CN106596377A - Sealed shale gas flow testing method and device - Google Patents
Sealed shale gas flow testing method and device Download PDFInfo
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- CN106596377A CN106596377A CN201611194324.9A CN201611194324A CN106596377A CN 106596377 A CN106596377 A CN 106596377A CN 201611194324 A CN201611194324 A CN 201611194324A CN 106596377 A CN106596377 A CN 106596377A
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- 238000012360 testing method Methods 0.000 title claims abstract description 39
- 239000007789 gas Substances 0.000 claims abstract description 50
- 239000011435 rock Substances 0.000 claims abstract description 37
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 34
- 238000000034 method Methods 0.000 claims abstract description 21
- 239000003345 natural gas Substances 0.000 claims abstract description 17
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 6
- 239000011148 porous material Substances 0.000 claims abstract description 5
- 230000003068 static effect Effects 0.000 claims abstract description 4
- 238000006073 displacement reaction Methods 0.000 claims description 16
- 238000009434 installation Methods 0.000 claims description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 230000008859 change Effects 0.000 claims description 11
- 238000010998 test method Methods 0.000 claims description 10
- 238000002474 experimental method Methods 0.000 claims description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 230000009467 reduction Effects 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 241000208340 Araliaceae Species 0.000 claims description 3
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 claims description 3
- 235000003140 Panax quinquefolius Nutrition 0.000 claims description 3
- 235000008434 ginseng Nutrition 0.000 claims description 3
- 239000005416 organic matter Substances 0.000 claims description 3
- 238000005325 percolation Methods 0.000 claims description 3
- 238000010792 warming Methods 0.000 claims description 3
- 238000011161 development Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 4
- 238000004088 simulation Methods 0.000 abstract description 4
- 230000000704 physical effect Effects 0.000 abstract 1
- 230000035699 permeability Effects 0.000 description 18
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 2
- 238000007872 degassing Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000002336 sorption--desorption measurement Methods 0.000 description 2
- 208000010392 Bone Fractures Diseases 0.000 description 1
- 206010017076 Fracture Diseases 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035945 sensitivity Effects 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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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a sealed shale gas flow testing method and device. The method includes the following steps that shale gas reservoir rock is collected, a natural core is manufactured, physical property parameters are tested, and gas reservoir static feature parameters are collected; a simulation device is installed to fill the core; the device is vacuumized, the device is filled with natural gas till formation pore pressure (formation pressure) confining pressure is gas reservoir overburden pressure; the temperature of a constant-temperature box is increased to a specific temperature; the experimental process starts; pressure difference generated during seepage of gas in the core under different flows is tested under an original formation condition, and a seepage feature curve is drawn. Shape gas flow seepage characteristics in the gas reservoir development process are researched through a physical simulation method, and seepage capacity of shale gas is measured.
Description
Technical field
The present invention relates to shale gas reservoir exploitation analysis technical field, more particularly to a kind of test of the shale flow of air of closing
Method and apparatus.
Background technology
Shale gas reservoir belongs to special low hole, special hypotonic multiple dimensioned dual media, while shale gas have adsorption/desorption/expansion
The unconventional gas reservoir of various flow behaviors such as scattered/flowing.Storage is oozed structure and is belonged to and receives micron order of magnitude and with very strong multiple dimensioned
Property, the seepage flow mechanism with special microcosmic memory structure and complexity.Shale permeability is to characterize gas migration one thing of ability
Reason amount, is not only the factor for affecting shale gas well effective exploitation particularly important, or the design of evaluating reservoir, development plan, numerical value
Simulation and the important parameter of evaluating production capacity.
Permeability test at present has steady state method, nonsteady pulse damped method, mercury injection method.
Conventional stationarity Seepage Experiment method, is that rock core outlet pressures apply certain pressure, metering outlet for atmospheric pressure, entrance
Gas flow, carries out the experimental technique of gas flow under different pressures gradient.Under low pore pressure, as confined pressure increases, ooze
Saturating rate step-down, slippage effect is strong when gas low pressure flows, and permeability is bigger than normal.Traditional steady-state permeation rate method of testing efficiency is low, real
Test easy influenced by ambient temperature, the flow velocity metering bigger error of process.
