CN105930604B - Method and device for determining shale gas exploitation degree - Google Patents
Method and device for determining shale gas exploitation degree Download PDFInfo
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- CN105930604B CN105930604B CN201610280470.7A CN201610280470A CN105930604B CN 105930604 B CN105930604 B CN 105930604B CN 201610280470 A CN201610280470 A CN 201610280470A CN 105930604 B CN105930604 B CN 105930604B
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- 238000000034 method Methods 0.000 title claims abstract description 49
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 125
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 125
- 238000005065 mining Methods 0.000 claims abstract description 85
- 238000004458 analytical method Methods 0.000 claims abstract description 15
- 238000011084 recovery Methods 0.000 claims description 64
- 238000004519 manufacturing process Methods 0.000 claims description 33
- 238000005259 measurement Methods 0.000 claims description 14
- 238000013481 data capture Methods 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims 1
- 230000009466 transformation Effects 0.000 claims 1
- 238000011161 development Methods 0.000 abstract description 12
- 238000005070 sampling Methods 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 264
- 238000010586 diagram Methods 0.000 description 7
- 230000006870 function Effects 0.000 description 7
- 239000011435 rock Substances 0.000 description 7
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 239000004215 Carbon black (E152) Substances 0.000 description 4
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 229930195733 hydrocarbon Natural products 0.000 description 4
- 150000002430 hydrocarbons Chemical class 0.000 description 4
- 238000011017 operating method Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 2
- GMACPFCYCYJHOC-UHFFFAOYSA-N [C].C Chemical compound [C].C GMACPFCYCYJHOC-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000001294 propane Substances 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 150000001875 compounds Chemical group 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
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- 150000002894 organic compounds Chemical class 0.000 description 1
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- 229920001296 polysiloxane Polymers 0.000 description 1
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Abstract
The embodiment of the application provides a method and a device for determining shale gas exploitation degree. The method comprises the following steps: acquiring shale gas samples and gas reservoir pressure data of sampling points in different mining periods; performing carbon isotope determination on the shale gas sample to generate carbon isotope values of the shale gas sample of sampling points in different mining periods; performing fitting analysis on gas reservoir pressure data of sampling points in different mining periods and carbon isotope values of the shale gas sample, and establishing a fitting relation between the gas reservoir pressure and the carbon isotope values; determining a carbon isotope value of the target single well based on the fitting relation and the acquired gas reservoir pressure of the target single well; and determining the exploitation degree of the target single well according to the carbon isotope value. By utilizing the technical scheme provided by the embodiment of the invention, the exploitation degree of the shale gas can be accurately determined, and the efficient development of the shale gas is realized.
Description
Technical field
The present invention relates to a kind of method of oil-gas exploration and development technical field more particularly to determining shale gas exploitation degree and
Device.
Background technique
In oil-gas exploration technical field, shale gas is a kind of to be buried with free state or adsorbed state in fine and close shale
Natural gas in layer or shale layer.Shale gas belongs to unconventional petroleum resources, and stock number is huge, is current global exploration and development
Hot fields.Currently, the main preservation of the shale gas of exploration and development is in oil source rock, including free gas and adsorbed gas.Due to physics
The difference of chemical property, in shale gas development process, free gas first overflows, and overflows after adsorbed gas, that is to say, that at the beginning of shale gas well
The phase shale gas of extraction is mainly free gas, and the gas output per well of free gas is higher；With the failure that free gas acquires, adsorbed gas
It gradually desorbs, is released from rock surface, become the main object of acquisition, gas output per well declines quickly.
In the prior art, current shale gas exploitation degree is speculated generally according to the amplitude of variation of gas production, works as gas production
When sharp fall, it can speculate that the free gas in shale gas starts failure, adsorbed gas starts gradually to release.The prior art
In method cannot accurately determine free gas acquisition failure node, can only substantially judge to obtain whether free gas starts to decline
It exhausts.Therefore, it in the case where cannot accurately determine free gas failure node, in shale gas development process, cannot provide enough
Time window for taking engineering measure in time.
