CN108627414A - The analogy method and simulator of the air content of coal petrography or shale - Google Patents
The analogy method and simulator of the air content of coal petrography or shale Download PDFInfo
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- CN108627414A CN108627414A CN201810122381.9A CN201810122381A CN108627414A CN 108627414 A CN108627414 A CN 108627414A CN 201810122381 A CN201810122381 A CN 201810122381A CN 108627414 A CN108627414 A CN 108627414A
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- G—PHYSICS
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- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The embodiment of the present application discloses the analogy method and simulator of the air content of a kind of coal petrography or shale, and analogy method includes：Natural gas and water are injected into the pressure vessel for the sample for being provided with coal petrography or shale, and the pressure value in the pressure vessel is made to reach predetermined value；The pressure in the pressure vessel is set to be gradually reduced within the first predetermined time to atmospheric pressure pressure value；The pressure in pressure vessel is set to maintain atmospheric pressure pressure value within second scheduled time；Measurement obtains loss tolerance, and the loss tolerance is the volume of the gas in the first predetermined time and the discharge of the second predetermined time inner pressure vessel；So that sample is rested in pressure vessel to be desorbed, gas desorption quantity and residual volume are obtained to measure；Obtain the measurement air content of coal petrography or shale.
Description
Technical field
The present invention relates to coal petrography, shale experimental technique field, in particular to the air content of a kind of coal petrography or shale
Analogy method.The analogy method of the air content of a kind of coal petrography of analogy method or shale.
Background technology
In the prior art, in the method for determining the air content of coal petrography or shale, be using the standard methods such as national standard into
Row measures, or the fixed mathematical model of movement is determined, such as patent CN105092813A.But in the prior art to gassiness
The measurement method of amount does not measure the loss amount of natural gas accurately, therefore there are larger mistakes for the assay method of air content
Difference.By obtaining loss tolerance, the yield that can be produced to coal petrography or shale is more accurately estimated.
Invention content
A kind of simulation side of the air content of the coal petrography that content measurement error is smaller or shale is provided in the embodiment of the present invention
Method.
To achieve the above object, the present invention provides a kind of analogy methods of the air content of coal petrography or shale, including：
Step S10：Natural gas and water are injected into the pressure vessel for the sample for being provided with coal petrography or shale, and pressure is made to hold
Pressure value in device reaches predetermined value；
Step S20：The pressure in the pressure vessel is controlled by the way that the back-pressure valve on the pressure vessel is arranged, is made
Pressure in the pressure vessel is gradually reduced within the first predetermined time to atmospheric pressure pressure value；Make pressure within second scheduled time
Pressure in force container maintains atmospheric pressure pressure value；Measurement obtains loss tolerance, and the loss tolerance is in the first predetermined time
And second predetermined time inner pressure vessel discharge gas volume；
Step S30：So that sample is rested in pressure vessel to be desorbed, gas desorption quantity and remnants are obtained to measure
Tolerance；
Step S40：Coal petrography or page is calculated according to the loss tolerance, the gas desorption quantity and the residual volume
The measurement air content of rock.
Preferably, the predetermined value in the step S10 is for simulating the pressure value for carrying core position in underground.
Preferably, the first predetermined time in the step S20 is gradually earthward being promoted for simulating core from underground
Time.
Preferably, the second predetermined time in the step S20 is used to simulate the time of core tinning process.
Preferably, the atmospheric pressure pressure value in the step S20 is used to simulate the atmospheric pressure value on ground.
Preferably, make in the step S20 pressure in the pressure vessel gradually reduced within the first predetermined time to
Atmospheric pressure pressure value, including：Pressure ramp speed in the pressure vessel reduces.
Preferably, the pressure reduction speed in the pressure vessel is equal to pressure difference value divided by first predetermined time,
Wherein, the pressure difference value is equal to the difference of the predetermined value and atmospheric pressure pressure value.
Preferably, further include step 50, passing through the 2008 coal bed gas content measurement sides GB/T19559-after step 40
Method measures theoretical air content to core；
Step 60, loss amount is obtained according to theoretical air content and measurement air content.
This application discloses a kind of measuring devices, using the device of such as above-mentioned measurement method.
This application discloses a kind of measuring device, including memory and processor, computer program is stored in memory, institute
Computer program is stated when being executed by the processor, realizes following steps：Such as above-mentioned measurement method.
The analogy method of the air content of this coal petrography or shale can simulate actual exploration process, simulate coal petrography or shale
Core is carried to tinning up to last desorption is completed from underground, and entire simulation process is by loss amount in actual conditions in analogy method
It is measured, is more bonded actual conditions, the air content measured is more accurate.And can by with national standard coal bed gas
Content assaying method is compared, and obtains relational graph or formula relationship.It, can be to coal petrography or shale energy by obtaining the margin of error
The yield produced is more accurately estimated.
