CN108732061A - Stripping gas and free gas recognition methods in a kind of shale gas output gas - Google Patents
Stripping gas and free gas recognition methods in a kind of shale gas output gas Download PDFInfo
- Publication number
- CN108732061A CN108732061A CN201710252082.2A CN201710252082A CN108732061A CN 108732061 A CN108732061 A CN 108732061A CN 201710252082 A CN201710252082 A CN 201710252082A CN 108732061 A CN108732061 A CN 108732061A
- Authority
- CN
- China
- Prior art keywords
- gas
- pressure
- pump
- volume
- sample
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N7/00—Analysing materials by measuring the pressure or volume of a gas or vapour
- G01N7/02—Analysing materials by measuring the pressure or volume of a gas or vapour by absorption, adsorption, or combustion of components and measurement of the change in pressure or volume of the remainder
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention belongs to natural gas extraction field, it is related to stripping gas and free gas recognition methods in a kind of shale gas output gas, including：1) volume V is carried out to sample before experimentSample, quality m metering, to VUnderIt is demarcated, sets the temperature T of insulating box as experimental temperature；2) valve I is closed, valve III is opened；3) until after system pressure stabilization, pass through pressure sensor and record initial pressure P, close valve III；4) it sets high precision piston pump to constant voltage mode, and sets pump pressure to first experiment pressure value, start to move back pump at this time, the accumulative aerogenesis volume of high precision piston pump is reset；5) valve III is opened, continues to move back pump；6) when pressure value reaches the first experiment pressure value of high precision piston pump setting and balances, pressure P ' is recorded, valve III is closed, is repeated 4)~5) step.This method can identify the content of stripping gas and free gas in output gas, while ensure that the reliability of test result.
Description
Technical field
The present invention relates to natural gas extraction technical field, more particularly, to stripping gas in a kind of shale gas output gas and
Free gas recognition methods.
Background technology
China's shale gas exploration and development at present is in the starting stage, in-house laboratory investigation mostly with petrology analysis, change point
Based on analysis, gas-bearing property analysis etc., exploitation PHYSICAL MODELING OF IN concentrates on Determination of Physical Property Parameters, pore structure characteristic, adsorption experiment
And seepage flow characteristics etc., it is less to the dynamic physicals analog study such as identification of free gas in gas generation process and stripping gas, and
The aerogenesis feature of different development phases is particularly significant for shale gas production forecast.
Patent document CN201420640699.3 discloses a kind of shale property analyzer, can measure the free of shale samples
Gas content and adsorbed gas content.Patent document CN201410826709.7 is by log data from two phases of ADSORPTION STATE and free state
State obtains shale reservoir air content.Patent document CN201410335444.0 is predicted using synchrotron radiation light and computer technology
Free gas and adsorbed gas content in shale gas.Patent document CN201610060001.4 synthesis cover pressure hole ooze, absorption-sound wave translocation
Etc. means establish a kind of computational methods of shale adsorbed gas and free gas.In conclusion interior is respectively adopted in fact in existing literature
It tests, well logging means or numerical method calculate separately free tolerance and absorption tolerance, the problem of studying shale air content.However gassiness
Gas production is measured and is not equal to, actually due to desorption curve and adsorption curve and misaligned, the gas desorption quantity in recovery process is not
Equal to absorption tolerance.
Invention content
The purpose of the present invention is being directed to the problem of existing shale gas adsorption-desorption device can not carry out gas happening law, provide
Stripping gas and free gas recognition methods in a kind of shale gas output gas pass through the experiment number of foundation when carrying out exploitation simulated experiment
According to processing method, the content of stripping gas and free gas in output gas can be identified, obtain stripping gas and trip under different recovery pressures
Change of production feature from gas, to provide support for mining type optimization, capability forecasting and dynamic analysis.