Summary of the invention
A kind of method and device for being designed to provide determining shale gas exploitation degree of the application, can accurately determine page
The recovery percent of rock gas realizes the Efficient Development of shale gas.
To achieve the goals above, described the present invention provides a kind of method and device of determining shale gas exploitation degree
Method and device is specifically achieved in that
A kind of method of determining shale gas exploitation degree, which comprises
Sampled point is obtained in the shale gas sample and gas reservoir pressure data of different mining periods；
Carbon isotope measurement is carried out to the shale gas sample, generates sampled point in different mining period shale gas samples
Carbon isotope value；
Sampled point is intended in the gas reservoir pressure data of different mining periods and the carbon isotope value of shale gas sample
Analysis is closed, the fit correlation between gas reservoir pressure and carbon isotope value is established；
The gas reservoir pressure of target individual well based on the fit correlation and acquisition determines the carbon isotope of the target individual well
Value；
The recovery percent of the target individual well is determined according to the carbon isotope value.
Optionally, in one embodiment of the invention, described that the target individual well is determined according to the carbon isotope value
Recovery percent include:
When the carbon isotope value is located at first threshold section, determine that the recovery percent of the target individual well is in free
Gas mining phase；
When the carbon isotope value is located at second threshold section, determine that the recovery percent of the target individual well is in free
Gas and adsorbed gas mixed mining stage；
When the carbon isotope value is located at third threshold interval, determine that the recovery percent of the target individual well is in absorption
Gas mining phase.
Optionally, in one embodiment of the invention, the mining period include initial stage of production, stable production period, drop it is antenatal
Phase, drop produce mid-term, drop post-partum period.
Optionally, in one embodiment of the invention, the sampled point is set to three mouthfuls or three mouthfuls or more of shale
In gas production well.
Optionally, in one embodiment of the invention, the method also includes:
When the recovery percent of the target individual well is in free gas and adsorbed gas mixed mining stage, to gas recovery facility into
Row acidfracturing treatment；
When the recovery percent of the target individual well is in adsorbed gas mining phase, accelerate the gas producting rate of shale gas.
A kind of device of determining shale gas exploitation degree, described device include:
Data capture unit, for obtaining sampled point in the shale gas sample and gas reservoir pressure data of different mining periods；
Carbon isotope determination unit generates sampled point not for carrying out carbon isotope measurement to the shale gas sample
With the carbon isotope value of mining period shale gas sample；
Fitting Analysis unit, for sampled point different mining periods gas reservoir pressure data and shale gas sample
Carbon isotope value is fitted analysis, establishes the fit correlation between gas reservoir pressure and carbon isotope value；
Carbon isotope value determination unit, for the gas reservoir pressure based on the fit correlation and the target individual well of acquisition, really
The carbon isotope value of the fixed target individual well；
Recovery percent determination unit, for determining the recovery percent of the target individual well according to the carbon isotope value.
Optionally, in one embodiment of the invention, the recovery percent determination unit includes:
First mining phase determination unit, described in determining when the carbon isotope value is located at first threshold section
The recovery percent of target individual well is in free gas mining phase；
Second mining phase determination unit, described in determining when the carbon isotope value is located at second threshold section
The recovery percent of target individual well is in free gas and adsorbed gas mixed mining stage；
Third mining phase determination unit, described in determining when the carbon isotope value is located at third threshold interval
The recovery percent of target individual well is in adsorbed gas mining phase.
Optionally, in one embodiment of the invention, the mining period include initial stage of production, stable production period, drop it is antenatal
Phase, drop produce mid-term, drop post-partum period.
Optionally, in one embodiment of the invention, the sampled point is set to three mouthfuls or three mouthfuls or more of shale
In gas production well.
Optionally, in one embodiment of the invention, described device further include:
Acidfracturing treatment unit is in free gas and adsorbed gas mixed mining rank for the recovery percent when the target individual well
Duan Shi carries out acidfracturing treatment to gas recovery facility；
Gas production accelerator module, for accelerating page when the recovery percent of the target individual well is in adsorbed gas mining phase
The gas producting rate of rock gas.