Description of the drawings
Fig. 1 is the flow diagram of the analogy method of the coal petrography of the embodiment of the present invention or the air content of shale；
Fig. 2 is schematic diagram of the simulation extraction core from underground to tinning.
Fig. 3 is the relational graph lost between the accounting coefficient Y and predetermined extraction time T of tolerance.
Fig. 4 is the structural schematic diagram of the application measuring device.
Specific implementation mode
Present invention is further described in detail in the following with reference to the drawings and specific embodiments, but not as the limit to the present invention
It is fixed.
Shown in referring to Fig. 1 and Fig. 2, according to an embodiment of the invention, a kind of mould of the air content of coal petrography or shale is provided
Quasi- method, includes the following steps：
Step S10：Natural gas and water are injected into the pressure vessel for the sample for being provided with coal petrography or shale, and make institute
The pressure value stated in pressure vessel reaches predetermined value；
Step S20：The pressure in the pressure vessel is controlled by the way that the back-pressure valve on the pressure vessel is arranged, is made
Pressure in the pressure vessel is gradually reduced within the first predetermined time to atmospheric pressure pressure value；；By being arranged in the pressure
Back-pressure valve on container controls the pressure in the pressure vessel, makes the pressure in the pressure vessel in the second pre- timing
It is interior to maintain atmospheric pressure pressure value；Measurement obtains loss tolerance, and the loss tolerance is pre- in the first predetermined time and second
The volume of the gas of inner pressure vessel of fixing time discharge；
Step S30：So that back-pressure valve is in open state, and sample is maintained to rest in pressure vessel to be solved
It inhales, gas desorption quantity and residual volume is obtained to measure；
Step S40：The measurement gassiness of coal petrography or shale is calculated according to loss tolerance, gas desorption quantity and residual volume
Amount.
Preferably, gas reservoir environment is built in order to realize, step S10 includes the following steps：
Step S11：The sample of coal petrography or shale is put into pressure vessel；By pressure vessel to sample press with
Coal petrography or shale are simulated the underground the case where, mainly water and pressure.
Step S12：Natural gas and water are injected into pressure vessel, and the pressure value in pressure vessel is made to reach predetermined value.
Predetermined value is the pressure value for carrying core position in underground, such as 500 meters of underground, then value 5MPa.By compression pump by natural gas and
Water continues to enter the water and natural gas of scheduled pressure value to vessel internal pressure, and the time is longer, can be steady with the pressure value of pressure vessel
It is set to standard.
In the present embodiment, the water injection pipe that the gas injection pipeline that can inject gas is provided on pressure vessel and water can be injected
Road can be provided with pressure sensor and temperature sensor in pressure vessel.It is additionally provided on pressure vessel for gas to be discharged
With the air water flowmeter of water.
Further, step S20 includes the following steps：
Step S21：By controlling the pressure in pressure vessel described in the natural gas being discharged in the pressure vessel and water management
Power gradually reduces within the first predetermined time to atmospheric pressure pressure value.Pass through the back-pressure valve control discharge pressure being connected to pressure vessel
Natural gas and water in force container are discharged as requested, to gradually reduce the pressure in pressure vessel, and then simulate core and exist
The process that core is gradually earthward promoted is put forward from underground, since the pressure that core is gradually subject to the process of promotion in underground gradually subtracts
Small, so carrying out the simulation steps of above-mentioned steps S21.Pressure reduction can be carried out according to actual analog case, such as every time
0.5MPa is reduced, the frequency of pressure reduction can be set as the time between reducing twice and be maintained in 10 minutes to 1 hours.
Step S22：Within second scheduled time, the pressure in the pressure vessel is made to maintain atmospheric pressure pressure value；Step
S22 simulations are the processes for being extracted to the laggard luggage tank in ground, and the pressure value that core is subject in ground location is exactly air
Press pressure value.
The sum of the first predetermined time t1 and the second predetermined time t2 are equal to predetermined extraction time T, that is, T=t1+ as a result,
t2。
Referring to Fig. 2, wherein the first predetermined time t1 is scene extraction of the core from underground position to ground location in exploration
Time, but live extraction time does not include that core carries out the time of tinning on ground.Second predetermined time t2 is tinning process
Time, such as 3min can also being in atmospheric value more in pressure according to the practical tinning time and stop some times, ordinary circumstance
Lower second predetermined time t2 is constant.
