CN107806916A - Method and device for determining reservoir reconstruction volume - Google Patents
Method and device for determining reservoir reconstruction volume Download PDFInfo
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Abstract
The embodiment of the application provides a method and a device for determining a reservoir reconstruction volume, wherein the method comprises the following steps: acquiring reservoir parameters and fluid parameters of an area where a target well is located; establishing a rule based on the balance of gas substances in the reservoir according to the reservoir parameters and the fluid parameters; carrying out production test on the target well, and acquiring the volume of accumulated gas production and first pressure; and determining the reservoir reconstruction volume according to the volume of the accumulated gas production and the first pressure and the rule. According to the scheme, a rule based on gas substance balance in the reservoir is established according to reservoir parameters and fluid parameters, and the specific reservoir modification volume is determined by using the rule, so that the technical problems of large error and low precision of the determined reservoir modification volume in the existing method are solved, and the technical effect of accurately and finely determining the reservoir modification volume is achieved.
Description
Technical field
The application is related to oil gas development technology field, the determination method and apparatus of more particularly to a kind of reservoir reconstruction volume.
Background technology
When carrying out oil and gas development to unconventional petroleum resourceses such as shale gas, due to the hole of reservoir where such petroleum resources
Porosity, permeability are relatively low, it usually needs first carry out fracturing reform, the fracture network of complexity is formed, to increase reservoir reconstruction
Volume (SRV, Stimulated Reservoir Volume), so as to more efficiently improve the production efficiency of oil gas.It is logical
Often, reservoir reconstruction volume is bigger, and the production efficiency of corresponding oil gas is relatively higher.Therefore, reservoir reconstruction volume is in evaluation shale
The reservoir reconstruction degree of the unconventional petroleum resourceses such as gas, the gas storage/oil mass for evaluating such petroleum resources reservoir have important work
With.
At present, in order to determine the reservoir reconstruction volume of target well region, it will usually pass through pressure build-up test technology
Estimate the size of reservoir reconstruction volume.The above method is when it is implemented, can first assume that improved each section of multistage splits in target well
Seam is single crack, and each section of crack is isometric contour；And it is the seepage state specified to assume the seepage state in reservoir.
On the premise of above-mentioned hypothesis, specific reservoir reconstruction volume is determined by pressure build-up test.But when it is implemented, mesh
Each section of crack in mark well actually might not all be single crack, and the length in each section of crack and height are also and certain complete
Portion is equal.Therefore, larger error often be present in first hypothesis being based on when existing method is implemented.In addition, above-mentioned side
Method is when it is implemented, it based on the seepage state in empirical hypothesis reservoir is a certain seepage state specified to be mostly.Therefore, it is existing
Second hypothesis that method is based on when being embodied is inaccurate, is objective, and then causes based on the existing of above-mentioned two hypothesis
When it is implemented, the technical problem that identified reservoir reconstruction volume error is big, precision is low often be present in method.
In view of the above-mentioned problems, not yet propose effective solution at present.
The content of the invention
The application embodiment provides a kind of determination method and apparatus of reservoir reconstruction volume, to solve in existing method
The technical problem that reservoir reconstruction volume error is big determined by existing, precision is low, reach fine, accurately determine reservoir reconstruction
The technique effect of volume.
The application embodiment provides a kind of determination method of reservoir reconstruction volume, including：
Obtain reservoir parameter, the fluid parameter of target well region；
According to the reservoir parameter, the fluid parameter, the rule balanced based on gaseous matter in reservoir is established；
Production test is carried out to the target well, to obtain the volume of cumulative gas production, first pressure；
According to the volume of the cumulative gas production, the first pressure, according to the rule, the reservoir reconstruction body is determined
Product.
In one embodiment, the reservoir parameter includes at least one of：
First reservoir pressure, reservoir temperature, reservoir porosity, reservoir rock density, reservoir gas saturation degree, the first unit
The volumetric gas absorption of quality reservoir, the Lang Gemiaoer pressure of reservoir.
In one embodiment, the fluid parameter includes first gas deviation factors.
In one embodiment, according to the reservoir parameter, the fluid parameter, establish based on gaseous matter in reservoir
The rule of balance, including：
The reservoir reconstruction volume for determining the target well region is constant temperature constant volume；
In the case where the reservoir reconstruction volume is constant temperature constant volume, the first free gas is determined by the equation of gas state
Quality, the second free gas quality, the first adsorbed gas quality, the second adsorbed gas constitution are determined by Lang Gemiaoer adsoption equations
Amount；
According to the first free gas quality, the second free gas quality, the first adsorbed gas quality, institute
The second adsorbed gas quality is stated, by gaseous matter equilibrium equation in reservoir, determines the rule.
In one embodiment, the first free gas quality is determined by the equation of gas state, including：
The first free gas quality is determined according to below equation：
In above formula,For the first free gas quality, PiFor the first reservoir pressure, VφgFor gas in reservoir reconstruction volume
Shared pore volume, MgFor the molal weight of gas, ZiFor first gas deviation factors, R is gas constant, TiFor reservoir temperature
Degree.
In one embodiment, the first adsorbed gas quality is determined by Lang Gemiaoer adsoption equations, including：
The first adsorbed gas quality is determined according to below equation：
In above formula,For the first adsorption volume quality, SRV is reservoir reconstruction volume, ρrFor reservoir rock density, VmFor
Limit adsorbance under reservoir temperature, PiFor the first reservoir pressure, PLFor the Lang Gemiaoer pressure under reservoir temperature, PSCFor standard
Atmospheric pressure, MgFor the molal weight of gas, ZSCFor the deviation factor for gas under standard state, R is gas constant, TSCIt is big for standard
Temperature degree.
In one embodiment, according to the first free gas quality, the second free gas quality, described
One adsorbed gas quality, the second adsorbed gas quality, by gaseous matter equilibrium equation in reservoir, determine the rule,
Including：
Below equation is defined as the rule：
In above formula, SRV is reservoir reconstruction volume, QgFor the volume of cumulative gas production, φ is reservoir porosity, SgFor reservoir
Gas saturation, ZSCFor the deviation factor for gas under standard state, TSCFor standard atmospheric temperature, PSCFor standard atmospheric pressure, TiFor
Reservoir temperature, PiFor the first reservoir pressure, ZiFor first gas deviation factors, P is first pressure, ZPFor under first pressure
Two deviation factor for gas, ρrFor reservoir rock density, VmFor the limit adsorbance under reservoir temperature, PiFor the first reservoir pressure, PL
For the Lang Gemiaoer pressure under reservoir temperature.