The method and device of determining shale gas exploitation degree proposed by the present invention, can be to pre-set sampled point not
Carbon isotope value and gas reservoir pressure data with the shale gas sample of mining period are fitted analysis, establish gas reservoir pressure and
Fit correlation between carbon isotope value.It, can be true according to the gas reservoir pressure of the fit correlation and the target individual well of acquisition
Determine the carbon isotope value of the target individual well, and determines the recovery percent of the target individual well according to the carbon isotope value.Page
The carbon isotope value of hydrocarbon gas in rock gas and the yield of shale gas have it is larger contact, and the yield of shale gas and shale gas
There is direct relation in development phase, therefore, the exploitation rank of shale gas target individual well can be determined by the carbon isotope value of shale gas
Section.And the measurement cost of shale gas carbon isotope is higher, the time is longer, and the gas reservoir pressure and carbon that base is established in this present embodiment are same
Fit correlation between the element value of position, the gas reservoir pressure read in real time according to Instruments in Well Site can accurately obtain the same position of carbon of shale gas
Element value, improves the efficiency for determining shale gas exploitation degree.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The some embodiments recorded in application, for those of ordinary skill in the art, in the premise of not making the creative labor property
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of method flow diagram of embodiment of determining shale gas exploitation degree method provided by the invention；
Fig. 2 is a kind of modular structure schematic diagram of embodiment of determining shale gas exploitation degree device provided by the invention；
Fig. 3 is a kind of modular structure schematic diagram of embodiment of recovery percent determination unit 25 provided by the invention；
Fig. 4 is the method flow diagram of another embodiment of determining shale gas exploitation degree method provided by the invention.
Specific embodiment
In order to make those skilled in the art better understand the technical solutions in the application, below in conjunction with the application reality
The attached drawing in example is applied, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described implementation
Example is merely a part but not all of the embodiments of the present application.Based on the embodiment in the application, this field is common
The application protection all should belong in technical staff's every other embodiment obtained without making creative work
Range.
The method of herein described determining shale gas exploitation degree is described in detail with reference to the accompanying drawing.Fig. 1 is
A kind of method flow diagram of embodiment of determining shale gas exploitation degree method provided by the invention.Although this application provides such as
Following embodiments or method operating procedure shown in the drawings, but in the method based on routine or without creative labor
It may include more or less operating procedure.In the step of there is no necessary causalities in logicality, these steps
Execution sequence be not limited to provided by the embodiments of the present application execute sequence.The determination shale gas exploitation journey of the method in practice
It can execute according to embodiment or method shown in the drawings sequence when perhaps device executes during degree or execute parallel
(such as environment of parallel processor or multiple threads).
A kind of embodiment of specific determining shale gas exploitation degree method provided by the present application is as shown in Figure 1, the side
Method may include:
S1: shale gas sample, gas reservoir pressure data of the sampled point in different mining periods are obtained.
In the embodiment of the present invention, the position of the different depth in existing shale gas production well is can be set in the sampled point
Set place, in the present embodiment, in order to realize the harmony and generality of sampling, the sampled point can be set to three mouthfuls or
In three mouthfuls or more of shale gas production well.The mining period is the different mining phases of shale gas production well, specifically be can wrap
Include: initial stage of production, stable production period, drop antenatal period, drop produce mid-term, drop post-partum period.In the present embodiment, shale gas production well can be passed through
Real-time Production development data judge the mining phase that shale gas production well is currently at.Certainly, the range of acquisition cost it
Interior, sampled point can be arranged as much as possible, and sampled data abundant can establish accurate fit correlation and provide number to be subsequent
According to basis.
The shale gas sample and gas reservoir pressure data of different mining periods are acquired at sampled point.The shale gas sample
For the measurement of subsequent shale gas carbon isotope value, in shale gas sample collection process, shale gas sample can be stored
In anti-corrosion steel cylinder, the pressure of the anti-corrosion steel cylinder is set as 1~2 megapascal, and volume is 1 liter.The shale stored in anti-corrosion steel cylinder
Gas is more stable, and the shale gas methane that is stored in anti-corrosion steel cylinder, ethane, the carbon isotope in propane do not change over time.Institute
State gas reservoir pressure data for and the carbon isotope value of the shale gas sample be fitted, the gas reservoir pressure data can be from
The reading data that Instruments in Well Site disk is shown can recorde gas reservoir pressure change of the sampled point at different mining period sampled points.