Nonsteady pulse damped method, it is divided into core column pulse attenuation method, landwaste pulse attenuation method, degassing method.Core column
Impulse attenuation permeability method of testing can test reservoir initial condition and different confined pressure under the conditions of reservoir permeability, and reservoir
Stress sensitivity, but confined pressure makes rock core microcrack produce closure, and clossing pressure is different and different with sample, so as to cause infiltration
Rate is easily affected by microcrack.The gas permeability that landwaste pulse attenuation method can be tested under the conditions of different water cut saturation；Sample
Product profile is unrestricted, being capable of the irregular sample such as testing rock core section, well drilling detritus；Can survey matrix permeability, but because cannot
Apply confined pressure, measuring accuracy is relatively low.Degassing permeability method of testing is mainly used in the test of live sealing core drilling, in measurement
The isoparametric simultaneous quantitative of shale reservoir gas-bearing amount provides the size of permeability.The method have ignored the adsorption/desorption of shale gas/
The types of flow such as diffusion, permeability test result deviation is larger.
Pressure hydrargyrum permeability method of testing, using prediction mould of the pressure hydrargyrum capillary pressure curve prediction permeability based on different theories
Type, result of study be shale reservoir unstable state permeability method of testing, mercury injection method prediction permeability mainly by sample rock type,
Fracture development etc. affects, and different sample type Permeability Prediction result differences are larger.
Above experimental technique has problems：1. under confined pressure, conventional stationarity Seepage Experiment method, nonsteady pulse damped method
Desorbing will not occur with pressure hydrargyrum method shale, the impact of adsorption effect is ignored, its permeability is underestimated；2. permeability is rock
The property of itself, therefore its not change with pressure and the change of gas pattern of flow, and the gas slip under low pressure minute yardstick
Effect is clearly；3. seepage characteristic under different aperture pressure cannot be characterized.
The content of the invention
The technical problem to be solved in the present invention is for defect of the prior art, there is provided a kind of shale air-flow of closing
Dynamic method of testing and device.
The technical solution adopted for the present invention to solve the technical problems is：A kind of test dress of the shale flow of air of closing
Put, including high pressure nitrogen air intake installation, high-pressure natural gas air intake installation, the first six-way valve, booster pump, the second six-way valve, evacuation
Device, calorstat, rock core flow model, differential pressure pick-up, buffer, ring pressure controlling pump and two-way displacement pump；
The high pressure nitrogen air intake installation and high-pressure natural gas air intake installation are by pipeline after the first six-way valve and booster pump
It is connected with the second six-way valve, the evacuator is connected with the second six-way valve, the second six-way valve is configured in constant temperature by pipeline
Be connected with two-way displacement pump after rock core flow model in case, the rock core flow model respectively with differential pressure pick-up and for
Track adjusts the ring pressure controlling pump connection of rock core flow model confined pressure.
By such scheme, the buffering for caching displacing gases is provided between the rock core flow model and two-way displacement pump
Device.
A kind of method of testing of the shale flow of air of closing, comprises the following steps：
1）Collection shale gas reservoir reservoir rock simultaneously makes natural core, testing rock core physical parameter, collects gas reservoir static nature ginseng
Number；The testing rock core physical parameter includes porosity, water saturation, the content of organic matter and core quality；The gas reservoir is quiet
State characteristic parameter includes gas reservoir formation temperature, strata pressure and burden pressure；
2）Arranged according to geologic characteristics, filling rock core is in test device；
3）The evacuator in test device is opened, vacuum pressure -0.1MPa is evacuated to, evacuator is closed；
4）Open natural gas high pressure air intake installation and booster pump fills natural gas to certain pressure, it is ensured that model and pipeline ensure quilt
Pure natural gas is filled, and is then pressurized to strata pressure, and confined pressure is gas reservoir burden pressure, and calorstat is warming up to assigned temperature；
5）Test device confined pressure pressure remained steady 24 hours, allows natural gas to spread in shale, adsorbs and sufficiently achieve balance；It is whole
Individual test confined pressure will ensure non-leakage；
6）Conducting experiment flow opens successively two-way displacement pump, differential pressure pick-up；
7）Change two-way displacement pump displacement flow, pressure reduction of the gas in rock core during seepage flow under test different flow, until pressure reduction
Stable, test is no less than 5 points, draws seepage characteristic curve such as Fig. 2.Wherein, seepage characteristic curve is percolation flow velocity and pressure
The relation curve of gradient；
8）Change confined pressure pressure, repeat step 7）, draw seepage characteristic curve such as Fig. 3 under different confined pressures.
9）Change pore pressure, repeat step 7）, draw seepage characteristic curve such as Fig. 4 under different aperture pressure.
By such scheme, the step 1）Middle natural core be cylinder, diameter of section 2.5cm, cylinder length be 3 to
8cm。
The beneficial effect comprise that：
1）Physical characteristics, the geologic feature of shale can be fully characterized, diffusion, the adsorption effect of development process shale gas is reproduced；
2）Gas effective permeability during test simulation gas reservoir development under the conditions of different pressures；
3）Different development phases different aperture Pressure-seepage Flow characteristic can fully be characterized.