In one embodiment, production test is carried out to the target well, obtains volume, the first pressure of cumulative gas production
Power, including：
Production test is carried out to the target well, obtains the volume of instantaneous gas production；
In the case where the reservoir pressure of the target well meets preparatory condition, stop the production to the target well and survey
Examination；
The reservoir pressure after the stabilization in the target well for stopping production test being obtained, and by the reservoir after the stabilization
Pressure is as the first pressure；
The volume of the instantaneous gas production is counted, determines the volume of the cumulative gas production.
In one embodiment, the reservoir pressure of the target well meets preparatory condition, including：
The reservoir pressure of the target well and the absolute value of the difference of the first reservoir pressure are more than or equal to predetermined threshold value.
In one embodiment, it is determined that after the reservoir reconstruction volume, methods described includes：
According to the reservoir reconstruction volume, the gas-storing capacity of the reservoir of the target well region is predicted；
According to the gas-storing capacity of the reservoir, gas reservoir development is carried out to the reservoir.
The application embodiment further provides a kind of determining device of reservoir reconstruction volume, including：
Acquisition module, for obtaining reservoir parameter, the fluid parameter of target well region；
Module is established, for according to the reservoir parameter, the fluid parameter, establishing based on gaseous matter balance in reservoir
Rule；
Test module, for carrying out production test to the target well, to obtain the volume of cumulative gas production, the first pressure
Power；
Determining module, for the volume according to the cumulative gas production, the first pressure, according to the rule, it is determined that
The reservoir reconstruction volume.
In one embodiment, the module of establishing includes：
First determining unit, the reservoir reconstruction volume for determining the target well region are constant temperature constant volume；
Second determining unit, in the case of being constant temperature constant volume in the reservoir reconstruction volume, by gaseous state side
Journey determines the first free gas quality, the second free gas quality, and the first adsorbed gas is determined by Lang Gemiaoer adsoption equations
Quality, the second adsorbed gas quality；
3rd determining unit, for according to the first free gas quality, the second free gas quality, described
One adsorbed gas quality, the second adsorbed gas quality, by gaseous matter equilibrium equation in reservoir, determine the rule.
In the application embodiment, by according to specific reservoir parameter and gas parameter, establishing based on gas in reservoir
The rule of body material balance, and specific reservoir reconstruction volume is determined using above-mentioned rule, thus solve in existing method and deposit
Identified reservoir reconstruction volume error is big, technical problem that precision is low, where reaching accurate, subtly determining target well
The technique effect of the reservoir reconstruction volume in region.
Brief description of the drawings
, below will be to embodiment or existing in order to illustrate more clearly of the embodiment of the present application or technical scheme of the prior art
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments described in application, for those of ordinary skill in the art, do not paying the premise of creative labor
Under, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the process chart of the determination method of the reservoir reconstruction volume provided according to the application embodiment；
Fig. 2 is the composition structure chart of the determining device of the reservoir reconstruction volume provided according to the application embodiment；
Fig. 3 is the determination method/dress for providing reservoir reconstruction volume using the application embodiment in a Sample Scenario
Put the schematic flow sheet for the pressure break reservoir reconstruction volume for determining certain target well region；
Fig. 4 is the determination method/dress for providing reservoir reconstruction volume using the application embodiment in a Sample Scenario
Pressure is recovered and closed-in time relation schematic diagram after putting the stopping production test of acquisition；
Fig. 5 is the determination method/dress for providing reservoir reconstruction volume using the application embodiment in a Sample Scenario
The schematic diagram that the volume of cumulative gas production changes over time at different moments when putting the production test of acquisition.
Embodiment
In order that those skilled in the art more fully understand the technical scheme in the application, it is real below in conjunction with the application
The accompanying drawing in example is applied, the technical scheme in the embodiment of the present application is clearly and completely described, it is clear that described implementation
Example only some embodiments of the present application, rather than whole embodiments.It is common based on the embodiment in the application, this area
The every other embodiment that technical staff is obtained under the premise of creative work is not made, it should all belong to the application protection
Scope.
In view of existing method in order to determine reservoir reconstruction volume, often by pressure build-up test technology, estimation storage
The size of layer transformation volume.But the implementation of the above method usually requires to be based on following two hypothesis：Assuming that multistage in target well
Improved each section of crack is single crack, and each section of crack is isometric contour；Assuming that the seepage state in reservoir is specified
Seepage state.But when it is implemented, find that above-mentioned two is assumed inherently inaccurate, objective, causes false based on above-mentioned two
If the error of identified reservoir reconstruction volume is relatively large, precision is relatively low.That is, existing method is when it is implemented, often
In the presence of the technical problem that identified reservoir reconstruction volume error is big, precision is low.Basic original for producing above-mentioned technical problem
Cause, the application consider that a kind of new thinking, the angle of gaseous matter conservation out of reservoir, according to reservoir parameter can be used
The rule balanced based on gaseous matter in reservoir is established with fluid parameter, and reservoir reconstruction volume is determined using above-mentioned rule, from
And solve the technical problem that identified reservoir reconstruction volume error is big, precision is low present in existing method, reach accurate, smart
Carefully determine the technique effect of the reservoir reconstruction volume of target well region.
Based on above-mentioned thinking thinking, the application embodiment provides a kind of determination method of reservoir reconstruction volume.Specifically
The process chart of the determination method of the reservoir reconstruction volume provided according to the application embodiment shown in Fig. 1 can be provided.
The determination method for the reservoir reconstruction volume that the application embodiment provides, specifically may comprise steps of.
S11：Obtain reservoir parameter, the fluid parameter of target well region.
In one embodiment, above-mentioned target well can be specifically shale gas well, accordingly, above-mentioned target well location
Domain can be a kind of region containing shale reservoir.Certainly, it is necessary to which explanation, above-mentioned target well can also be other kinds of
Well.When it is implemented, the well of corresponding types can be selected with construction requirement as the case may be as target well.