To achieve the goals above, stripping gas and free gas recognition methods in a kind of shale gas output gas of present invention offer,
This method includes：
A, after adsorption experiment, carry out level pressure exploitation simulated experiment：
1) volume V is carried out to sample before experimentSample, free space volumes VFrom, quality m metering, to sample cylinder volume and cylinder body
To the sum of volume of line volume V between valve I, valve III, sensorUnderIt is demarcated, sets the temperature T of insulating box as in fact
Test temperature；
2) valve I is closed, valve III is opened；
3) until after the system pressure stabilization that sample cylinder, piston type intermediate receptacle and pipeline are formed, pass through pressure sensor
Initial pressure P is recorded, valve III is closed；
4) it sets high precision piston pump to constant voltage mode, and sets pump pressure to first experiment pressure value, open at this time
Beginning moves back pump, and after system pressure is stablized, the accumulative aerogenesis volume of high precision piston pump is reset；
5) valve III is opened, continues to move back pump, data collecting system acquires the pump pressure of high precision piston pump, moves back the pump housing in real time
Product VPump, aerogenesis flow velocity and accumulative aerogenesis volume；
6) when the pressure value that pressure sensor is shown reaches the first experiment pressure value of high precision piston pump setting and puts down
When weighing apparatus, pressure P ' is recorded, closes valve III, carries out second pressure spot blance test, is repeated 4)~5) step, it carries out more
A pressure spot blance test, until the last one pressure spot blance test terminates；
B, data processing：
VTrip=V-VSolution；
In formula,
Gas production under V- standard state, cm3/ g,
VSolutionMark gas desorption quantity under condition, cm3/ g,
VTripMark the free tolerance of output under condition, cm3/ g,
P- initial pressures, MPa,
P'- balance pressure, MPa,
Gas compressibility factor under Z- initial pressures,
Z'- balances gas compressibility factor under pressure,
VPumpMove back pump volume, cm3,
VUnderSample cylinder spatial volume, cm3,
VSampleSample apparent volume, cm3,
VFromFree space volumes, cm3,
T- experimental temperatures, K,
M- sample qualities, g.
According to method provided by the invention, it is preferable that in the step 6) of level pressure exploitation simulated experiment, repeat 4)~5) step
Suddenly, multiple pressure spot blance tests are carried out one by one from height is low.
According to method provided by the invention, it is preferable that the high precision piston pump has constant voltage mode and constant current mode.
According to method provided by the invention, VFromFor free space volumes, definition and assay method are referring to QSH0511-
2013, GBT19560-2008.The value is measured before carrying out adsorption experiment.
In the present invention, the method is that device is realized through the following experiment：With reference to cylinder, sample cylinder, insulating box, back pressure
Control/yield metering system, data collecting system, valve I, valve II, valve III, pressure sensor and pressure sensor；
Back pressure control/yield the metering system includes sequentially connected piston type intermediate receptacle, valve IV and high-precision
Plunger pump；
It is sequentially connected with reference to cylinder, sample cylinder, piston type intermediate receptacle and high precision piston pump, with reference to cylinder, sample cylinder and height
Precision plunger pump is connected with data collecting system respectively；Valve I is located at reference between cylinder and sample cylinder, and valve III is located at sample
Between cylinder and piston type intermediate receptacle；Pressure sensor is located at reference between cylinder and data collecting system, and pressure sensor is located at
Between sample cylinder and data collecting system.
The valve II is connected with reference to cylinder.
According to method provided by the invention, the experimental provision used in the operating procedure can carry out sorption and desorption isotherm reality
Test, experimental procedure and its data handling procedure referring to《Q/SH 0511-2013 shale isothermal adsorption-desorption curve measurement side
Method》.
The advantageous effect that technical solution of the present invention is brought is：The extracting experiment of this method can simulate decompression recovery process
The output process of middle stripping gas and free gas, establishes a kind of Processing for Data Analysis in Physics, can identify stripping gas in output gas
And the content of free gas, plunger pump is combined with piston type intermediate receptacle realizes accurate pressure control and high temperature and pressure item
The accurate measurement of gas production under part, ensure that the reliability of test result.
Description of the drawings
Exemplary embodiment of the invention is described in more detail in conjunction with the accompanying drawings, it is of the invention above-mentioned and its
Its purpose, feature and advantage will be apparent, wherein in exemplary embodiment of the invention, identical reference label
Typically represent same parts.
Fig. 1 shows stripping gas and free gas identification experimental provision schematic diagram in shale gas output gas.
Fig. 2 shows the passes of the cumulative gas production and pressure of stripping gas and free gas in shale gas output gas in embodiment 1
System.