Pressure reduction process in pressure vessel, which is pressure ramp speed, reduces process.Pressure reduction speed in pressure vessel etc.
Subtract atmospheric pressure pressure value equal to predetermined value in pressure difference value divided by live extraction time, pressure difference value.Namely：Pressure reduction speed
=pressure difference value/scene extraction time, pressure difference value=pre- level pressure value-atmospheric pressure pressure value.It is general that core process is put forward under actual conditions
All it is at the uniform velocity to carry core, can more accurately simulates the loss amount for putting forward core process in this way.
Step S30：So that back-pressure valve is in open state, and sample is maintained to rest in pressure vessel to be solved
It inhales, gas desorption quantity and residual volume is obtained to measure.Sample includes mainly loss gas, natural stripping gas and residual gas three parts
Composition.In the prior art, generally using 2008 coal bed gas content assay methods of GB/T19559-come to gas desorption quantity Q2 and residual
Residual volume Q3 is measured, and releases loss tolerance Q1 by numerical value.But there is deviations for this method.Therefore the application
It is accurately obtained loss tolerance Q1 in each stage that each core sample of physical simulation produces, to more accurately be damaged
Lose the accounting coefficient Y of tolerance.
Step S40：The measurement of coal petrography or shale is calculated according to the first natural gas volume and the second natural gas volume
Air content；Air content=(loss tolerance Q1+ gas desorption quantity Q2+ residual volume Q3)/sample quality is measured, unit is m3/ t and its
Reduced unit.Certain error can generally be calculated, it is to carry core from underground to entire sample solution sucks to the end to measure air content
Gassiness numerical quantity after complete, is more bonded actual conditions.
Step S50：Theoretical air content is measured to core by 2008 coal bed gas content assay methods of GB/T19559-.State
The measurement theory air content on the present basis of 2008 coal bed gas content assay methods of GB/T19559-is marked, is generally surveyed with this
It is basic as a comparison to determine method.
Relational graph can be obtained between the accounting coefficient Y of the loss tolerance obtained in above-mentioned formula and predetermined extraction time T,
Corresponding calculation formula can also be obtained, relational graph may refer to Fig. 3.It, can be right by obtaining the accounting coefficient of loss tolerance
The yield that coal petrography or shale can produce more accurately is estimated.
Step S60：The relationship of measurement of comparison air content and theoretical air content.Pass through measurement of comparison air content and theoretical gassiness
The relationship of amount can obtain the loss amount (loss amount=theory air content-measurement air content of the extraction natural gas in practical exploration
+ loss tolerance Q1), the error of the coal bed gas contents of national standard GB/T19559-2008 assay method and actual conditions can also be obtained
Size.
The analogy method of the air content of this coal petrography or shale can simulate actual exploration process, simulate coal petrography or shale
Core is carried to tinning up to last desorption is completed from underground, and entire simulation process is by loss amount in actual conditions in analogy method
It is measured, is more bonded actual conditions, the air content measured is more accurate.And can by with national standard coal bed gas
Content assaying method is compared, and obtains relational graph or formula relationship.
With reference to shown in Fig. 4, this application discloses a kind of measuring device, including memory and processor, stored in memory
Computer program, the computer program realize following steps when being executed by the processor：Such as above-mentioned measurement method.
In the present embodiment, the memory may include the physical unit for storing information, typically by information
It is stored again with the media using the methods of electricity, magnetic or optics after digitlization.Memory described in present embodiment again may be used
To include：The device of information, such as RAM, ROM are stored in the way of electric energy；The device of information is stored in the way of magnetic energy, it is such as hard
Disk, floppy disk, tape, core memory, magnetic bubble memory, USB flash disk；The device that information is stored using optical mode, such as CD or DVD.
Certainly, also memory of other modes, such as quantum memory, graphene memory etc..
In the present embodiment, the processor can be implemented in any suitable manner.For example, the processor can be with
Take such as microprocessor or processor and storage can by computer readable program code that (micro-) processor executes (such as
Software or firmware) computer-readable medium, logic gate, switch, application-specific integrated circuit (Application Specific
Integrated Circuit, ASIC), the form etc. of programmable logic controller (PLC) and embedded microcontroller.
The concrete function that the server that this specification embodiment provides, processor and memory are realized, can be with this
Aforementioned embodiments in specification contrast explanation.
It should be noted that term used herein above is merely to describe specific implementation mode, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, work, device, component and/or combination thereof.
It should be noted that term " first " in the description and claims of this application and above-mentioned attached drawing, "
Two " etc. be for distinguishing similar object, without being used to describe specific sequence or precedence.It should be appreciated that using in this way
Data can be interchanged in the appropriate case, so that presently filed embodiment described herein can be in addition to illustrating herein
Or the sequence other than those of description is implemented.