In one embodiment, above-mentioned reservoir parameter can specifically include at least one of：First reservoir pressure, storage
Layer temperature, reservoir porosity, reservoir rock density, reservoir gas saturation degree, the first unit mass reservoir volumetric gas absorption,
Lang Gemiaoer pressure of reservoir etc..When it is implemented, can as the case may be and construction requirement, from above-mentioned cited multiple
One or more is selected to be used as above-mentioned reservoir parameter in parameter.In the present embodiment, in order to more accurately determine that reservoir changes
Make volume, above-mentioned all parameters can be selected as reservoir parameter during specific implementation.Certainly, it is necessary to which explanation, above-mentioned listed
The many kinds of parameters of act is intended merely to that the application embodiment is better described, when it is implemented, can also as the case may be and
Construction requirement, other kinds of parameter is introduced into as the one or more in above-mentioned reservoir parameter.
In the present embodiment, it is necessary to which explanation, above-mentioned first reservoir pressure, can specifically refer in primary condition
Under, i.e., before production test is carried out, the pressure of measured reservoir, that is, the reservoir of target well region is initially pressed before producing
Power.The volumetric gas absorption of above-mentioned first unit mass reservoir, it can specifically refer in an initial condition, that is, carrying out production survey
Before examination, the volumetric gas absorption of measured unit mass reservoir.
In one embodiment, above-mentioned fluid parameter can specifically include first gas deviation factors.Wherein, above-mentioned
One deviation factor for gas can be specifically the deviation factor for gas corresponding to the first reservoir pressure.
In one embodiment, in order to obtain accurate reservoir parameter and fluid parameter, when it is implemented, can
With by being logged well to target well region, and/or, drilling well obtains above-mentioned reservoir parameter.Specifically, for example, it can lead to
Cross well logging and obtain the parameters such as reservoir temperature, reservoir rock density；First reservoir pressure, the first list can also be obtained by drilling well
The parameters such as the volumetric gas absorption of position quality reservoir.Further according to reservoir parameter, above-mentioned fluid parameter is determined.
S12：According to the reservoir parameter, the fluid parameter, the rule balanced based on gaseous matter in reservoir is established.
In one embodiment, it is above-mentioned according to the reservoir parameter, the fluid parameter, establish based on gas in reservoir
The rule of material balance can specifically include herein below.
S12-1：The reservoir reconstruction volume for determining the target well region is constant temperature constant volume.
In the present embodiment, it is contemplated that in specific production test procedure, in the reservoir of target well region
Reservoir temperature often changes less, therefore the reservoir reconstruction volume of the target area can be defined as into constant temperature, that is, is carrying out
The reservoir temperature measured when the reservoir temperature measured before production test and progress production test, and stop measuring during production test
Reservoir temperature it is identical.Similar, it is contemplated that in specific production test procedure, the reservoir reconstruction body of target well region
Generally with the region beyond the reconstruction scope seepage flow does not occur for product, therefore, can be by above-mentioned reservoir formation volume for the ease of processing
It is defined as constant volume, i.e., is measured in the whole reservoir reconstruction volume and progress production test measured before carrying out production test whole
Reservoir reconstruction volume, and the whole reservoir reconstruction volume for stopping measuring during production test are identical.In this way, can be in order to follow-up root
According to gaseous matter conservation in reservoir, accurately rule is established.
S12-2：In the case where the reservoir reconstruction volume is constant temperature constant volume, first is determined certainly by the equation of gas state
By gaseous mass, the second free gas quality, the first adsorbed gas quality, the second absorption are determined by Lang Gemiaoer adsoption equations
Gaseous mass.
In one embodiment, it is contemplated that in specific production test procedure, volume data is relative to qualitative data
Numerical value change is relatively large, should not handle during use, and error easily occur.Therefore, in the present embodiment, phase is not determined
The volume data for the gas answered, and it is to determine the qualitative data of corresponding gas (i.e.：First free gas quality, second are freely
Gaseous mass, the first adsorbed gas quality, the second adsorbed gas quality), can subsequently to be found according to gaseous mass data
Inherent changing rule feature, establish accurately rule.
In the present embodiment, what above-mentioned first free gas quality referred specifically to can be base before carrying out production test
Free volume quality in reservoir reconstruction volume determined by the equation of gas state.Above-mentioned first adsorbed gas quality refers specifically to
Can be carry out production test before, adsorbed gas in the reservoir reconstruction volume based on determined by Lang Gemiaoer adsoption equations
Quality.Accordingly, what above-mentioned second free gas quality referred specifically to can be after carrying out production test, based on gaseous state side
Free volume quality in reservoir reconstruction volume determined by journey.What above-mentioned second adsorbed gas quality referred specifically to can carry out
After production test, the quality of adsorbed gas in the reservoir reconstruction volume based on determined by Lang Gemiaoer adsoption equations.
In one embodiment, in order to relatively accurately determine the first free gas quality, above by gas shape
State equation determines the first free gas quality, can specifically include herein below：
The first free gas quality is determined according to below equation：
In above formula,For the first free gas quality, PiFor the first reservoir pressure, VφgFor gas in reservoir reconstruction volume
Shared pore volume, MgFor the molal weight of gas, ZiFor first gas deviation factors, R is gas constant, TiFor reservoir temperature
Degree.
In one embodiment, in order to relatively accurately determine the first adsorbed gas quality, above by Lang Gemiao
You determine the first adsorbed gas quality by adsoption equation, can specifically include herein below：
The first adsorbed gas quality is determined according to below equation：
In above formula,For the first adsorption volume quality, SRV is reservoir reconstruction volume, ρrFor reservoir rock density, VmFor
Limit adsorbance under reservoir temperature, PiFor the first reservoir pressure, PLFor the Lang Gemiaoer pressure under reservoir temperature, PSCFor standard
Atmospheric pressure, MgFor the molal weight of gas, ZSCFor the deviation factor for gas under standard state, R is gas constant, TSCIt is big for standard
Temperature degree.
In one embodiment, it is specific real in order to determine the second free gas quality, and the second adsorbed gas quality
Shi Shi, it can first carry out following analyzing and processing：It is contemplated that under conditions of reservoir reconstruction body is constant temperature constant volume, it is assumed that carry out
After the production test of a period of time, the volume of cumulative gas production can be set to Qg, the volume of cumulative water production can be set to Qw.Stop
After only production test, i.e. closing well, after the stabilization in target well, the bottom pressure P of the stabilization measured is as reservoir pressure.Consider
Under conditions of reservoir reconstruction body is constant temperature constant volume, during production test, after stopping production test, reservoir temperature is not
Become, i.e. TP=Ti.Wherein, TPIt is the reservoir temperature after production test, TiIt is the reservoir temperature before production test.In view of accumulation
The volume of aquifer yield generally only accounts for the comparatively small part in reservoir reconstruction volume void volume, therefore, the aquifer yield
Volume can approximation ignore.On the basis of above-mentioned analyzing and processing, it can determine that the second free gas quality and second is inhaled respectively
Attached gaseous mass.
