permeability.
Preferably, the measuring gas permebility includes:
Step 1, it presses to the rock core both ends to be tested, and stablizes the both ends pressure difference；
Step 2, the gas flow for passing through the rock core to be tested in the unit time is obtained, it is repeated multiple times, obtain gas stream
The average value of amount；
Step 3, change the pressure at the rock core both ends to be tested, obtain being averaged for the gas flow under the pressure difference
Value；
Step 4, step 3 is repeated several times, obtains gas permeability of the rock core both ends to be tested under different pressure differences；
Step 5, before and after comparing the Water-rock interaction, the variation of the gas permeability of the rock core to be tested obtains analysis
As a result.
The integrated testing device and method of a kind of high temperature and pressure Water-rock interaction and gas permeability according to the present invention,
Advantage is: the measurement of the simulation of entire ground environment, Water-rock interaction and Gas Permeability of Cores can be applied to this
It is carried out in integrated testing device, can conveniently, accurately, safely and effectively measure Water-rock interaction front and back rock under high temperature and high pressure environment
The physical property of stone changes, and provides more data and technical support for actual production；This method changes rock core by back pressure adjusting
Both ends pressure difference is come the gas permeability tested under different pressure differences, Water-rock interaction under real simulation ground environment, and research water rock is anti-
Cope with the influence in physical properties of rock.
The device of the invention and method have other characteristics and advantages, these characteristics and advantages are attached from what is be incorporated herein
It will be apparent in figure and subsequent specific embodiment, or will be in the attached drawing and subsequent specific implementation being incorporated herein
It is stated in detail in example, these the drawings and specific embodiments are used together to explain specific principle of the invention.
Detailed description of the invention
Exemplary embodiment of the present is described in more detail in conjunction with the accompanying drawings, of the invention is above-mentioned and other
Purpose, feature and advantage will be apparent, wherein in exemplary embodiments of the present invention, identical appended drawing reference is usual
Represent same parts.
Fig. 1 shows a kind of high temperature and pressure Water-rock interaction and the gas infiltration of an exemplary embodiment according to the present invention
The structural schematic diagram of the integrated testing device of rate.
Fig. 2 shows a kind of high temperature and pressure Water-rock interactions of an exemplary embodiment according to the present invention and gas infiltration
The step flow chart of the integrated test method for testing of rate.
Description of symbols:
1, nitrogen cylinder；2, carbon dioxide bottle；3, sulfur-bearing gas cylinder；4, nitrogen bottle valve；5, carbon dioxide cylinder valve；6, sour gas
Bottle valve；7, nitrogen flowing valve；8, carbon dioxide stream port valve；9, sulphur gas cylinder flowing valve；10, first flowmeter；11, gas boosting
Pump；12, twin-tub constant pressure and flow pumps；13, the first flowing valve；14, liquid booster pump；15, the second flowing valve；16, stratum water sample holds
Device；17, third flowing valve；18, second flowmeter；19, first piston container；20, second piston container；21, blow valve；22,
Confining pressure relief valve；23, core holding unit；24, the 4th flowing valve；25, confining pressure pumps；26, insulating box；27, the 5th flowing valve；28,
Gas-liquid separator；29, the 6th flowing valve；30, fluid collection vials；31, the 7th flowing valve；32, the first back pressure container；33, first
Air outlet valve；34, the second air outlet valve；35, the second back pressure container；36, the 8th flowing valve；37, condensation bath container；38, third flow
Meter；39, in exhaust gas and container；40, the first back-pressure valve；41, the second back-pressure valve；42, single cylinder constant pressure and flow backpressure pump；43, electronics
Soap film flowmeter；44, the first gas injection valve；45, the second gas injection valve.
Specific embodiment
The present invention will be described in more detail below with reference to accompanying drawings.Although showing the preferred embodiment of the present invention in attached drawing,
However, it is to be appreciated that may be realized in various forms the present invention and should not be limited by the embodiments set forth herein.On the contrary, providing
These embodiments are of the invention more thorough and complete in order to make, and can will fully convey the scope of the invention to ability
The technical staff in domain.