S2: carrying out carbon isotope measurement to the shale gas sample, generates sampled point in different mining period shale gas samples
The carbon isotope value of product.
In the present embodiment, shale gas compound structure is simple, easily separated, and the carbon isotope value in shale gas is as sensitive
Index can be used as the important parameter of mark shale gas recovery percent.In the present embodiment, the shale gas sample can be carried out
Carbon isotope measurement generates sampled point in the carbon isotope value of different mining period shale gas samples.Specific carbon isotope is surveyed
Determining instrument can be using the gas stable isotope of match Mo Feishier company, U.S. production than mass spectrograph Thermo Delta V
Advantage, analysis precision are ± 0.1 ‰.The gas stable isotope is than mass spectrograph Thermo Delta V
The advantage of Advantage is that any kind of inorganic or organic compound in shale gas simple gas can be converted into
Body, the carbon isotope value by measuring gas can increase measurement and survey accuracy.In the present embodiment, mainly in shale gas
The hydrocarbon gas such as methane, ethane, propane in carbon isotope measurement.
Measurement sampled point will own in the content of the carbon isotope of the collected shale gas sample of different mining periods respectively
The content of the carbon isotope of shale gas sample gathers, and generates sampled point in the same position of carbon of different mining period shale gas samples
Element value.
S3: sampled point is carried out in the gas reservoir pressure data of different mining periods and the carbon isotope value of shale gas sample
Fitting Analysis establishes the fit correlation between gas reservoir pressure and carbon isotope value.
By carbon isotope value of the sampled point in the gas reservoir pressure data and corresponding shale gas sample of different mining periods
It is fitted analysis, establishes the fit correlation between gas reservoir pressure and carbon isotope value.The fit correlation can reflect shale
Being closely connected between carbon isotope value in the exploitation gas reservoir pressure and shale gas sample of gas.In the present embodiment, work as shale gas
When Methane Carbon Isotope value is stable and higher in sample, gas reservoir pressure is higher, and shale gas yield is higher；When Methane Carbon Isotope value
It drastically reduces constantly, gas reservoir pressure is gradually lowered, shale gas yield relative drop.
In the present embodiment, sampled point can be excavated in the gas reservoir pressure data and shale gas sample of different mining periods
Fit correlation between carbon isotope value, and using the fit correlation as the subsequent ginseng for determining carbon isotope according to gas reservoir pressure
Examine template.
S4: the gas reservoir pressure of the target individual well based on the fit correlation and acquisition determines that the carbon of the target individual well is same
Position element value.
Using the fit correlation as reference template, the gas reservoir pressure of the target individual well based on the reference template and acquisition
Force data determines the carbon isotope value of the target individual well.
S5: the recovery percent of the target individual well is determined according to the carbon isotope value.
After the carbon isotope value for determining the target individual well, the target can be determined according to the carbon isotope value
The recovery percent of individual well.In the present embodiment, it can be seen from the above, when shale gas target individual well is in free gas mining phase,
Target list well yield is relatively high and stable at this time；When shale gas target individual well is in free gas and adsorbed gas mining phase, mesh
It marks single well yield to start to reduce, adsorbed gas starts to discharge；When shale gas target individual well is in adsorbed gas mining phase, target
Single well yield is lower.The recovery percent may include: free gas mining phase, free gas and adsorbed gas mining phase, inhale
Attached gas mining phase.The recovery percent that the target individual well is determined according to the carbon isotope value may include:
When the carbon isotope value is located at first threshold section, determine that the recovery percent of the target individual well is in free
Gas mining phase；
When the carbon isotope value is located at second threshold section, determine that the recovery percent of the target individual well is in free
Gas and adsorbed gas mixed mining stage；
When the carbon isotope value is located at third threshold interval, determine that the recovery percent of the target individual well is in absorption
Gas mining phase.