Above-mentioned figure label is described as follows：
1- valves I；2- pressure sensors；3- valves II；4- refers to cylinder；5- sample cylinders；6- piston type intermediate receptacles；7- is pressed
Force snesor；8- valves III；9- valves IV；10- high precision piston pumps；11- insulating boxs；12- data collecting systems.
Specific implementation mode
The preferred embodiment of the present invention is more fully described below with reference to accompanying drawings.Although showing the present invention in attached drawing
Preferred embodiment, however, it is to be appreciated that may be realized in various forms the present invention without the embodiment party that should be illustrated here
Formula is limited.
Embodiment 1
Experimental provision is identified using stripping gas in the shale gas output gas shown in Fig. 1 and free gas, carries out a kind of shale gas
Stripping gas and free gas recognition methods, this method include in output gas：
A, after adsorption experiment, carry out level pressure exploitation simulated experiment：
1) volume V is carried out to sample before experimentSample, free space volumes VFrom, quality m metering, to 5 volume of sample cylinder and cylinder body
To the sum of volume of line volume V between valve I 1, valve III 8, sensor 7UnderIt is demarcated, sets the temperature of insulating box 11
Degree T is experimental temperature；
| VSample, cm3 | VFrom, cm3 | VUnder, cm3 | Quality, g | T, DEG C |
| 759.11 | 104.91 | 831.18 | 1960.8 | 82 |
2) valve 1I is closed, valve III 8 is opened；
3) until after the system pressure stabilization that sample cylinder 5, piston type intermediate receptacle 6 and pipeline are formed, pass through pressure sensing
Device 7 records initial pressure P, closes valve III 8；
4) it sets high precision piston pump 10 to constant voltage mode, and sets pump pressure to first experiment pressure value, at this time
Start to move back pump, after system pressure is stablized, the accumulative aerogenesis volume of high precision piston pump 10 is reset；
5) open valve III 8, continue to move back pump, data collecting system 12 acquire in real time high precision piston pump 10 pump pressure,
Move back pump volume VPump, aerogenesis flow velocity and accumulative aerogenesis volume；
6) when pressure sensor 7 show pressure value reach high precision piston pump 10 setting first experiment pressure value and
When balance, pressure P ' is recorded, closes valve III 8, carries out second pressure spot blance test, is repeated 4)~5) step, into
The multiple pressure spot blance tests of row, until the last one pressure spot blance test terminates；
B, data processing：
VTrip=V-VSolution；
In formula,
Gas production under V- standard state, cm3/ g,
VSolutionMark gas desorption quantity under condition, cm3/ g,
VTripMark the free tolerance of output under condition, cm3/ g,
P- initial pressures, MPa,
P'- balance pressure, MPa,
Gas compressibility factor under Z- initial pressures,
Z'- balances gas compressibility factor under pressure,
VPumpMove back pump volume, cm3,
VUnderSample cylinder spatial volume, cm3,
VSampleSample apparent volume, cm3,
VFromFree space volumes, cm3,
T- experimental temperatures, K,
M- sample qualities, g.
Experimental result is illustrated in fig. 2 shown below, and can be seen that from graphical results, and processing method through the invention can identify production
The content of stripping gas and free gas in outlet, to provide support for mining type optimization, capability forecasting and dynamic analysis.
Various embodiments of the present invention are described above, above description is exemplary, and non-exclusive, and
It is not limited to disclosed each embodiment.Without departing from the scope and spirit of illustrated each embodiment, for this skill
Many modifications and changes will be apparent from for the those of ordinary skill in art field.