In one embodiment, in order to relatively accurately determine the second free gas quality, when it is implemented, can be by
According to below equation processing, to determine the second free gas quality：
In above formula,For the second free gas quality, P is first pressure, VφgFor shared by gas in reservoir reconstruction volume
Pore volume, MgFor the molal weight of gas, ZPFor the second gas deviation factors under first pressure, R is gas constant, Ti
For reservoir temperature.
In the present embodiment, it is necessary to explanation, after what above-mentioned first pressure can specifically represent is production test, and
Measured reservoir pressure after target well recovers stable.
In one embodiment, in order to relatively accurately determine the second adsorbed gas quality, when it is implemented, can be by
According to below equation processing, to determine the second adsorbed gas quality：
In above formula,For the first adsorption volume quality, SRV is reservoir reconstruction volume, ρrFor reservoir rock density, VmFor
Limit adsorbance under reservoir temperature, PiFor the first reservoir pressure, PLFor the Lang Gemiaoer pressure under reservoir temperature, PSCFor standard
Atmospheric pressure, MgFor the molal weight of gas, ZSCFor the deviation factor for gas under standard state, R is gas constant, TSCIt is big for standard
Temperature degree.
S12-3：According to the first free gas quality, the second free gas quality, first adsorbed gas
Quality, the second adsorbed gas quality, by gaseous matter equilibrium equation in reservoir, determine the rule.
In one embodiment, when it is implemented, the angle of gaseous mass conservation can go out out of reservoir reconstruction volume
Hair, can first according to the first free gas quality, the second free gas quality, the first adsorbed gas quality,
The second adsorbed gas quality, establishes gaseous matter equilibrium equation in reservoir；Balanced further according to gaseous matter in above-mentioned reservoir
Equation, establish the above-mentioned rule based on gaseous matter conservation in reservoir.
In one embodiment, put down when it is implemented, gaseous matter in the reservoir can be established according to below equation
Weigh equation：
In above formula,For the first free gas quality,For the first adsorption volume quality,For the second free gas
Weight,For the second adsorption volume quality, mProductionFor the quality of the volume of cumulative gas production.
In one embodiment, the quality of the volume of above-mentioned cumulative gas production, can specifically be determined according to below equation：
In above formula, mProductionFor the quality of the volume of cumulative gas production, QgFor the volume of cumulative gas production, ρrFor under standard state
Gas density, PSCFor standard atmospheric pressure, MgFor the molal weight of gas, ZSCFor the deviation factor for gas under standard state, R is
Gas constant, TSCFor standard atmospheric temperature.
In one embodiment, when it is implemented, can according to gaseous matter equilibrium equation in above-mentioned reservoir, it is determined that with
Lower formula is as the rule：
In above formula, SRV is reservoir reconstruction volume, QgFor the volume of cumulative gas production, φ is reservoir porosity, SgFor reservoir
Gas saturation, ZSCFor the deviation factor for gas under standard state, TSCFor standard atmospheric temperature, PSCFor standard atmospheric pressure, TiFor
Reservoir temperature, PiFor the first reservoir pressure, ZiFor first gas deviation factors, P is first pressure, ZPFor under first pressure
Two deviation factor for gas, ρrFor reservoir rock density, VmFor the limit adsorbance under reservoir temperature, PiFor the first reservoir pressure, PL
For the Lang Gemiaoer pressure under reservoir temperature.
S13：Production test is carried out to the target well, and obtains the volume of cumulative gas production, first pressure.
In the present embodiment, in order to determine the volume of specific cumulative gas production and first pressure, when it is implemented, can
So that production test, and corresponding data acquisition are carried out to target well in such a way.
In the present embodiment, after above-mentioned first pressure can be specifically production test, and treat that target well clear-cutting forestland is steady
Measured reservoir pressure numerical value after fixed.
S13-1：Production test is carried out to the target well, obtains the volume of instantaneous gas production.
In the present embodiment, when it is implemented, can obtain production in real time when carrying out production test to target well and survey
The volume of the instant productivity of Each point in time during examination.
In the present embodiment, above-mentioned production test can be specifically that the actual production development process of simulation is entered to target well
Row simulated production, so as to relatively accurately determine that in real production process each relevant parameter in reservoir is occurred
Change.
S13-2：In the case where the reservoir pressure of the target well meets preparatory condition, stop the life to the target well
Production test.
In the present embodiment, in order to reduce error, it is possible to implement the change of reservoir pressure in ground measure production test procedure
Change situation, when the situation of change of reservoir pressure is more than certain numerical value, it is believed that in the case of this kind, error is to test data
Influence relatively small, identified test data, such as first pressure, the precision of the volume of cumulative gas production are of a relatively high.Cause
This, when it is implemented, can stop in the case where the reservoir pressure of the target well meets preparatory condition to the target well
Production test.
In one embodiment, in order to reduce above-mentioned error, the reservoir pressure of above-mentioned target well meets preparatory condition, tool
Body can include：The reservoir pressure of the target well and the absolute value of the difference of the first reservoir pressure are more than or equal to predetermined threshold value.
Wherein, above-mentioned predetermined threshold value is specifically as follows 10MPa.Certainly, it is necessary to which explanation, above-mentioned cited predetermined threshold value are simply
The application embodiment is better described, when it is implemented, can as the case may be and construction requirement selects other conjunctions
Suitable numerical value is as above-mentioned predetermined threshold value.On the other hand, the application is not construed as limiting.
S13-3：The reservoir pressure after the stabilization in the target well for stopping production test being obtained, and by after the stabilization
Reservoir pressure as the first pressure.
In the present embodiment, when it is implemented, can be after production test be stopped, and treat the reservoir pressure in target well
Clear-cutting forestland to the pressure value after a stable numerical value, is obtained, i.e., it is stable after reservoir pressure, and by the storage after stable
Stressor layer is as above-mentioned first pressure.
S13-4：The volume of the instantaneous gas production is counted, determines the volume of the cumulative gas production.
In the present embodiment, in order to determine the volume of the cumulative gas production in production test procedure, when it is implemented, can
With the volume by counting the instantaneous gas production of Each point in time in production process, the volume of above-mentioned cumulative gas production is obtained.