For the content difference of free gas and the carbon isotope in adsorbed gas away from larger, the carbon isotope value in free gas is higher, and
Carbon isotope value in adsorbed gas is lower.When measuring that carbon isotope value is located at first threshold section in target individual well, the mesh
The shale gas that mark individual well is exploited is based on free gas；It is located at second threshold section when measuring carbon isotope value in target individual well
When, the free gas in shale gas that the target individual well is exploited starts failure, and adsorbed gas is gradually desorbed and released, this
When the shale gas exploited based on the mixed gas of free gas and adsorbed gas；When measuring carbon isotope value position in target individual well
When third threshold interval, the shale gas that the target individual well is exploited is based on adsorbed gas.First threshold section, the second threshold
The cut off value for being worth section and third threshold interval can be true according to carbon isotope value and the relational expression of the individual well shale gas daily output
It is fixed.Certainly, the relational expression can be existing expression formula, be also possible to be fitted to obtain according to existing sampled data.
It should be noted that after determining the mining phase of the target individual well, it can be true according to current mining phase
Fixed necessary engineering measure.In the present embodiment, the method can also include:
When the recovery percent of the target individual well is in free gas and adsorbed gas mixed mining stage, to gas recovery facility into
Row acidfracturing treatment；
When the recovery percent of the target individual well is in adsorbed gas mining phase, accelerate the gas producting rate of shale gas.
When the recovery percent of the target individual well is in free gas and adsorbed gas mixed mining stage, that is, free gas is opened
When beginning failure, acidfracturing treatment can be carried out to gas recovery facility, expand the acquisition degree of free gas, extend the high yield of shale gas and steady
Produce the time.When the recovery percent of the target individual well is in adsorbed gas mining phase, accelerate the gas producting rate of shale gas, shortens
The mining time of shale gas realizes the Efficient Development of shale gas.
The method of determining shale gas exploitation degree proposed by the present invention, can be to pre-set sampled point in different exploitations
The carbon isotope value and gas reservoir pressure data of the shale gas sample in period are fitted analysis, establish gas reservoir pressure and the same position of carbon
Fit correlation between element value.According to the gas reservoir pressure of the fit correlation and the target individual well of acquisition, can determine described
The carbon isotope value of target individual well, and determine according to the carbon isotope value recovery percent of the target individual well.In shale gas
The carbon isotope value of hydrocarbon gas and the yield of shale gas have it is larger contact, and the exploitation rank of the yield of shale gas and shale gas
Section has direct relation, therefore, the development phase of shale gas target individual well can be determined by the carbon isotope value of shale gas.And page
The measurement cost of rock gas carbon isotope is higher, and the time is longer, the gas reservoir pressure and carbon isotope value that base is established in this present embodiment
Between fit correlation, the gas reservoir pressure read in real time according to Instruments in Well Site can accurately obtain the carbon isotope value of shale gas,
Improve the efficiency for determining shale gas exploitation degree.
Another aspect of the present invention also provides a kind of device of determining shale gas exploitation degree, and Fig. 2 is that the present invention provides determination
A kind of modular structure schematic diagram of embodiment of shale gas exploitation degree device, in conjunction with attached drawing 2, which includes:
Data capture unit 21, for obtaining sampled point in the shale gas sample and gas reservoir number pressure of different mining periods
According to；
Carbon isotope determination unit 22 generates sampled point and exists for carrying out carbon isotope measurement to the shale gas sample
The carbon isotope value of different mining period shale gas samples；
Fitting Analysis unit 23, for sampled point different mining periods gas reservoir pressure data and shale gas sample
Carbon isotope value be fitted analysis, establish the fit correlation between gas reservoir pressure and carbon isotope value；
Carbon isotope value determination unit 24, for the gas reservoir pressure based on the fit correlation and the target individual well of acquisition,
Determine the carbon isotope value of the target individual well；
Recovery percent determination unit 25, for determining the recovery percent of the target individual well according to the carbon isotope value.