Certainly, it is above the preferred embodiment of the present invention.It should be pointed out that for those skilled in the art
For, under the premise of not departing from general principles, several improvements and modifications can also be made, these improvements and modifications
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of analogy method of the air content of coal petrography or shale, which is characterized in that including：
Step S10：Natural gas and water are injected into the pressure vessel for the sample for being provided with coal petrography or shale, and are made in pressure vessel
Pressure value reach predetermined value；
Step S20：The pressure in the pressure vessel is controlled by the way that the back-pressure valve on the pressure vessel is arranged, is made described
Pressure in pressure vessel is gradually reduced within the first predetermined time to atmospheric pressure pressure value；Pressure is set to hold within second scheduled time
Pressure in device maintains atmospheric pressure pressure value；Measurement obtains loss tolerance, the loss tolerance in the first predetermined time and
The volume of the gas of second predetermined time inner pressure vessel discharge；
Step S30：So that sample is rested in pressure vessel to be desorbed, gas desorption quantity and residual gas are obtained to measure
Amount；
Step S40：Coal petrography or shale is calculated according to the loss tolerance, the gas desorption quantity and the residual volume
Measure air content.
2. analogy method according to claim 1, which is characterized in that the predetermined value in the step S10 is carried for simulating
Pressure value of the core position in underground.
3. analogy method according to claim 1, which is characterized in that the first predetermined time in the step S20 is used for
Core is simulated in the time gradually earthward promoted from underground.
4. analogy method according to claim 1, which is characterized in that the second predetermined time in the step S20 is used for
Simulate the time of core tinning process.
5. analogy method according to claim 1, which is characterized in that the atmospheric pressure pressure value in the step S20 is used for mould
The atmospheric pressure value on quasi- ground.
6. analogy method according to claim 1, which is characterized in that make in the pressure vessel in the step S20
Pressure is gradually reduced within the first predetermined time to atmospheric pressure pressure value, including：Pressure ramp speed in the pressure vessel reduces.
7. analogy method according to claim 6, which is characterized in that the pressure reduction speed in the pressure vessel is equal to
Pressure difference value divided by first predetermined time, wherein the pressure difference value is equal to the difference of the predetermined value and atmospheric pressure pressure value
Value.
8. analogy method according to claim 1, which is characterized in that further include step 50, passing through after step 40
2008 coal bed gas content assay methods of GB/T19559-measure theoretical air content to core；
Step 60, loss amount is obtained according to theoretical air content and measurement air content.
9. a kind of simulator, which is characterized in that using the device such as claim 1 to 8 any one of them analogy method.
10. a kind of simulator, which is characterized in that including memory and processor, computer program is stored in memory, it is described
Computer program realizes following steps when being executed by the processor：Such as claim 1 to 8 any one of them simulation side
Method.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810122381.9A CN108627414A (en) | 2018-02-07 | 2018-02-07 | The analogy method and simulator of the air content of coal petrography or shale |
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|---|---|---|---|
| CN201810122381.9A CN108627414A (en) | 2018-02-07 | 2018-02-07 | The analogy method and simulator of the air content of coal petrography or shale |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104863579A (en) * | 2015-05-27 | 2015-08-26 | 中国地质大学（北京） | Loss gas content determining method and system |
| CN106442938A (en) * | 2016-10-17 | 2017-02-22 | 铜仁中能天然气有限公司 | Device used in surveying calculation method for accurately acquiring shale gas content |
| CN106970001A (en) * | 2017-04-28 | 2017-07-21 | 中国石油天然气股份有限公司 | The simulating test device and method of loss tolerance in the test of shale air content |
| CN107192632A (en) * | 2017-04-29 | 2017-09-22 | 贵州大学 | A kind of device and method for measuring shale gas reservoir air content |
-
2018
- 2018-02-07 CN CN201810122381.9A patent/CN108627414A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104863579A (en) * | 2015-05-27 | 2015-08-26 | 中国地质大学（北京） | Loss gas content determining method and system |
| CN106442938A (en) * | 2016-10-17 | 2017-02-22 | 铜仁中能天然气有限公司 | Device used in surveying calculation method for accurately acquiring shale gas content |
| CN106970001A (en) * | 2017-04-28 | 2017-07-21 | 中国石油天然气股份有限公司 | The simulating test device and method of loss tolerance in the test of shale air content |
| CN107192632A (en) * | 2017-04-29 | 2017-09-22 | 贵州大学 | A kind of device and method for measuring shale gas reservoir air content |
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Application publication date: 20181009 |