Claims (3)
1. stripping gas and free gas recognition methods in a kind of shale gas output gas, which is characterized in that this method includes：
A, after adsorption experiment, carry out level pressure exploitation simulated experiment：
1) volume V is carried out to sample before experimentSample, free space volumes VFrom, quality m metering, sample cylinder (5) volume and cylinder body are arrived
The sum of volume of line volume V between valve I (1), valve III (8), sensor (7)UnderIt is demarcated, setting insulating box (11)
Temperature T be experimental temperature；
2) valve I (1) is closed, valve III (8) is opened；
3) until after the system pressure stabilization that sample cylinder (5), piston type intermediate receptacle (6) and pipeline are formed, pass through pressure sensing
Device (7) records initial pressure P, closes valve III (8)；
4) it sets high precision piston pump (10) to constant voltage mode, and sets pump pressure to first experiment pressure value, open at this time
Beginning moves back pump, and after system pressure is stablized, the accumulative aerogenesis volume of high precision piston pump (10) is reset；
5) open valve III (8), continue to move back pump, data collecting system (12) acquire in real time high precision piston pump (10) pump pressure,
Move back pump volume VPump, aerogenesis flow velocity and accumulative aerogenesis volume；
6) when pressure sensor (7) show pressure value reach high precision piston pump (10) setting first experiment pressure value and
When balance, pressure P ' is recorded, closes valve III (8), carries out second pressure spot blance test, is repeated 4)~5) step, into
The multiple pressure spot blance tests of row, until the last one pressure spot blance test terminates；
B, data processing：
VTrip=V-VSolution；
In formula,
Gas production under V- standard state, cm3/ g,
VSolutionMark gas desorption quantity under condition, cm3/ g,
VTripMark the free tolerance of output under condition, cm3/ g,
P- initial pressures, MPa,
P'- balance pressure, MPa,
Gas compressibility factor under Z- initial pressures,
Z'- balances gas compressibility factor under pressure,
VPumpMove back pump volume, cm3,
VUnderSample cylinder spatial volume, cm3,
VSampleSample apparent volume, cm3,
VFromFree space volumes, cm3,
T- experimental temperatures, K,
M- sample qualities, g.
2. according to the method described in claim 1, wherein, in the step 6) of level pressure exploitation simulated experiment, repeat 4)~5) step,
Multiple pressure spot blance tests are carried out one by one from height is low.
3. according to the method described in claim 1, wherein, the high precision piston pump (10) has constant voltage mode and constant current mould
Formula.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710252082.2A CN108732061B (en) | 2017-04-17 | 2017-04-17 | Method for identifying desorbed gas and free gas in shale gas output gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710252082.2A CN108732061B (en) | 2017-04-17 | 2017-04-17 | Method for identifying desorbed gas and free gas in shale gas output gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108732061A true CN108732061A (en) | 2018-11-02 |
| CN108732061B CN108732061B (en) | 2020-05-22 |
Family
ID=63923939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710252082.2A Active CN108732061B (en) | 2017-04-17 | 2017-04-17 | Method for identifying desorbed gas and free gas in shale gas output gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108732061B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110146425A (en) * | 2019-05-16 | 2019-08-20 | 中国地质大学（武汉） | A kind of quantitative assessment experimental provision of shale High Pressure Absorption gas componant |
| CN110608975A (en) * | 2019-09-23 | 2019-12-24 | 中国地质大学（武汉） | Gas content testing device and testing method and application thereof |
| CN111175176A (en) * | 2020-01-06 | 2020-05-19 | 重庆科技学院 | Automatic calibration system for volume of shale isothermal adsorption experiment cylinder |
| CN112924354A (en) * | 2021-01-22 | 2021-06-08 | 西南石油大学 | Shale reservoir stress sensitivity experiment evaluation method based on gas diffusion coefficient |
| CN114047105A (en) * | 2021-11-15 | 2022-02-15 | 东北石油大学 | Device and method for testing porosity of high-pressure helium shale |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201965070U (en) * | 2011-02-23 | 2011-09-07 | 黑龙江科技学院 | Gas desorption experiment device under external liquid invasion condition |
| KR20120098155A (en) * | 2011-02-28 | 2012-09-05 | 주식회사 과학기술분석센타 | Water pollution measurement system by using gas sensor |
| CN102944666A (en) * | 2012-12-05 | 2013-02-27 | 西南石油大学 | Shale gas reservoir recovery simulation experimental device |