The device of determining shale gas exploitation degree proposed by the present invention, can be to pre-set sampled point in different exploitations
The carbon isotope value and gas reservoir pressure data of the shale gas sample in period are fitted analysis, establish gas reservoir pressure and the same position of carbon
Fit correlation between element value.According to the gas reservoir pressure of the fit correlation and the target individual well of acquisition, can determine described
The carbon isotope value of target individual well, and determine according to the carbon isotope value recovery percent of the target individual well.In shale gas
The carbon isotope value of hydrocarbon gas and the yield of shale gas have it is larger contact, and the exploitation rank of the yield of shale gas and shale gas
Section has direct relation, therefore, the development phase of shale gas target individual well can be determined by the carbon isotope value of shale gas.And page
The measurement cost of rock gas carbon isotope is higher, and the time is longer, the gas reservoir pressure and carbon isotope value that base is established in this present embodiment
Between fit correlation, the gas reservoir pressure read in real time according to Instruments in Well Site can accurately obtain the carbon isotope value of shale gas,
Improve the efficiency for determining shale gas exploitation degree.
The mining period includes initial stage of production, stable production period, drop antenatal period, drop production mid-term, drop post-partum period.The sampled point
It is set in three mouthfuls or three mouthfuls or more of shale gas production well.Choose the shale gas sampling of the multiple mining periods in multiple places
The reliability of sampled data can be enhanced in product, improves the accuracy of fitting result.
According to the carbon isotope value that carbon isotope value determination unit 24 determines, the exploitation journey of the target individual well can be determined
Degree, Fig. 3 is a kind of modular structure schematic diagram of embodiment of recovery percent determination unit 25 provided by the invention, as shown in figure 3,
The recovery percent determination unit 25 may include:
First mining phase determination unit 31, for determining institute when the carbon isotope value is located at first threshold section
The recovery percent for stating target individual well is in free gas mining phase；
Second mining phase determination unit 32, for determining institute when the carbon isotope value is located at second threshold section
The recovery percent for stating target individual well is in free gas and adsorbed gas mixed mining stage；
Third mining phase determination unit 33, for determining institute when the carbon isotope value is located at third threshold interval
The recovery percent for stating target individual well is in adsorbed gas mining phase.
Fig. 4 is that the modular structure for another embodiment that the embodiment of the present application provides determining shale gas exploitation degree device is shown
It is intended to, in conjunction with attached drawing 4, which can also include
Acidfracturing treatment unit 41 is in free gas and adsorbed gas mixed mining for the recovery percent when the target individual well
When the stage, acidfracturing treatment is carried out to gas recovery facility；
Gas production accelerator module 42, for accelerating when the recovery percent of the target individual well is in adsorbed gas mining phase
The gas producting rate of shale gas.
According to the recovery percent of the target individual well of acquisition, gas production measure can be correspondingly adjusted, improves shale gas individual well
Collecting efficiency and the gas production daily output.
All the embodiments in this specification are described in a progressive manner, the highlights of each of the examples are with
The difference of other embodiments, the same or similar parts between the embodiments can be referred to each other.Especially for system reality
For applying example, since it is substantially similar to the method embodiment, so being described relatively simple, related place is referring to embodiment of the method
Part explanation.
Although depicting the application by embodiment, it will be appreciated by the skilled addressee that the application there are many deformation and
Variation is without departing from spirit herein, it is desirable to which the attached claims include these deformations and change without departing from the application's
Spirit.
Foregoing description involved in each embodiment is only the application in some embodiments in the application in the application,
Embodiment modified slightly can also carry out each embodiment of above-mentioned the application on the basis of certain method, apparatus, unit
Scheme.Certainly, meet process method step described in the application the various embodiments described above other without creative deformations,
Still identical application may be implemented, details are not described herein.
Although this application provides the method operating procedure as described in embodiment or flow chart, based on conventional or noninvasive
The labour for the property made may include more or less operating procedure.The step of enumerating in embodiment sequence is only numerous steps
One of execution sequence mode, does not represent and unique executes sequence.It, can when device or client production in practice executes
To execute or parallel execute (such as at parallel processor or multithreading according to embodiment or method shown in the drawings sequence
The environment of reason).