S14：According to the volume of the cumulative gas production, the first pressure, according to the rule, determine that the reservoir changes
Make volume.
In the present embodiment, in order to determine reservoir reconstruction volume, when it is implemented, will can be obtained by production test
The volume and first pressure of the cumulative gas production obtained are substituted into the above-mentioned rule balanced based on gaseous matter in reservoir, so as to calculate
Obtain corresponding reservoir reconstruction volume.
In the embodiment of the present application, compared to prior art, it is contemplated that gaseous matter conservation in reservoir, according to target well institute
Reservoir parameter and gas parameter in region, the rule balanced based on gaseous matter in reservoir is established, and using above-mentioned rule really
Fixed specific reservoir reconstruction volume, thus it is big, smart to solve identified reservoir reconstruction volume error present in existing method
Low technical problem is spent, reaches the technique effect of reservoir reconstruction volume that is accurate, subtly determining target well region.
In one embodiment, in order to carry out more effective gas reservoir development to the reservoir of target well region,
After determining the reservoir reconstruction volume, methods described can also specifically include herein below.
S1：According to the reservoir reconstruction volume, the gas-storing capacity of the reservoir of the target well region is predicted.
S2：According to the gas-storing capacity of the reservoir, gas reservoir development is carried out to the reservoir.
In the present embodiment, when it is implemented, can predict that the control of the target well is stored up according to reservoir reconstruction volume
Amount；Again using the control reserve of the target well as reference frame, specific gas reservoir development is instructed.
In one embodiment, above-mentioned target well can be specifically shale gas well, accordingly, above-mentioned target well location
Domain can be a kind of region containing shale reservoir.Certainly, it is necessary to which explanation, above-mentioned target well can also be other kinds of
Well.For example, target well can also be carbonate gas well.Accordingly, it is determined that the regular mistake balanced based on gaseous matter in reservoir
Journey also can do corresponding adjustment according to the type of target well.When it is implemented, it can be selected as the case may be with construction requirement
The well of corresponding types is as target well.
As can be seen from the above description, the determination method for the reservoir reconstruction volume that the application embodiment provides, is examined
Consider gaseous matter conservation in reservoir, according to the reservoir parameter and gas parameter of target well region, establish based in reservoir
The rule of gaseous matter balance, and specific reservoir reconstruction volume is determined using above-mentioned rule, thus solve in existing method
The technical problem that reservoir reconstruction volume error is big determined by existing, precision is low, reach accurate, subtly determine target well institute
In the technique effect of the reservoir reconstruction volume in region；Further through determining the first free gas quality, the second free gas constitution respectively
Amount, the first adsorbed gas quality, the second adsorbed gas quality, according to above-mentioned qualitative data, rather than corresponding volume data, really
The fixed rule balanced based on gaseous matter in reservoir, reach the accurate technique effect for determining effect preferably rule；Also by
In the case that the reservoir pressure of the target well meets preparatory condition, stop production test, measure first pressure and accumulation aerogenesis
The volume of amount, further improve the degree of accuracy of identified reservoir reconstruction volume.
Based on same inventive concept, a kind of determining device of reservoir reconstruction is additionally provided in embodiment of the present invention, it is as follows
Described in the embodiment in face.It is similar to the determination method of reservoir reconstruction to solve the principle of problem due to device, therefore reservoir reconstruction
Determining device implementation may refer to reservoir reconstruction determination method implementation, repeat part repeat no more.It is following to be used
, term " unit " or " module " can realize the combination of the software and/or hardware of predetermined function.Although following examples institute
The device of description is preferably realized with software, but hardware, or the combination of software and hardware realization be also may and quilt
Conception.Referring to Fig. 2, it is that a kind of of the determining device of the reservoir reconstruction of the application embodiment forms structure chart, the device
It can include：Acquisition module 21, module 22, test module 23, determining module 24 are established, the structure is carried out specifically below
It is bright.
Acquisition module 21, it specifically can be used for reservoir parameter, the fluid parameter for obtaining target well region.
Module 22 is established, specifically can be used for, according to the reservoir parameter, the fluid parameter, establishing based on gas in reservoir
The rule of body material balance.
Test module 23, it specifically can be used for carrying out production test to the target well, to obtain the body of cumulative gas production
Product, first pressure.
Determining module 24, it specifically can be used for the volume according to the cumulative gas production, the first pressure, according to described
Rule, determine the reservoir reconstruction volume.
In one embodiment, in order to which according to the reservoir parameter, the fluid parameter, foundation is based on gas in reservoir
The rule of body material balance, the module 22 of establishing can specifically include following structure.
First determining unit, the reservoir reconstruction volume for being specifically determined for the target well region are determined for constant temperature
Hold.
Second determining unit, it specifically can be used for, in the case where the reservoir reconstruction volume is constant temperature constant volume, passing through gas
Body state equation determines the first free gas quality, the second free gas quality, and first is determined by Lang Gemiaoer adsoption equations
Adsorbed gas quality, the second adsorbed gas quality.
3rd determining unit, specifically it can be used for according to the first free gas quality, the second free gas constitution
Amount, the first adsorbed gas quality, the second adsorbed gas quality, by gaseous matter equilibrium equation in reservoir, it is determined that
The rule.
In one embodiment, in order to the target well carry out production test, obtain cumulative gas production volume,
First pressure, test module 23 can specifically include following structure.
Test cell, it specifically can be used for carrying out production test to the target well, obtain the volume of instantaneous gas production.
Stop element, it can specifically stop in the case where the reservoir pressure of the target well meets preparatory condition to institute
State the production test of target well.
Acquiring unit, it specifically can be used for obtaining the reservoir pressure after the stabilization in the target well for stopping production test
Power, and using the reservoir pressure after the stabilization as the first pressure.
It statistic unit, specifically can be used for the volume for counting the instantaneous gas production, determine the body of the cumulative gas production
Product.
In one embodiment, in order to carry out more effective gas reservoir development to the reservoir of target well region,
Said apparatus can also specifically include development module, wherein, above-mentioned development module specifically can be used for according to the reservoir reconstruction
Volume, predict the gas-storing capacity of the reservoir of the target well region；And according to the gas-storing capacity of the reservoir, the reservoir is entered
Row gas reservoir development.
Each embodiment in this specification is described by the way of progressive, identical similar portion between each embodiment
Divide mutually referring to what each embodiment stressed is the difference with other embodiment.It is real especially for system
For applying example, because it is substantially similar to embodiment of the method, so description is fairly simple, related part is referring to embodiment of the method
Part explanation.