The present invention provides the integrated testing device of a kind of high temperature and pressure Water-rock interaction and gas permeability, the integrations
Test device includes:
Insulating box, insulating box inside are equipped with core holding unit interconnected and piston container；
Gas booster pump, gas booster pump one end are connected with nitrogen cylinder, carbon dioxide bottle and sulfur-bearing gas cylinder respectively, the other end
It is connected with piston container；
Twin-tub constant pressure and flow pump, twin-tub constant pressure and flow pump are connected to piston container；
Stratum water sample container, stratum water sample one end are connected with liquid booster pump, and the other end is connected to core holding unit
Left end, into core holding unit inject stratum water sample；
Confining pressure pump, confining pressure pump the lower end for being connected to core holding unit, and core holding unit upper end is equipped with confining pressure relief valve.
Wherein, the bottleneck of nitrogen cylinder is successively arranged nitrogen bottle valve and nitrogen flowing valve, and the bottleneck of carbon dioxide bottle is successively
Equipped with carbon dioxide bottle valve and carbon dioxide stream port valve, the bottleneck of sulfur-bearing gas cylinder is successively arranged sulfur-bearing gas cylinder valve and sour gas
Bottle flowing valve.
Gas cylinder valve opens or closes each gas cylinder, and flowing valve is used to control the circulation of gas in each gas cylinder.
Preferably, piston container includes first piston container and second piston container, is set on first piston container
There is the first gas injection valve, second piston container is equipped with the second gas injection valve.
Wherein, nitrogen cylinder, carbon dioxide bottle are connected by pipeline with gas booster pump with sulfur-bearing gas cylinder, and gas booster pump adds
It presses and is inflated to piston container, twin-tub constant pressure and flow pump is also connected with piston container, can select constant voltage mode, persistently presss from both sides to rock core
Rock core constant pressure in holder.
It is connected below the water sample container of stratum with liquid booster pump, top is connected with core holding unit, in core holding unit
Rock core fill quantitative stratum water sample, simulated formation water environment.
Preferably, integrated testing device further include:
The right end of gas-liquid separator, core holding unit is connected to gas-liquid separator；
Fluid collection vials and condensation bath container, the gas-liquid separator other end are connected to fluid collection vials and condensation bath container；
It is connected with exhaust gas with container in exhaust gas with container, the condensation bath container other end.
Further, integrated testing device further include:
Back pressure container, back pressure container are connected to the right end of core holding unit；
Single cylinder constant pressure and flow backpressure pump and electronics soap film flowmeter, back pressure container lower end respectively with single cylinder constant pressure and flow back pressure
Pump is connected with electronics soap film flowmeter.
Wherein, back pressure container includes the first back pressure container and the second back pressure container, is equipped with first above the first back pressure container
Air outlet valve, the second back pressure container top are equipped with the second air outlet valve.
Wherein, it is connected below core holding unit with confining pressure pump, right end is connected with gas-liquid separation container.Under gas-liquid separation container
Side ins succession fluid collection vials, the water flooding gone out for collecting displacement, right end in succession condensation bath container, in exhaust gas and container, be used for
Acid waste gas is cooled down and neutralizes, back pressure container of ining succession above gas-liquid separation container, for providing gas back pressure.
Back pressure container right end is ined succession back-pressure valve and single cylinder constant pressure and flow backpressure pump, for providing outlet port of rock core holder
Back pressure, and keep pressure to stablize by back pressure container, back pressure container right end is ined succession electronics soap film flowmeter, can be with automatic gauge list
The gas flow that the position time is flowed through.
Core holding unit acts as the effect of high-temperature high-pressure reaction kettle, provides water flooding to rock core by stratum water sample container
Gas in environment, carbon dioxide bottle or sulfur-bearing gas cylinder is filled in core holding unit under gas booster pump pressurization, permanent
Incubator simulated formation hot environment, Water-rock interaction of the simulated formation water middle acid substance under the ground environment of high temperature and pressure.
Nitrogen cylinder and twin-tub constant pressure and flow pump, piston container, core holding unit, confining pressure pump, back pressure container, single cylinder constant pressure and constant
It flows back to press pump, electronics soap film flowmeter etc. and constitutes the device of a set of precise measurement gas permeability.Wherein core holding unit gas
The piston container of body entrance and the back pressure container of outlet end, which have, continues voltage stabilizing function, so that the pressure difference simulation at rock core both ends is more
Add precisely.
Preferably, condensation is bathed in container and exhaust gas and external container is equipped with isolation tempered glass cover, and tempering is isolated
Cloche is equipped with sulfurous gas leakage alarm.
Preferably, integrated testing device further include:
First flowing valve, the first flowing valve are set between twin-tub constant pressure and flow pump and piston container；
Second flowing valve, the second flowing valve are set between stratum water sample container and liquid booster pump；
Third flowing valve, third flowing valve are set between stratum water sample container and core holding unit；
4th flowing valve, the 4th flowing valve are set between confining pressure pump and core holding unit.
5th flowing valve, the 5th flowing valve are set between core holding unit and gas-liquid separator；
6th flowing valve, the 6th flowing valve are set between gas-liquid separator and fluid collection vials；
7th flowing valve, the 7th flowing valve are set between back pressure container and core holding unit；
8th flowing valve, the 8th flowing valve are set between gas-liquid separator and condensation bath container；
First back-pressure valve, the first back-pressure valve are set between electronics soap film flowmeter and back pressure container；
Second back-pressure valve, the second back-pressure valve are set between single cylinder constant pressure and flow backpressure pump and back pressure container.
Each valve is used to control the opening and closing of various pieces.
Preferably, first flow is equipped between gas booster pump and nitrogen cylinder, carbon dioxide bottle and sulfur-bearing gas cylinder
Meter is equipped with second flowmeter, sets between container in condensation bath container and exhaust gas between stratum water sample container and core holding unit
There is third flowmeter.
First flowmeter is used to count the fluid flow passed through for counting the gas flow passed through, second flowmeter, the
Three flowmeters are used to count the flow of the exhaust gas of discharge.
The integrated testing device is by the measurement of the simulation of entire ground environment, Water-rock interaction and Gas Permeability of Cores
It concentrates and carries out, the physical property that can conveniently, accurately, safely and effectively measure rock before and after Water-rock interaction under high temperature and high pressure environment becomes
Change, provides more data and technical support for actual production.
The present invention also provides the integrated test method for testing of a kind of high temperature and pressure Water-rock interaction and gas permeability, wherein
Water-rock interaction test method includes:
Rock core to be tested is chosen, and treats testing rock core pressurization, until rock core overlying formation pressure to be tested reaches 10-
80MPa stops；
Stratum water sample is injected in rock core to be tested, rock core to be tested is saturated；
Sour gas is injected into rock core to be tested in proportion；
Water-rock interaction is carried out in the environment of simulated formation high temperature and pressure.
Wherein, it is 1:(1-3 according to the volume ratio of H2S, CO2 and CH4): (1.5-18) injects acid into rock core to be tested
Gas.
Before experiment, rock core to be tested is ready to, and by the rock core to be tested of via hole porosity and permeability after tested
It cleans out, and records the gentle survey Permeability Parameters of porosity of rock core to be tested before good test, by rock core to be tested in room temperature
It is fitted into core holding unit under normal pressure, connects test device, and check device air-tightness according to experiment process.
Specifically, comprising:
It opens confining pressure and pumps flowing valve, starting confining pressure pump sets confining pressure pump initial pressure as 5-10MPa, then persistently gives rock
Rock core to be tested pressurization in heart clamp holder, until rock overlying formation pressure numerical value stops, holding confining pressure pump pressure is constant,
The overlying formation pressure effect that rock is subject in real simulation ground environment；
Confining pressure relief valve is opened, the gas in core holding unit is discharged, then tightens；
The third flowing valve of opening stratum water sample container and the second flowing valve of liquid booster pump, start liquid booster pump,
Stratum water sample is filled into core holding unit by way of to liquid pressing, and observes the liquid flowed through in second flowmeter
Amount；
The carbon dioxide bottle valve of carbon dioxide bottle or the sulfur-bearing gas cylinder valve of sulfur-bearing gas cylinder are opened, the nitrogen of nitrogen cylinder is opened
The flowing valve of gas cylinder valve and each gas cylinder starts gas booster pump, and the volume ratio according to H2S, CO2 and CH4 is 1:(1-3):
Sour gas and nitrogen are filled in core holding unit by the ratio of (1.5-18), and observe the gas flowed through in first flowmeter
Amount；
Insulating box switch is opened, set temperature is 100-200 DEG C of formation temperature of experiment and keeps constant, and gives rock core to be tested
Heat temperature raising makes rock core to be tested carry out Water-rock interaction in the core holding unit of the acid ground environment of high temperature and pressure；
Stand 72 hours or more, it waits testing rock core Water-rock interaction in core holding unit complete, is kept during standing
Gas, fluid connection and supply, the pump pressure of gas booster pump, liquid booster pump and confining pressure pump remain constant.