The device or unit that above-described embodiment illustrates can specifically realize by computer chip or entity, or by having
The product of certain function is realized.For convenience of description, it is divided into various units when description apparatus above with function to describe respectively.
The function of each unit can be realized in the same or multiple software and or hardware when implementing the application.It is of course also possible to
Realization the unit for realizing certain function is combined by multiple subelements.
Method, apparatus or unit described herein can realize that controller is pressed in a manner of computer readable program code
Any mode appropriate is realized, for example, controller can take such as microprocessor or processor and storage can be by (micro-)
The computer-readable medium of computer readable program code (such as software or firmware) that processor executes, logic gate, switch, specially
With integrated circuit (Application Specific Integrated Circuit, ASIC), programmable logic controller (PLC) and embedding
Enter the form of microcontroller, the example of controller includes but is not limited to following microcontroller: ARC 625D, Atmel AT91SAM,
Microchip PIC18F26K20 and Silicone Labs C8051F320, Memory Controller are also implemented as depositing
A part of the control logic of reservoir.It is also known in the art that in addition to real in a manner of pure computer readable program code
Other than existing controller, completely can by by method and step carry out programming in logic come so that controller with logic gate, switch, dedicated
The form of integrated circuit, programmable logic controller (PLC) and insertion microcontroller etc. realizes identical function.Therefore this controller
It is considered a kind of hardware component, and hardware can also be considered as to the device for realizing various functions that its inside includes
Structure in component.Or even, it can will be considered as the software either implementation method for realizing the device of various functions
Module can be the structure in hardware component again.
Unit in herein described device can be in the general of computer executable instructions
Upper and lower described in the text, such as program module.Generally, program module includes executing particular task or realization specific abstract data class
The routine of type, programs, objects, component, data structure, class etc..The application can also be practiced in a distributed computing environment,
In these distributed computing environment, by executing task by the connected remote processing devices of communication network.In distribution
It calculates in environment, program module can be located in the local and remote computer storage media including storage equipment.
As seen through the above description of the embodiments, those skilled in the art can be understood that the application can
It is realized by the mode of software plus required hardware.Based on this understanding, the technical solution of the application is substantially in other words
The part that contributes to existing technology can be embodied in the form of software products, and can also pass through the implementation of Data Migration
It embodies in the process.The computer software product can store in storage medium, such as ROM/RAM, magnetic disk, CD, packet
Some instructions are included to use so that a computer equipment (can be personal computer, mobile terminal, server or network are set
It is standby etc.) execute method described in certain parts of each embodiment of the application or embodiment.
Claims (8)
1. a kind of method of determining shale gas exploitation degree, which is characterized in that the described method includes:
Sampled point is obtained in the shale gas sample and gas reservoir pressure data of different mining periods；
Carbon isotope measurement is carried out to the shale gas sample, it is same in the carbon of different mining period shale gas samples to generate sampled point
Position element value；
Sampled point is fitted point in the gas reservoir pressure data of different mining periods and the carbon isotope value of shale gas sample
Analysis, establishes the fit correlation between gas reservoir pressure and carbon isotope value；
The gas reservoir pressure of target individual well based on the fit correlation and acquisition determines the carbon isotope value of the target individual well；
The recovery percent of the target individual well is determined according to the carbon isotope value；
The recovery percent that the target individual well is determined according to the carbon isotope value includes:
When the carbon isotope value is located at first threshold section, determine that the recovery percent of the target individual well is opened in free gas
Adopt the stage；
When the carbon isotope value is located at second threshold section, determine the recovery percent of the target individual well be in free gas and
The adsorbed gas mixed mining stage；
When the carbon isotope value is located at third threshold interval, determine that the recovery percent of the target individual well is opened in adsorbed gas
Adopt the stage.
2. a kind of method of determining shale gas exploitation degree according to claim 1, which is characterized in that the mining period
Mid-term, drop post-partum period are produced including initial stage of production, stable production period, drop antenatal period, drop.
3. a kind of method of determining shale gas exploitation degree according to claim 1, which is characterized in that the sampled point is set
It is placed in three mouthfuls or three mouthfuls or more of shale gas production well.