It should be noted that system, device, module or unit that above-mentioned embodiment illustrates, specifically can be by computer
Chip or entity are realized, or are realized by the product with certain function.For convenience of description, in this manual, retouch
It is divided into various units when stating apparatus above with function to describe respectively.Certainly, can be the function of each unit when implementing the application
Realized in same or multiple softwares and/or hardware.
In addition, in this manual, adjective can be only used for an element or dynamic such as first and second
Make to make a distinction with another element or action, without requiring or implying any actual this relation or order.Permit in environment
Perhaps in the case of, be should not be interpreted as limited to reference to element or part or step (s) in only element, part or step one
It is individual, and can be one or more of element, part or step etc..
As can be seen from the above description, the determining device for the reservoir reconstruction volume that the application embodiment provides, is examined
Consider gaseous matter conservation in reservoir, according to the reservoir parameter and gas parameter of target well region, establish based in reservoir
The rule of gaseous matter balance, and specific reservoir reconstruction volume is determined using above-mentioned rule, thus solve in existing method
The technical problem that reservoir reconstruction volume error is big determined by existing, precision is low, reach accurate, subtly determine target well institute
In the technique effect of the reservoir reconstruction volume in region；Further through determining the first free gas quality, the second free gas constitution respectively
Amount, the first adsorbed gas quality, the second adsorbed gas quality, according to above-mentioned qualitative data, rather than corresponding volume data, really
The fixed rule balanced based on gaseous matter in reservoir, reach the accurate technique effect for determining effect preferably rule；Also by
In the case that the reservoir pressure of the target well meets preparatory condition, stop production test, measure first pressure and accumulation aerogenesis
The volume of amount, further improve the degree of accuracy of identified reservoir reconstruction volume.
It is embodied at one in Sample Scenario, the determination method, device of reservoir reconstruction volume is provided using the application, really
The pressure break reservoir reconstruction volume of certain fixed target well region.Specific implementation process can be with reference to shown in Fig. 3 in a scene
The determination method, device for providing reservoir reconstruction volume in example using the application embodiment determines certain target well region
The schematic flow sheet of pressure break reservoir reconstruction volume, and performed refering to herein below.
S1：Collect certain fractured well reservoir parameter and gas parameter (the i.e. reservoir parameter of target well region and fluid ginseng
Number), wherein, above-mentioned reservoir parameter can include：Initial reservoir pressure (i.e. the first reservoir pressure), temperature (i.e. reservoir temperature),
Porosity (i.e. reservoir porosity), reservoir rock density, gas saturation (i.e. reservoir gas saturation degree), initial reservoir pressure and
At a temperature of unit mass reservoir gas adsorption volume (i.e. the volumetric gas absorption of the first unit mass reservoir), Lang Gemiaoer pressure
(i.e. the Lang Gemiaoer pressure of reservoir)；The fluid parameter can include：Deviation factor for gas (i.e. first gas deviation factors).
S2：Space in the range of reservoir reconstruction volume (SRV) is considered as into constant temperature constant volume body (to be defined as reservoir reconstruction volume
Constant temperature constant volume), and according to above-mentioned reservoir parameter and gas parameter, establish gaseous matter equilibrium equation.
In the present embodiment, when it is implemented, can be according to the equation of gas stateCalculate
Free gas quality (i.e. the first free gas quality) in fractured well reservoir reconstruction volume SRV：
According to Lang Gemiaoer adsoption equations, adsorbed gas quality (i.e. first in fractured well reservoir reconstruction volume SRV can obtain
Adsorbed gas quality)：
After to production test for a period of time, cumulative gas production volume is Qg, the volume for adding up aquifer yield is Qw.Closing well
(stopping production test) carries out pressure and recovered to a certain stable bottom pressure p (i.e. first pressure).During production and closing well,
Reservoir fracturing temperature change can be ignored, i.e. reservoir temperature Tp=Ti.Because the volume of cumulative water production only accounts for reservoir reconstruction
The very small part of volume void volume, therefore cumulative water production influences can be ignored on gas pore volume.Treat extensive
When arriving pressure p again, free gas quality in fractured well reservoir reconstruction volume SRV (i.e. the second free gas quality) can be obtained：
When returning to pressure p, adsorbed gas quality (i.e. the second adsorbed gas constitution in fractured well reservoir reconstruction volume SRV
Amount), it can be released by Lang Gemiaoer adsoption equations：
Accordingly, cumulative gas production volume is QgWhen, accumulation aerogenesis quality can be defined as：
It because solution gas is relatively fewer, can be ignored, when it is implemented, according to gaseous matter equilibrium equation, can obtain：
Pore volume size shared by gas can be expressed as in reservoir reconstruction volume SRV again：
Vφg=SRV φ Sg (7)
(1) to (5) and (7) formula are updated to (6) formula again, gaseous matter in fractured well reservoir reconstruction volume SRV can be obtained and put down
Weighing apparatus equation be：
In above formula：pi、pL, p and pscIt is Lang Gemiaoer pressure, life under pressure, reservoir temperature under reservoir initial condition respectively
Reservoir average pressure and standard atmospheric pressure after production a period of time, units MPa；Zi、ZpAnd ZscRespectively gas under reservoir initial condition
Deviation factor for gas, zero dimension under deviation factor for gas and standard state when pressure is p under body deviation factors, reservoir temperature；Ti、
TscIt is reservoir temperature and standard atmospheric temperature respectively, unit K；R is gas constant, unit J/molK；VmFor under reservoir temperature
Limit adsorbance, unit m3/t；ρrReservoir matrix density, unit t/m3；MgGas molar quality, units/kg/mol；SRV reservoirs
Transform volume, unit m3；φ reservoir reconstruction volume internal porosities, zero dimension；SgGas saturation, zero dimension；ρscStandard state
Lower gas density, units/kg/m3。
S3：Closing well (stopping production test) after a period of time is produced, treats that bottom pressure recovers to a certain stationary value, now
Bottom pressure is gas pressure (i.e. first pressure) in reservoir reconstruction volume, and collects cumulative gas production (i.e. accumulation production before closing well
The volume of tolerance), to pressure recovery and closed-in time relation after stopping production test, and accumulated at different moments during production test
The volume of gas production changes over time relation and analyzed and processed, and determines first pressure and cumulative gas production volume.Specifically can be with
Refering to the determination method/dress for providing reservoir reconstruction volume using the application embodiment in a Sample Scenario shown in Fig. 4
Pressure is recovered and closed-in time relation schematic diagram, and showing in a scene shown in Fig. 5 after putting the stopping production test of acquisition
During the production test for applying the determination method, device of the application embodiment offer reservoir reconstruction volume to obtain in example at different moments
The schematic diagram that the volume of cumulative gas production changes over time
S4：According to the relation of cumulative gas and pressure after recovery, according to gaseous matter equilibrium equation, SRV sizes are calculated.