The present invention clearly affects shale flow of air, the principal element of exploitation and the multiple dimensioned medium flow field motivation of shale gas to research
It is significant that reason, shale gas reservoir dynamic analysis, capability forecasting etc. provide theory support.Apparatus of the present invention automaticity
High, data monitor, gather, processing automatically, accurately.
Description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing：
Fig. 1 shale gas experimental apparatus forb simulating seepage figures；
Fig. 2 is embodiment of the present invention seepage characteristic curve；
Fig. 3 is embodiment of the present invention difference confined pressure seepage characteristic curve chart；
Fig. 4 is embodiment of the present invention different aperture Pressure-seepage Flow performance diagram.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that specific embodiment described herein is not used to limit only to explain the present invention
The fixed present invention.
As shown in figure 1, a kind of test device of the shale flow of air of closing, including high pressure nitrogen air intake installation 1, high pressure day
Right gas air intake installation 2, the first six-way valve 3, booster pump 4, the second six-way valve 6, evacuator 5, calorstat 7, rock core flow model
8th, differential pressure pick-up 9, buffer 10, ring pressure controlling pump 11 and two-way displacement pump 12；
High pressure nitrogen air intake installation 1 and high-pressure natural gas air intake installation 2 are by pipeline after the first six-way valve 3 and booster pump 4
It is connected with the second six-way valve 6, evacuator 5 is connected with the second six-way valve 6, the second six-way valve 6 is configured in constant temperature by pipeline
It is connected with two-way displacement pump 12 after rock core flow model 8 in case 7, is provided between rock core flow model 8 and two-way displacement pump 12
Buffer 10, rock core flow model 8 is respectively with differential pressure pick-up 9 and voltage-controlled for the ring of tracking regulation rock core flow model confined pressure
Pump processed 11 connects.Buffer is provided with after rock core flow model between two-way displacement pump.
A kind of method of testing of the shale flow of air of closing, comprises the following steps：
1）Collection shale gas reservoir reservoir rock simultaneously makes natural core, testing rock core physical parameter, collects gas reservoir static nature ginseng
Number；The testing rock core physical parameter includes porosity, water saturation, the content of organic matter and core quality；The gas reservoir is quiet
State characteristic parameter includes gas reservoir formation temperature, strata pressure and burden pressure；
2）Arranged according to geologic characteristics, filling rock core is in test device；
3）Evacuator in opening in test device, is evacuated to vacuum pressure -0.1MPa, closes evacuator；
4）Open natural gas high pressure air intake installation and booster pump fills natural gas to certain pressure, it is ensured that model and pipeline ensure quilt
Pure natural gas is filled, and is then pressurized to strata pressure, and confined pressure is gas reservoir burden pressure, and calorstat is warming up to assigned temperature；
5）Test device confined pressure pressure remained steady 24 hours, allows natural gas to spread in shale, adsorbs and sufficiently achieve balance；It is whole
Individual test confined pressure will ensure non-leakage.
6）Conducting experiment flow opens successively two-way displacement pump, differential pressure pick-up.
7）Change flow, pressure reduction of the gas in rock core during seepage flow under test different flow, until pressure reduction is stable, is tested not
Less than 5 points, seepage characteristic curve such as Fig. 2 is drawn.Wherein, seepage characteristic curve is that percolation flow velocity is bent with the relation of barometric gradient
Line；
8）Change confined pressure pressure, repeat step 7）, draw seepage characteristic curve such as Fig. 3 under different confined pressures.
9）Change pore pressure, repeat step 7）, draw seepage characteristic curve such as Fig. 4 under different aperture pressure.
Step 1 in the present embodiment）Middle natural core is cylinder, and diameter of section 2.5cm, cylinder length are 3 to 8cm.
It should be appreciated that for those of ordinary skills, can according to the above description be improved or be converted,
And all these modifications and variations should all belong to the protection domain of claims of the present invention.
Claims (4)
1. the test device of the shale flow of air of a kind of closing, it is characterised in that natural including high pressure nitrogen air intake installation, high pressure
Gas air intake installation, the first six-way valve, booster pump, the second six-way valve, evacuator, calorstat, rock core flow model, differential pressure sensing
Device, buffer, ring pressure controlling pump and two-way displacement pump；
The high pressure nitrogen air intake installation and high-pressure natural gas air intake installation are by pipeline after the first six-way valve and booster pump
It is connected with the second six-way valve, the evacuator is connected with the second six-way valve, the second six-way valve is configured in constant temperature by pipeline
Be connected with two-way displacement pump after rock core flow model in case, the rock core flow model respectively with differential pressure pick-up and for
Track adjusts the ring pressure controlling pump connection of rock core flow model confined pressure.
2. test device according to claim 1, it is characterised in that between the rock core flow model and two-way displacement pump
It is provided with the buffer for caching displacing gases.
3. a kind of usage right requires the method for testing of the shale flow of air of test device described in 1 or 2, it is characterised in that include
Following steps：
1）Collection shale gas reservoir reservoir rock simultaneously makes natural core, testing rock core physical parameter, collects gas reservoir static nature ginseng
Number；The testing rock core physical parameter includes porosity, water saturation, the content of organic matter and core quality；The gas reservoir is quiet
State characteristic parameter includes gas reservoir formation temperature, strata pressure and burden pressure；
2）Arranged according to geologic characteristics, filling rock core is in test device；
3）The evacuator in test device is opened, vacuum pressure -0.1MPa is evacuated to, evacuator is closed；
4）Open natural gas high pressure air intake installation and booster pump fills natural gas to certain pressure, it is ensured that model and pipeline ensure quilt
Pure natural gas is filled, and is then pressurized to strata pressure, and confined pressure is gas reservoir burden pressure, and calorstat is warming up to assigned temperature；
5）Test device confined pressure pressure remained steady 24 hours, allows natural gas to spread in shale, adsorbs and sufficiently achieve balance；It is whole
Individual test confined pressure will ensure non-leakage；
6）Conducting experiment flow opens successively two-way displacement pump, differential pressure pick-up；
7）Change two-way displacement pump discharge, pressure reduction of the gas in rock core during seepage flow under test different flow, until pressure reduction is stable,
Test is no less than 5 points, draws seepage characteristic curve；Wherein, seepage characteristic curve is the relation of percolation flow velocity and barometric gradient
Curve；
8）Change confined pressure pressure, repeat step 7）, draw seepage characteristic curve under different confined pressures；
9）Change pore pressure, repeat step 7）, draw seepage characteristic curve under different aperture pressure.
4. method of testing according to claim 3, it is characterised in that the step 1）Middle natural core is cylinder, is cut
Face diameter 2.5cm, cylinder length are 3 to 8cm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611194324.9A CN106596377A (en) | 2016-12-21 | 2016-12-21 | Sealed shale gas flow testing method and device |
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|---|---|---|---|
| CN201611194324.9A CN106596377A (en) | 2016-12-21 | 2016-12-21 | Sealed shale gas flow testing method and device |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109470616A (en) * | 2018-10-31 | 2019-03-15 | 重庆大学 | Rock multifunction seepage test macro |
| CN110018105A (en) * | 2019-04-29 | 2019-07-16 | 中国石油大学(北京) | Matrix-Fracture System gas simulated flowing apparatus and method |
| CN110296921A (en) * | 2018-03-21 | 2019-10-01 | 中国石油化工股份有限公司 | The test device and test method of steady state method shale gas permeability under reservoir conditions |
| CN110320130A (en) * | 2018-03-30 | 2019-10-11 | 中国石油化工股份有限公司 | Observe the device and method of shale core gas happening law |
| CN110793901A (en) * | 2019-12-13 | 2020-02-14 | 西南石油大学 | High-temperature high-pressure gas reservoir permeability flow rate sensitivity test method considering bound water |
| CN112129482A (en) * | 2020-08-13 | 2020-12-25 | 中国石油天然气股份有限公司 | Shale gas flow capacity analysis method and device in shale reservoir matrix |
| CN112219105A (en) * | 2018-06-05 | 2021-01-12 | 沙特阿拉伯石油公司 | System and method for analyzing natural gas flow in a subterranean reservoir |
| CN112834405A (en) * | 2021-01-07 | 2021-05-25 | 中国科学院西北生态环境资源研究院 | Method and device for testing permeability of rock core overburden pressure matrix |
| CN112881259A (en) * | 2021-01-18 | 2021-06-01 | 山东科技大学 | Visualization device and method for measuring gas-water relative permeability of joint network based on steady state method |
| CN112945827A (en) * | 2021-01-29 | 2021-06-11 | 中国石油天然气股份有限公司 | Rock dynamic physical property measuring system |
| CN113825996A (en) * | 2019-05-17 | 2021-12-21 | 沙特阿拉伯石油公司 | Method and system for determining core permeability in pulse attenuation experiments |
| CN114136856A (en) * | 2021-08-27 | 2022-03-04 | 中国人民解放军63653部队 | Permeability in-situ measuring device for particle accumulation type medium and measuring method thereof |
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