Preferably, the preparation of body permeability test method includes:
After Water-rock interaction, waste liquid and exhaust gas in displacement rock core to be tested, and will be at waste liquid and exhaust gas centralized collection
Reason；
Rock core to be tested is dried, is prepared for the test of gas permeability.
Specifically, comprising:
What the second flowing valve of closing liquid booster pump after having reacted, closing carbon dioxide bottle valve or closing had been opened contains
Sulphur gas cylinder valve；
It keeps nitrogen bottle valve and nitrogen flowing valve to open wide, opens the 5th flowing valve of gas-liquid separator upper end, open liquid
6th flowing valve of body receiving flask upper end and the 8th flowing valve on right side, are expelled under gas booster pump pressurization with nitrogen
Sour gas and displacement in pipeline go out stratum water sample and sour gas in core holding unit, make in gas-liquid separation container
Under, liquid is collected by fluid collection vials, gas is cooling by condensation bath container and carries out in the offgas with container
It neutralizes, prevents sour gas from escaping, third flowmeter measures the acid gas quantity passed through；
After displacement is complete, nitrogen bottle valve is closed, closes gas booster pump and confining pressure pump, confining pressure relief valve is opened and lays down
Confining pressure closes open each flowing valve, and 100-200 DEG C of calorstat temperature keeps constant 20-50 hours, and it is right to dry rock core to be tested
Insulating box switch is closed afterwards, is the measurement preparatory condition of gas permeability.
Preferably, measuring gas permebility includes:
Step 1, testing rock core both ends pressure is treated, and stablizes both ends pressure difference；
Step 2, the gas flow for passing through rock core to be tested in the unit time is obtained, it is repeated multiple times, obtain gas flow
Average value；
Step 3, change the pressure at rock core both ends to be tested, obtain the average value of the gas flow under the pressure difference；
Step 4, step 3 is repeated several times, obtains gas permeability of the rock core both ends to be tested under different pressure differences；
Step 5, before and after comparison Water-rock interaction, the variation of the gas permeability of rock core to be tested obtains analysis result.
Before measuring gas permebility, upper soap lye is dipped in clean writing brush, checks the air-tightness of each pipeline valve.
Specifically, comprising:
It opens confining pressure and pumps the 4th flowing valve of upper end, starting confining pressure pump sets confining pressure pump pressure and provides to press as gas permeability
Power 5-10MPa；
Nitrogen bottle valve and nitrogen flowing valve are opened, gas booster pump is started, opens the first gas injection valve and the second gas injection valve,
It is pressurizeed by gas booster pump and gives piston container gas injection, be full of entire piston container, stablize rock to be tested by piston container
Heart both ends pressure difference；
The 7th flowing valve and the first air outlet valve of opening back pressure container left end and the second air outlet valve；
Confining pressure relief valve is opened, the air in core holding unit is discharged, then tightens；
It opens twin-tub constant pressure and flow and pumps the first flowing valve of upper end, starting twin-tub constant pressure and flow pump is set as constant voltage mode, presses
Power is set as displacement pressure 0.5-4MPa as defined in gas permeability；
Start single cylinder constant pressure and flow backpressure pump, provides steady pressure to rock core outlet end to be tested by back pressure container；
The first back-pressure valve of electronics soap film flowmeter upper end is opened, is flowed through by the electronics soap film flowmeter measurement unit time
Gas flow repeated measurement five times, seeks average flow rate；
The pressure for adjusting single cylinder constant pressure and flow backpressure pump, declines certain unit pressure, and the measurement unit time passes through again
The gas flow of electronics soap film flowmeter, pressure of every adjusting, needs the repeated measurement on the pressure-based more than five times, to ask
Take average flow Q0, according to Darcy formula, gas permeability calculation formula are as follows:
In formula, K is gas permeability, 10-3μm2；
A is rock sample sectional area, cm2；
L is rock sample length, cm；
P1, P2- core entry end and outlet end atmospheric pressure, 0.1MPa；
P0For atmospheric pressure, 0.1MPa；
μ is the viscosity of gas, mPas；
Q0For (average) flow measured under atmospheric pressure, cm3/s；
It repeats previous step at least 3 times, measures the gas permeability under rock core both ends difference pressure difference to be tested, and complete every
Secondary flow measurement test.