Specifically, according to formula (8), reservoir reconstruction volume SRV calculation formula (i.e. regular) can be obtained through deriving, identified accumulation is produced
The volume and first pressure of tolerance substitute into formula and calculate SRV values：
In above formula, SRV is reservoir reconstruction volume, QgFor the volume of cumulative gas production, φ is reservoir porosity, SgFor reservoir
Gas saturation, ZSCFor the deviation factor for gas under standard state, TSCFor standard atmospheric temperature, PSCFor standard atmospheric pressure, TiFor
Reservoir temperature, PiFor the first reservoir pressure, ZiFor first gas deviation factors, P is first pressure, ZPFor under first pressure
Two deviation factor for gas, ρrFor reservoir rock density, VmFor the limit adsorbance under reservoir temperature, PiFor the first reservoir pressure, PL
For the Lang Gemiaoer pressure under reservoir temperature.
During concrete operations, certain above-mentioned target well location shale horizontal well, relevant parameter is as follows：
Porosity：φ=2.5%, gas saturation：Sg=0.7, reservoir temperature：Ti=353K, standard atmospheric temperature：Tsc
=293K, deviation factor for gas：Zi=1.17, Zp=1.08, Zsc=1, reservoir reset pressure：pi=50MPa.
After improving progress production test for a period of time, data below is measured：
Reservoir average pressure：P=42.4MPa, standard atmospheric pressure：psc=0.101MPa, reservoir matrix density：ρ r=
2.6t/m3, reservoir temperature limit inferior adsorbance：Vm=1.28m3/ t, Lang Gemiaoer pressure：pL=2.68MPa, reservoir pressure p
When cumulative gas production：530.5ⅹ104m3。
Further according to the horizontal well reservoir reconstruction volume of formula (9) estimation：SRV=10039583m3.And then can basis
Reservoir reconstruction volume estimates the horizontal well control reserve：QControl=9342 X 104m3.It is used as and is instructed according to the horizontal well control reserve,
Gas reservoir development is carried out to the reservoir of the well region.
By above-mentioned Sample Scenario, the determination method of the reservoir reconstruction volume of the application embodiment offer is demonstrated, by
The gaseous matter conservation in view of reservoir, according to the reservoir parameter and gas parameter of target well region, establish based on storage
The rule of gaseous matter balance in layer, and specific reservoir reconstruction volume is determined using above-mentioned rule, can solve really existing
The technical problem that identified reservoir reconstruction volume error is big present in method, precision is low, reach accurate, subtly determine mesh
Mark the technique effect of the reservoir reconstruction volume of well region.
Although mentioning different embodiments in teachings herein, the application is not limited to be capable
Situation described by industry standard or embodiment etc., some professional standards or the implementation described using self-defined mode or embodiment
On the basis of embodiment amended slightly can also realize above-described embodiment it is identical, it is equivalent or it is close or deformation after it is anticipated that
Implementation result.Using the embodiment of the data acquisition after these modifications or deformation, processing, output, judgment mode etc., still may be used
To belong within the scope of the optional embodiment of the application.
Although this application provides the method operating procedure as described in embodiment or flow chart, based on conventional or noninvasive
The means for the property made can include more or less operating procedures.The step of being enumerated in embodiment order is only numerous steps
A kind of mode in execution sequence, does not represent unique execution sequence., can when device or client production in practice performs
So that according to embodiment, either method shown in the drawings order is performed or parallel performed (such as at parallel processor or multithreading
The environment of reason, even distributed data processing environment).Term " comprising ", "comprising" or its any other variant are intended to contain
Lid nonexcludability includes, so that process, method, product or equipment including a series of elements not only will including those
Element, but also the other element including being not expressly set out, or it is this process, method, product or equipment also to include
Intrinsic key element.In the absence of more restrictions, be not precluded from the process including the key element, method, product or
Other identical or equivalent elements in person's equipment also be present.
Device that above-described embodiment illustrates or module etc., it can specifically be realized by computer chip or entity, or by having
There is the product of certain function to realize.For convenience of description, it is divided into various modules during description apparatus above with function to retouch respectively
State.Certainly, the function of each module can be realized in same or multiple softwares and/or hardware when implementing the application,
The module for realizing same function can be realized by the combination of multiple submodule etc..Device embodiment described above is only
Schematically, for example, the division of the module, only a kind of division of logic function, can there is other draw when actually realizing
The mode of dividing, such as multiple module or components can combine or be desirably integrated into another system, or some features can be ignored,
Or do not perform.
It is also known in the art that in addition to realizing controller in a manner of pure computer readable program code, it is complete
Entirely can by by method and step carry out programming in logic come controller with gate, switch, application specific integrated circuit, may be programmed
The form of logic controller and embedded microcontroller etc. realizes identical function.Therefore this controller is considered one kind
Hardware component, and what its inside was included is used to realize that the device of various functions can also to be considered as the structure in hardware component.Or
Person even, not only can be able to will be the software module of implementation method but also can be hardware for realizing that the device of various functions is considered as
Structure in part.
The application can be described in the general context of computer executable instructions, such as program
Module.Usually, program module includes performing particular task or realizes routine, program, object, the group of particular abstract data type
Part, data structure, class etc..The application can also be put into practice in a distributed computing environment, in these DCEs,
By performing task by communication network and connected remote processing devices.In a distributed computing environment, program module can
With in the local and remote computer-readable storage medium including storage device.
As seen through the above description of the embodiments, those skilled in the art can be understood that the application can
Realized by the mode of software plus required general hardware platform.Based on such understanding, the technical scheme essence of the application
On the part that is contributed in other words to prior art can be embodied in the form of software product, the computer software product
It can be stored in storage medium, such as ROM/RAM, magnetic disc, CD, including some instructions are causing a computer equipment
(can be personal computer, mobile terminal, server, either network equipment etc.) perform each embodiment of the application or implementation
Method described in some parts of example.