4. a kind of method of determining shale gas exploitation degree according to claim 1, which is characterized in that the method is also wrapped
It includes:
When the recovery percent of the target individual well is in free gas and adsorbed gas mixed mining stage, acid is carried out to gas recovery facility
Pressure transformation；
When the recovery percent of the target individual well is in adsorbed gas mining phase, accelerate the gas producting rate of shale gas.
5. a kind of device of determining shale gas exploitation degree, which is characterized in that described device includes:
Data capture unit, for obtaining sampled point in the shale gas sample and gas reservoir pressure data of different mining periods；
Carbon isotope determination unit generates sampled point and opens in difference for carrying out carbon isotope measurement to the shale gas sample
Adopt the carbon isotope value of period shale gas sample；
Fitting Analysis unit, for same in the gas reservoir pressure data of different mining periods and the carbon of shale gas sample to sampled point
The plain value in position is fitted analysis, establishes the fit correlation between gas reservoir pressure and carbon isotope value；
Carbon isotope value determination unit determines institute for the gas reservoir pressure based on the fit correlation and the target individual well of acquisition
State the carbon isotope value of target individual well；
Recovery percent determination unit, for determining the recovery percent of the target individual well according to the carbon isotope value；
The recovery percent determination unit includes:
First mining phase determination unit, for determining the target when the carbon isotope value is located at first threshold section
The recovery percent of individual well is in free gas mining phase；
Second mining phase determination unit, for determining the target when the carbon isotope value is located at second threshold section
The recovery percent of individual well is in free gas and adsorbed gas mixed mining stage；
Third mining phase determination unit, for determining the target when the carbon isotope value is located at third threshold interval
The recovery percent of individual well is in adsorbed gas mining phase.
6. a kind of device of determining shale gas exploitation degree according to claim 5, which is characterized in that the mining period
Mid-term, drop post-partum period are produced including initial stage of production, stable production period, drop antenatal period, drop.
7. a kind of device of determining shale gas exploitation degree according to claim 5, which is characterized in that the sampled point is set
It is placed in three mouthfuls or three mouthfuls or more of shale gas production well.
8. a kind of device of determining shale gas exploitation degree according to claim 5, which is characterized in that described device is also wrapped
It includes:
Acidfracturing treatment unit is in free gas and adsorbed gas mixed mining stage for the recovery percent when the target individual well
When, acidfracturing treatment is carried out to gas recovery facility；
Gas production accelerator module, for accelerating shale gas when the recovery percent of the target individual well is in adsorbed gas mining phase
Gas producting rate.
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| CN106022943B (en) * | 2016-05-19 | 2020-01-10 | 中国石油天然气股份有限公司 | Method and device for determining gas production process |
| CN108665086B (en) * | 2017-04-01 | 2021-12-07 | 中国石油化工股份有限公司 | Shale gas well yield prediction calculation method |
| CN108982817B (en) * | 2018-08-28 | 2020-04-21 | 中国科学院力学研究所 | Shale gas content evaluation method based on methane carbon isotope |
| CN111458764B (en) * | 2019-01-22 | 2023-08-22 | 中国石油天然气股份有限公司 | Device and method for distinguishing two sections of lamp shadow set and four sections of lamp shadow set |
| CN109781580B (en) * | 2019-03-06 | 2021-10-29 | 西南石油大学 | Method for evaluating desorption effect of shale gas well oxidation modification promoting adsorbed gas |
| CN112392472B (en) | 2019-08-19 | 2022-08-02 | 中国石油天然气股份有限公司 | Method and device for determining integrated development mode of shale and adjacent oil layer |
| CN113449261B (en) * | 2020-03-25 | 2023-08-25 | 中国石油天然气股份有限公司 | Shale gas reservoir exploitation analysis method and device |
| CN111749685B (en) * | 2020-07-03 | 2023-04-07 | 承德石油高等专科学校 | Method and device for determining exploitation degree of oil and gas reservoir |
| CN115182724A (en) * | 2021-03-26 | 2022-10-14 | 中国石油天然气股份有限公司 | Shale gas potential prediction method and device |
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