After test, nitrogen bottle valve is closed, closes gas booster pump and confining pressure pump, confining pressure relief valve is opened and lays down and enclose
Pressure closes twin-tub constant pressure and flow pump, single cylinder constant pressure and flow backpressure pump, opens blow valve, lay down gas pressure in pipeline, take out to
Testing rock core retains experiment sample, puts instrument and equipment in order.
The gas that the integrated test method for testing changes rock core both ends pressure difference by back pressure adjusting to test under different pressure differences
Permeability, the Water-rock interaction under real simulation ground environment, influence of the research Water-rock interaction for physical properties of rock.
Embodiment
Fig. 1 shows a kind of high temperature and pressure Water-rock interaction and the gas infiltration of an exemplary embodiment according to the present invention
The structural schematic diagram of the integrated testing device of rate.
As shown in Figure 1, the integrated testing device of a kind of the high temperature and pressure Water-rock interaction and gas permeability of the present embodiment,
Include:
Insulating box 26 is equipped with core holding unit 23 interconnected and piston container inside insulating box 26；
Gas booster pump 11,11 one end of gas booster pump respectively with 3 phase of nitrogen cylinder 1, carbon dioxide bottle 2 and sulfur-bearing gas cylinder
Even, the other end is connected with piston container；
Twin-tub constant pressure and flow pump 12, twin-tub constant pressure and flow pump 12 are connected to piston container, and twin-tub constant pressure and flow pumps 12 and lives
It fills in and is equipped with the first flowing valve 13 between container；
Stratum water sample container 16,16 one end of stratum water sample container are connected with liquid booster pump 14, stratum water sample container 16 with
The second flowing valve 15 is equipped between liquid booster pump 14, the other end is connected to the left end of core holding unit 23, to core holding unit
Stratum water sample is injected in 23, and third flowing valve 17 is equipped between stratum water sample container 16 and core holding unit 23；
Confining pressure pump 25, confining pressure pump 25 is connected to the lower end of core holding unit 23, between confining pressure pump 25 and core holding unit 23
Equipped with the 4th flowing valve 24,23 upper end of core holding unit is equipped with confining pressure relief valve 22；
Gas-liquid separator 28, the right end of core holding unit 23 are connected to gas-liquid separator 28, core holding unit 23 and gas-liquid
The 5th flowing valve 27 is equipped between separator 28,28 other end of gas-liquid separator is connected to fluid collection vials 30 and condensation bath container
37, condensation bath 37 other end of container is connected with exhaust gas with container 39, is equipped between gas-liquid separator 28 and fluid collection vials 30
6th flowing valve 29 is equipped with the 8th flowing valve 36 between gas-liquid separator 28 and condensation bath container 37；
Back pressure container, back pressure container is connected to the right end of core holding unit 23,23 between back pressure container and core holding unit
Equipped with the 7th flowing valve 31, back pressure container lower end respectively with 43 phase of single cylinder constant pressure and flow backpressure pump 42 and electronics soap film flowmeter
Even, the second back-pressure valve 41, electronics soap film flowmeter 43 and back pressure are equipped between single cylinder constant pressure and flow backpressure pump 42 and back pressure container
The first back-pressure valve 40 is equipped between container.
Further, the bottleneck of nitrogen cylinder 1 is successively arranged nitrogen bottle valve 4 and nitrogen flowing valve 7, carbon dioxide bottle 2
Bottleneck is successively arranged carbon dioxide bottle valve 5 and carbon dioxide stream port valve 8, and the bottleneck of sulfur-bearing gas cylinder 3 is successively arranged sulfur-bearing gas cylinder
Valve 6 and sulfur-bearing gas cylinder flowing valve 9.
Further, piston container includes first piston container 19 and second piston container 20, on first piston container 19
Equipped with the first gas injection valve 44, second piston container 20 is equipped with the second gas injection valve 45.
Further, back pressure container includes the first back pressure container 32 and the second back pressure container 35, on the first back pressure container 32
Side is equipped with the first air outlet valve 33, is equipped with the second air outlet valve 34 above the second back pressure container 35.
Further, isolation tempered glass cover is bathed in container 37 and exhaust gas and is equipped with outside container 39 in condensation, and tempering is isolated
Cloche is equipped with sulfurous gas leakage alarm.
Further, first flow is equipped between gas booster pump 11 and nitrogen cylinder 1, carbon dioxide bottle 2 and sulfur-bearing gas cylinder 3
Meter 10, is equipped with second flowmeter 18 between stratum water sample container 16 and core holding unit 23, condensation bath container 37 and exhaust gas neutralize
It is equipped with third flowmeter 38 between container 39, blow valve 21 is equipped between piston container and gas booster pump 11.
Fig. 2 shows a kind of high temperature and pressure Water-rock interactions of an exemplary embodiment according to the present invention and gas infiltration
The step flow chart of the integrated test method for testing of rate.
As shown in Fig. 2, according to the one of a kind of high temperature and pressure Water-rock interaction of above-mentioned apparatus the present embodiment and gas permeability
Body test method, comprising:
Rock core to be tested is chosen, and treats testing rock core pressurization, until rock core overlying formation pressure to be tested reaches 50MPa
Stop；
Stratum water sample is injected in rock core to be tested, rock core to be tested is saturated；
Sour gas is injected into rock core to be tested in the ratio that the volume ratio of H2S, CO2 and CH4 are 1:1:18；
Water-rock interaction is carried out in the environment of simulated formation high temperature and pressure；
After Water-rock interaction, waste liquid and exhaust gas in displacement rock core to be tested, and will be at waste liquid and exhaust gas centralized collection
Reason；
Rock core to be tested is dried, is prepared for the test of gas permeability；
Testing rock core both ends pressure is treated, and stablizes both ends pressure difference；
The gas flow for passing through rock core to be tested in the unit time is obtained, it is repeated multiple times, obtain the average value of gas flow；
Change the pressure at rock core both ends to be tested, obtains the average value of the gas flow under the pressure difference；
It repeats previous step three times, obtains gas permeability of the rock core both ends to be tested under different pressure differences；
Before and after comparing Water-rock interaction, the variation of the gas permeability of rock core to be tested obtains analysis result.
The present embodiment is using first dam rock core, and the size of first dam rock core is φ 25mm × 50mm, and liquid medium provides for certain side
Live water flooding, or simulated formation aqueous solution is prepared according to first dam rock sample this actual formation water data, concrete component is shown in Table
1-1 prepares water flooding reagent dosage and is shown in Table 1-2.
Table 1-1 water flooding ion analysis detects (chloride-calcium type)
Table 1-2 prepares water flooding reagent dosage
| Reagent | Dosage |
| CaCl2 | 74.2 |
| MgCl2.6H2O | 107.2 |
| NaHCO3 | 1.7 |
| NaCl | 16.9 |
Experiment main agents used have H2S、CO2、CH4Deng as shown in table 2.
Laboratory apparatus is high temperature and pressure dynamic kettle and Oil in Super-low Permeability gas permeability measuring instrument.
Choose CO2And H2Two kinds of sour gas of S, first dam rock core is fracture rock core, in 125 DEG C of formation temperature, pressure
The variation of differential responses time (3 time points) front and back reservoir permeability is measured under 50MPa, research Water-rock interaction permeates reservoir
The influence mode and influence degree of rate.
2 major experimental reagent of table
Test design parameter: 125 DEG C of temperature, pressure 50MPa, H in reaction atmosphere2The volume of S is 5%, CO2Volume be
5%, CH4Volume be 90%, experimental group situation is as shown in table 3.
3 experimental group situation of table
(1) rock sample prepares
Required rock sample is processed into φ 25mm × 50mm, 2 rock samples are taken under every group of experiment condition, wherein 1 is permeability
Test, 1 is done lacunarity analysis, after 100 DEG C of dryings of rock sample, is stored into drier.
(2) rock sample impregnates
Ready 4000mL water flooding is packed into high temperature and pressure core holding unit, rock sample (vacuum processing) rock core is pressed from both sides
It in holder, seals, rock sample component is placed in water flooding and fixes, and connects pipeline, closes air outlet valve.It is passed through N21h, rock is discharged
Air in heart clamp holder.Then successively it is passed through H2S、CO2、CH4Gas volume group in core holding unit is set to become 5%H2S, 5%
CO2, 90%CH4, after reaching test setting gross pressure, close air intake valve.It starts to warm up, connects computer data line, start to adopt
Collect experimental data, after being reacted to the predetermined time, cuts off the power.Rock sample is taken out, and ion analysis is carried out to the water flooding after reaction.
(3) permeability and porosity test
After 100 DEG C of rock sample dry 48h after immersion, permeability, porosity are carried out in Oil in Super-low Permeability gas permeability measuring instrument
Test, as shown in table 4.
4 rock core of table reaction front and back weight
| Rock core | Weight (g) before reacting | Weight (g) after reaction | Variable quantity (g) | Change rate (%) |
| First 224-1 | 51.8876 | 51.9862 | 0.095 | 0.2 |
Note: the weight for reacting front and back weighs 3 times, is averaged
As shown in Table 4, the rock core weight after reaction increases 0.095g, and amplification reaches 0.2%.The reason of rock core weight increases
It may be water flooding intermediate ion (Ca2+、Mg2+) with the sour gas (CO that is dissolved in the water2、H2S it) reacts, generates carbonate or sulphur
Compound precipitation capacity is greater than meltage, is deposited in the hole of rock core.
The embodiment of the present invention is described above, above description is exemplary, and non-exclusive, and also not
It is limited to disclosed embodiment.Without departing from the scope and spirit of embodiment described, for the art
Those of ordinary skill for many modifications and changes are obvious.The selection of term used herein, it is intended to best
Principle, practical application or the improvement to the technology in market of embodiment are explained in ground, or make the other common of the art
Technical staff can understand embodiments disclosed herein.
Claims (10)
1. the integrated testing device of a kind of high temperature and pressure Water-rock interaction and gas permeability, which is characterized in that the integration
Test device includes:
Insulating box, the insulating box inside are equipped with core holding unit interconnected and piston container；
Gas booster pump, described gas booster pump one end are connected with nitrogen cylinder, carbon dioxide bottle and sulfur-bearing gas cylinder respectively, the other end
It is connected with the piston container；
Twin-tub constant pressure and flow pump, the twin-tub constant pressure and flow pump are connected to the piston container；
Stratum water sample container, the stratum water sample one end are connected with liquid booster pump, and the other end is connected to the rock core folder
The left end of holder injects stratum water sample in Xiang Suoshu core holding unit；
Confining pressure pump, the confining pressure pump are connected to the lower end of the core holding unit, and the core holding unit upper end is let out equipped with confining pressure
Pressure valve.
2. the integrated testing device of high temperature and pressure Water-rock interaction according to claim 1 and gas permeability, wherein institute
State integrated testing device further include:
Gas-liquid separator, the right end of the core holding unit are connected to the gas-liquid separator；
Fluid collection vials and condensation bath container, the gas-liquid separator other end is connected to the fluid collection vials and condensation bath is held
Device；
It is connected with the exhaust gas with container in exhaust gas with container, the condensation bath container other end.
3. the integrated testing device of high temperature and pressure Water-rock interaction according to claim 1 and gas permeability, wherein institute
State integrated testing device further include:
Back pressure container, the back pressure container are connected to the right end of the core holding unit；
Single cylinder constant pressure and flow backpressure pump and electronics soap film flowmeter, back pressure container lower end respectively with the single cylinder constant pressure and flow
Backpressure pump is connected with electronics soap film flowmeter.
4. the integrated test trial assembly of high temperature and pressure Water-rock interaction and gas permeability according to claim 1 to 3
It sets, wherein the integrated testing device further include:
First flowing valve, first flowing valve are set between the twin-tub constant pressure and flow pump and the piston container；
Second flowing valve, second flowing valve are set between the stratum water sample container and the liquid booster pump；
Third flowing valve, the third flowing valve are set between the stratum water sample container and the core holding unit；
4th flowing valve, the 4th flowing valve are set between the confining pressure pump and the core holding unit.
5th flowing valve, the 5th flowing valve are set between the core holding unit and the gas-liquid separator；
6th flowing valve, the 6th flowing valve are set between the gas-liquid separator and the fluid collection vials；
7th flowing valve, the 7th flowing valve are set between the back pressure container and the core holding unit；
8th flowing valve, the 8th flowing valve are set between the gas-liquid separator and condensation bath container；
First back-pressure valve, first back-pressure valve are set between the electronics soap film flowmeter and the back pressure container；
Second back-pressure valve, second back-pressure valve are set between the single cylinder constant pressure and flow backpressure pump and the back pressure container.
5. the integrated testing device of high temperature and pressure Water-rock interaction according to claim 1 and gas permeability, wherein institute
The bottleneck for stating nitrogen cylinder is successively arranged nitrogen bottle valve and nitrogen flowing valve, and the bottleneck of the carbon dioxide bottle is successively arranged dioxy
Change carbon bottle valve and carbon dioxide stream port valve, the bottleneck of the sulfur-bearing gas cylinder are successively arranged sulfur-bearing gas cylinder valve and sulfur-bearing gas cylinder stream
Port valve.
6. the integrated testing device of high temperature and pressure Water-rock interaction according to claim 1 and gas permeability, wherein institute
It states and is equipped with first flowmeter, the stratum water sample between gas booster pump and the nitrogen cylinder, carbon dioxide bottle and sulfur-bearing gas cylinder
It is equipped with second flowmeter between container and the core holding unit, is set between container in the condensation bath container and the exhaust gas
There is third flowmeter.
7. the integrated testing device of high temperature and pressure Water-rock interaction according to claim 1 and gas permeability, wherein institute
It states and is equipped with blow valve between piston container and the gas booster pump.
8. the integrated test method for testing of a kind of high temperature and pressure Water-rock interaction and gas permeability, using any in claim 1-7
A kind of integrated testing device of high temperature and pressure Water-rock interaction and gas permeability described in one, wherein the Water-rock interaction
Test method includes:
Rock core to be tested is chosen, and is pressurizeed to the rock core to be tested, until the rock core overlying formation pressure to be tested reaches
10-80MPa stops；
Stratum water sample is injected in the rock core to be tested, the rock core saturation to be tested is made；
Sour gas is injected into the rock core to be tested；
Water-rock interaction is carried out in the environment of simulated formation high temperature and pressure.
9. the integrated test method for testing of high temperature and pressure Water-rock interaction according to claim 8 and gas permeability, wherein institute
The preparation for stating measuring gas permebility method includes:
After the Water-rock interaction, waste liquid and exhaust gas in rock core to be tested described in displacement, and by the waste liquid and exhaust gas centralized
Middle collection processing；
The rock core to be tested is dried, is prepared for the test of gas permeability.
10. the integrated test method for testing of high temperature and pressure Water-rock interaction according to claim 9 and gas permeability, wherein
The measuring gas permebility includes:
Step 1, it presses to the rock core both ends to be tested, and stablizes the both ends pressure difference；
Step 2, the gas flow for passing through the rock core to be tested in the unit time is obtained, it is repeated multiple times, obtain gas flow
Average value；
Step 3, change the pressure at the rock core both ends to be tested, obtain the average value of the gas flow under the pressure difference；
Step 4, step 3 is repeated several times, obtains gas permeability of the rock core both ends to be tested under different pressure differences；
Step 5, before and after comparing the Water-rock interaction, the variation of the gas permeability of the rock core to be tested obtains analysis result.
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