Each embodiment in this specification is described by the way of progressive, same or analogous portion between each embodiment
Divide mutually referring to what each embodiment stressed is the difference with other embodiment.The application can be used for crowd
In more general or special purpose computing system environments or configuration.Such as：Personal computer, server computer, handheld device or
Portable set, laptop device, multicomputer system, the system based on microprocessor, set top box, programmable electronics are set
Standby, network PC, minicom, the DCE etc. of mainframe computer including any of the above system or equipment.
Although depicting the application by embodiment, it will be appreciated by the skilled addressee that the application have it is many deformation and
Change is without departing from spirit herein, it is desirable to which appended embodiment includes these deformations and changed without departing from the application.
Claims (12)
1. a kind of determination method of reservoir reconstruction volume, it is characterised in that including：
Obtain reservoir parameter, the fluid parameter of target well region；
According to the reservoir parameter, the fluid parameter, the rule balanced based on gaseous matter in reservoir is established；
Production test is carried out to the target well, to obtain the volume of cumulative gas production, first pressure；
According to the volume of the cumulative gas production, the first pressure, according to the rule, the reservoir reconstruction volume is determined.
2. according to the method for claim 1, it is characterised in that the reservoir parameter includes at least one of：
First reservoir pressure, reservoir temperature, reservoir porosity, reservoir rock density, reservoir gas saturation degree, the first unit mass
The volumetric gas absorption of reservoir, the Lang Gemiaoer pressure of reservoir.
3. according to the method for claim 1, it is characterised in that the fluid parameter includes first gas deviation factors.
4. according to the method for claim 1, it is characterised in that according to the reservoir parameter, the fluid parameter, establish base
In the rule that gaseous matter in reservoir balances, including：
The reservoir reconstruction volume for determining the target well region is constant temperature constant volume；
In the case where the reservoir reconstruction volume is constant temperature constant volume, the first free gas constitution is determined by the equation of gas state
Amount, the second free gas quality, the first adsorbed gas quality, the second adsorbed gas constitution are determined by Lang Gemiaoer adsoption equations
Amount；
According to the first free gas quality, the second free gas quality, the first adsorbed gas quality, described
Two adsorbed gas quality, by gaseous matter equilibrium equation in reservoir, determine the rule.
5. according to the method for claim 4, it is characterised in that the first free gas constitution is determined by the equation of gas state
Amount, including：
The first free gas quality is determined according to below equation：
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In above formula,For the first free gas quality, PiFor the first reservoir pressure, VφgFor shared by gas in reservoir reconstruction volume
Pore volume, MgFor the molal weight of gas, ZiFor first gas deviation factors, R is gas constant, TiFor reservoir temperature.
6. according to the method for claim 4, it is characterised in that the first adsorbed gas is determined by Lang Gemiaoer adsoption equations
Quality, including：
The first adsorbed gas quality is determined according to below equation：
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In above formula,For the first adsorption volume quality, SRV is reservoir reconstruction volume, ρrFor reservoir rock density, VmFor reservoir
At a temperature of limit adsorbance, PiFor the first reservoir pressure, PLFor the Lang Gemiaoer pressure under reservoir temperature, PSCFor normal atmosphere
Pressure, MgFor the molal weight of gas, ZSCFor the deviation factor for gas under standard state, R is gas constant, TSCFor normal atmosphere temperature
Degree.
7. according to the method for claim 4, it is characterised in that according to the first free gas quality, described second certainly
By gaseous mass, the first adsorbed gas quality, the second adsorbed gas quality, pass through gaseous matter balance side in reservoir
Journey, the rule is determined, including：
Below equation is defined as the rule：
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In above formula, SRV is reservoir reconstruction volume, QgFor the volume of cumulative gas production, φ is reservoir porosity, SgFor reservoir gas
Saturation degree, ZSCFor the deviation factor for gas under standard state, TSCFor standard atmospheric temperature, PSCFor standard atmospheric pressure, TiFor reservoir
Temperature, PiFor the first reservoir pressure, ZiFor first gas deviation factors, P is first pressure, ZPFor the second gas under first pressure
Body deviation factors, ρrFor reservoir rock density, VmFor the limit adsorbance under reservoir temperature, PiFor the first reservoir pressure, PLFor storage
Lang Gemiaoer pressure at a temperature of layer.
8. according to the method for claim 1, it is characterised in that production test is carried out to the target well, obtains accumulation production
Volume, the first pressure of tolerance, including：
Production test is carried out to the target well, obtains the volume of instantaneous gas production；
In the case where the reservoir pressure of the target well meets preparatory condition, stop the production test to the target well；
The reservoir pressure after the stabilization in the target well for stopping production test being obtained, and by the reservoir pressure after the stabilization
As the first pressure；
The volume of the instantaneous gas production is counted, determines the volume of the cumulative gas production.
9. according to the method for claim 8, it is characterised in that the reservoir pressure of the target well meets preparatory condition, bag
Include：
The reservoir pressure of the target well and the absolute value of the difference of the first reservoir pressure are more than or equal to predetermined threshold value.
10. according to the method for claim 1, it is characterised in that it is determined that after the reservoir reconstruction volume, methods described bag
Include：
According to the reservoir reconstruction volume, the gas-storing capacity of the reservoir of the target well region is predicted；
According to the gas-storing capacity of the reservoir, gas reservoir development is carried out to the reservoir.
A kind of 11. determining device of reservoir reconstruction volume, it is characterised in that including：
Acquisition module, for obtaining reservoir parameter, the fluid parameter of target well region；
Module is established, for according to the reservoir parameter, the fluid parameter, establishing the rule balanced based on gaseous matter in reservoir
Then；
Test module, for carrying out production test to the target well, to obtain the volume of cumulative gas production, first pressure；
Determining module, for the volume according to the cumulative gas production, the first pressure, according to the rule, it is determined that described
Reservoir reconstruction volume.
12. device according to claim 11, it is characterised in that the module of establishing includes：
First determining unit, the reservoir reconstruction volume for determining the target well region are constant temperature constant volume；
Second determining unit, it is true by the equation of gas state in the case of being constant temperature constant volume in the reservoir reconstruction volume
Fixed first free gas quality, the second free gas quality, by Lang Gemiaoer adsoption equations determine the first adsorbed gas quality,
Second adsorbed gas quality；
3rd determining unit, for being inhaled according to the first free gas quality, the second free gas quality, described first
Attached gaseous mass, the second adsorbed gas quality, by gaseous matter equilibrium equation in reservoir, determine the rule.
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