| CN104390883A (en) * | 2014-11-10 | 2015-03-04 | 西南石油大学 | Novel adsorption and desorption experiment device and novel adsorption and desorption experiment method |
-
2017
- 2017-04-17 CN CN201710252082.2A patent/CN108732061B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201965070U (en) * | 2011-02-23 | 2011-09-07 | 黑龙江科技学院 | Gas desorption experiment device under external liquid invasion condition |
| KR20120098155A (en) * | 2011-02-28 | 2012-09-05 | 주식회사 과학기술분석센타 | Water pollution measurement system by using gas sensor |
| CN102944666A (en) * | 2012-12-05 | 2013-02-27 | 西南石油大学 | Shale gas reservoir recovery simulation experimental device |
| CN104390883A (en) * | 2014-11-10 | 2015-03-04 | 西南石油大学 | Novel adsorption and desorption experiment device and novel adsorption and desorption experiment method |
Non-Patent Citations (2)
| Title |
|---|
| 解晨等: "标定体积对超临界温度气体吸附等温线的影响", 《武汉理工大学学报》 * |
| 陈铭等: "页岩气藏游离气量和解吸气量计算方法研究", 《科学技术与工程》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110146425A (en) * | 2019-05-16 | 2019-08-20 | 中国地质大学（武汉） | A kind of quantitative assessment experimental provision of shale High Pressure Absorption gas componant |
| CN110608975A (en) * | 2019-09-23 | 2019-12-24 | 中国地质大学（武汉） | Gas content testing device and testing method and application thereof |
| CN111175176A (en) * | 2020-01-06 | 2020-05-19 | 重庆科技学院 | Automatic calibration system for volume of shale isothermal adsorption experiment cylinder |
| CN111175176B (en) * | 2020-01-06 | 2022-04-26 | 重庆科技学院 | Automatic calibration system for volume of shale isothermal adsorption experiment cylinder |
| CN112924354A (en) * | 2021-01-22 | 2021-06-08 | 西南石油大学 | Shale reservoir stress sensitivity experiment evaluation method based on gas diffusion coefficient |
| CN112924354B (en) * | 2021-01-22 | 2022-09-20 | 西南石油大学 | Shale reservoir stress sensitivity experiment evaluation method based on gas diffusion coefficient |
| CN114047105A (en) * | 2021-11-15 | 2022-02-15 | 东北石油大学 | Device and method for testing porosity of high-pressure helium shale |
| CN114047105B (en) * | 2021-11-15 | 2022-11-15 | 东北石油大学 | Device and method for testing porosity of high-pressure helium shale |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108732061B (en) | 2020-05-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108732061A (en) | Stripping gas and free gas recognition methods in a kind of shale gas output gas | |
| CN107345890B (en) | Shale gas adsorption desorption/exploitation simulation experiment device and method | |
| CN104897525B (en) | The test system and method for diffusion coefficient and isothermal adsorption/desorption curve | |
| CN103033442B (en) | A kind of gas adsorption test device for desorption | |
| CN104390883A (en) | Novel adsorption and desorption experiment device and novel adsorption and desorption experiment method | |
| CN206410978U (en) | A kind of tight rock gas phase relative permeability measurement apparatus | |
| CN107192632A (en) | A kind of device and method for measuring shale gas reservoir air content | |
| CN103226089B (en) | Method for testing shale gas permeability | |
| CN110672813B (en) | Shale gas content calculation method | |
| CN106383221B (en) | A kind of reservoir stress sensitive experiment test method and device | |
| CN105588782A (en) | High-low-temperature high-pressure adsorption and desorption testing device and method | |
| CN104535455B (en) | Dynamic monitoring pore pressure is distributed and the gas porous flow experimental provision and method of change | |
| CN105547907A (en) | Servo measuring testing system and method for coal sample gas adsorption and desorption | |
| CN105675434A (en) | System and method for measuring gas content | |
| RU2697421C1 (en) | Integrated gas-proof measuring device for gas content measurement | |
| CN204330547U (en) | A kind of Permeability Oe Coal And Porous Rock And Fractured Rock location parameter pick-up unit | |
| CN104897712A (en) | Shale oil content determination method and system | |
| CN104655522A (en) | On-site shale gas desorption analyzer | |
| CN103063544A (en) | Device and method for evaluating adsorption and desorption properties of modularized coal rock | |
| CN108119132A (en) | DAMAGE OF TIGHT SAND GAS RESERVOIRS nearly well band Radial Flow Through Porous Media water saturation simulator and method | |
| CN104267199B (en) | Shale gas content assaying method and Analytical system | |
| CN106092820B (en) | A kind of mud shale gas absorption tolerance bearing calibration and device based on density | |
| CN103207130B (en) | Method for testing deformation feature parameters of coal test sample in thermal expansion process | |
| CN113624654B (en) | Rock porosity measuring device and method | |
| CN210948653U (en) | Device for rapidly evaluating shale gas well productivity |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |