CN108846540A - Recovery ratio calibration method and device for tight sandstone gas field - Google Patents
Recovery ratio calibration method and device for tight sandstone gas field Download PDFInfo
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Abstract
The application provides a method and a device for calibrating recovery ratio of a tight sandstone gas field, wherein the method comprises the following steps: dividing a target tight sandstone gas field into a plurality of work areas, and dividing production wells in the target tight sandstone gas field into a plurality of well types; determining the control area of each work area, the control area ratio of various wells in each work area, the cumulative production of wells and the control area of wells; determining the limit well number of various wells in each work area according to the control area of each work area, the control area ratio of various wells in each work area and the well average control area; multiplying the accumulated well output of various wells in each work area by the limit well number to obtain the limit accumulated well output of various wells in each work area; determining the utilization reserves of various wells in each work area, and dividing the ultimate accumulated yield of various wells in each work area by the utilization reserves to obtain the ultimate recovery ratio of various wells in each work area; and determining the ultimate recovery ratio according to the ultimate recovery ratios of various wells in each work area. The method and the device can improve the accuracy of the recovery ratio calibration of the tight sandstone gas field.
Description
Technical field
This application involves natural petroleum gas field technical fields, more particularly, to a kind of recovery ratio mark of compact sandstone gas field
Determine method and device.
Background technique
The determination of gas field recovery ratio and final gas production is for instructing gas field to produce steadily in the long term, formulating development technique countermeasure
And it measures gas field development effect and is of great significance.Gas production and proved reserves are finally accumulated when recovery ratio is scrapped for gas field
Ratio.Proved reserves refer to the oil in place that calculates after the completion of drilling phase is evaluated in gas field in China, be development plan establishment,
The foundation of Productivity Construction.Large compact sandstone gas field has a very wide distribution, and reservoir heterogeneity is strong, complex geologic conditions, and exploitation is difficult
Degree is big, and there is presently no form special recovery ratio scaling method for such gas field.
Simulation or analogy method are generally tested by purging to demarcate recovery ratio in conventional gas field, and both methods is in tight sand
Application effect is all bad in gas field.Purging experiment simulation is to carry out stress under the conditions of simulating prime stratum temperature, reservoir stress
The infrastests such as sensibility, single-phase and air water two-phase, gas slip effect, analyze cumulative gas and contain in the natural of rock sample
The ratio of gas total amount (reserves), obtains ultimate recovery.It is generalized to large compact sandstone gas field formula, is had certain problems：One,
Tight gas reservoir reservoir properties are poor, complex pore structure, and laboratory is difficult to simulate the hole and venturi syntagmatic of reservoir complexity；
Two, tight gas reservoir permeability is low, and seepage flow mechanism is complicated, and classical darcy flow theory is not applicable；Three, large compact sandstone reservoir
Heterogeneity is strong, and different development blocks or even same development block internal diversity are larger, and indoor simulation analytical test sample spot
Less, the recovery ratio result obtained according to several pieces of rock samples is difficult to representative to entire gas field.Analogy method is full using needing
The stringenter condition of foot, it is desirable that analogy gas reservoir and target gas reservoir geological conditions, development scheme similarity are high.Due to Chinese Petroliferous
Hiding is mostly continental deposit, larger with external geological conditions difference, and the exploitation of domestic tight gas reservoir is started late, and rarely has tight gas
Hiding enters development late stage or close to discarding, i.e., carries out recovery ratio calibration using analogy method and lack suitable analogy gas reservoir, accuracy
It is not high.
Summary of the invention
The recovery ratio scaling method and device for being designed to provide a kind of compact sandstone gas field of the embodiment of the present application, to mention
The accuracy of high-densit sandstone gas field recovery ratio calibration.
In order to achieve the above objectives, on the one hand, the embodiment of the present application provides a kind of recovery ratio calibration of compact sandstone gas field
Method, including：
Target compact sandstone gas field is divided into multiple work areas according to reservoir geology condition and development features；
Determine the Reservoir Scale and reservoir structure in each work area；
The producing well in the target compact sandstone gas field is divided into multiple well classes based on preset evaluation index；
Determine the control area in each work area, in each work area all kinds of wells the control area when equal cumulative production of well, and
According to the Reservoir Scale in each work area and the corresponding equal control area of well for determining all kinds of wells in each work area of reservoir structure；
It is right according to the control area ratio and the equal control area of well of all kinds of wells in the control area in each work area, each work area
It should determine the limit well number of all kinds of wells in each work area；
By the equal cumulative production of well of all kinds of wells in each work area multiplied by corresponding limit well number, obtain all kinds of in each work area
The limit cumulative production of well；
Determine the mining-employed reserves of all kinds of wells in each work area, and by the limit cumulative production of all kinds of wells in each work area divided by
Corresponding mining-employed reserves, the corresponding ultimate recovery for obtaining all kinds of wells in each work area；
The ultimate recovery of the target compact sandstone gas field is determined according to the ultimate recovery of all kinds of wells in each work area.
In the recovery ratio scaling method of the compact sandstone gas field of the embodiment of the present application, the reservoir geology condition includes effective
Thickness, reserves abundance, porosity and gas saturation；The development features include that triennial well produces tolerance daily.
In the recovery ratio scaling method of the compact sandstone gas field of the embodiment of the present application, the evaluation index includes that single layer is effective
Thickness, accumulation effective thickness, open-flow capacity and initial production.
It is described according to reservoir geology condition and opening in the recovery ratio scaling method of the compact sandstone gas field of the embodiment of the present application
It sends out feature and target compact sandstone gas field is divided into multiple work areas, including：
It produces effective thickness, reserves abundance, porosity, gas saturation and triennial well daily tolerance and is standardized place
Reason obtains normalizing parameter to eliminate the influence of different dimensions；
The weight of each normalizing parameter is determined to the influence in work area according to each normalizing parameter；
According to formulaDetermine the parameter value of assessment parameter, and according to
The target compact sandstone gas field is divided into multiple work areas by the parameter value of assessment parameter；
Wherein, V is assessment parameter；Sgi、hi、Ri、PiRespectively standardize after porosity, gas saturation,
Effective thickness, reserves abundance and triennial well produce tolerance daily；A, b, c, d, e are respectivelySgi、hi、Ri、PiWeight, a, b,
C, d, e are positive number and a+b+c+d+e=1.
In the recovery ratio scaling method of the compact sandstone gas field of the embodiment of the present application, the control plane in each work area of determination
The control area ratio of all kinds of wells in long-pending, each work area, including：
Determine the master control sedimentary facies belt in each work area；
It is constraint, the corresponding control area for determining each work area and each work area with the master control sedimentary facies belt in each work area
The control area ratio of interior all kinds of wells.
In the recovery ratio scaling method of the compact sandstone gas field of the embodiment of the present application, all kinds of wells in each work area of determination
The equal cumulative production of well, including：
Determine that the well of all kinds of wells in each work area dynamically stores up using production capacity shakiness setting analysis and production curve integration method
Amount, and combine the equal cumulative production of well of all kinds of wells in the discarded each work area of conditional forecasting of preset Well Development.
It is described to be advised according to the reservoir in each work area in the recovery ratio scaling method of the compact sandstone gas field of the embodiment of the present application
Mould and the corresponding equal control area of well for determining all kinds of wells in each work area of reservoir structure, including：
According to the Reservoir Scale and reservoir structure in each work area, the corresponding net sandstone for determining all kinds of wells in each work area is flat
The value range of face overlapping area；
Determine the discouraged area average of the individual well of all kinds of wells in each work area；
When the individual well of wells all kinds of in each work area loses heart, area average is corresponding to be located at the effective of all kinds of wells in each work area
When sand body plane is overlapped in the value range of area, the individual well of all kinds of wells in each work area is lost heart, and area average is corresponding to be determined
For the equal control area of well of all kinds of wells in each work area.
In the recovery ratio scaling method of the compact sandstone gas field of the embodiment of the present application, the control plane according to each work area
The control area ratio and the equal control area of well of all kinds of wells in long-pending, each work area, the corresponding limit for determining all kinds of wells in each work area
Well number, including：
It is corresponding to obtain each by the control area in each work area respectively multiplied by the control area ratio of all kinds of wells in each work area
The control area of all kinds of wells in work area；
It is right by the corresponding equal control area of well divided by all kinds of wells in each work area of the control area of all kinds of wells in each work area
The limit well number of all kinds of wells in each work area should be obtained.
It is described according to all kinds of wells in each work area in the recovery ratio scaling method of the compact sandstone gas field of the embodiment of the present application
Ultimate recovery determine the ultimate recovery of the target compact sandstone gas field, including：
The ultimate recovery of all kinds of wells in each work area is weighted and averaged, the target compact sandstone gas field is obtained
Ultimate recovery.
On the other hand, the embodiment of the present application also provides a kind of recovery ratio caliberating devices of compact sandstone gas field, including：
Target gas field division module, for being divided into target compact sandstone gas field according to reservoir geology condition and development features
Multiple work areas；
Reservoir characteristic determining module, for determining the Reservoir Scale and reservoir structure in each work area；
Producing well categorization module, for based on preset evaluation index by the producing well in the target compact sandstone gas field
It is divided into multiple well classes；
Control parameter determining module, for determining the control area in each work area, in each work area all kinds of wells control plane
The long-pending when equal cumulative production of well, and all kinds of wells in each work area are determined according to the Reservoir Scale in each work area and reservoir structure are corresponding
The equal control area of well；
Limit well number determining module, for the control plane according to all kinds of wells in the control area in each work area, each work area
Product than and the equal control area of well, the corresponding limit well number for determining all kinds of wells in each work area；
Cumulative production determining module, for by the equal cumulative production of well of all kinds of wells in each work area multiplied by corresponding limit well
Number, obtains the limit cumulative production of all kinds of wells in each work area；
Classification recovery ratio determining module, for determining the mining-employed reserves of all kinds of wells in each work area, and will be in each work area
The limit cumulative production of all kinds of wells is divided by corresponding mining-employed reserves, the corresponding ultimate recovery for obtaining all kinds of wells in each work area；
Overall recovery ratio determining module, for determining that the target causes according to the ultimate recovery of all kinds of wells in each work area
The ultimate recovery in close sandstone gas field.
On the other hand, the embodiment of the present application also provides the recovery ratio caliberating devices of another compact sandstone gas field, including
Memory, processor and the computer program being stored on the memory, the computer program are transported by the processor
Following steps are executed when row：
Target compact sandstone gas field is divided into multiple work areas according to reservoir geology condition and development features；
Determine the Reservoir Scale and reservoir structure in each work area；
The producing well in the target compact sandstone gas field is divided into multiple well classes based on preset evaluation index；
Determine the control area in each work area, in each work area all kinds of wells the control area when equal cumulative production of well, and
According to the Reservoir Scale in each work area and the corresponding equal control area of well for determining all kinds of wells in each work area of reservoir structure；
It is right according to the control area ratio and the equal control area of well of all kinds of wells in the control area in each work area, each work area
It should determine the limit well number of all kinds of wells in each work area；
By the equal cumulative production of well of all kinds of wells in each work area multiplied by corresponding limit well number, obtain all kinds of in each work area
The limit cumulative production of well；
Determine the mining-employed reserves of all kinds of wells in each work area, and by the limit cumulative production of all kinds of wells in each work area divided by
Corresponding mining-employed reserves, the corresponding ultimate recovery for obtaining all kinds of wells in each work area；
The ultimate recovery of the target compact sandstone gas field is determined according to the ultimate recovery of all kinds of wells in each work area.
As can be seen from the technical scheme provided by the above embodiments of the present application, large compact sandstone gas is utilized in the embodiment of the present application
The true and reliable geology and dynamic data of magnanimity in the exploitation of field, using producing well as point of penetration, using producing well Taxonomic discussion and
The strategy of typical block dissection, rationally splits and has separated multiple work areas and marked off multiple producing well types, for typical block
The limit cumulative production of all kinds of wells in each work area is predicted, then by the limit cumulative production of all kinds of wells in each work area divided by right
The mining-employed reserves answered, the corresponding ultimate recovery for obtaining all kinds of wells in each work area, finally according to all kinds of wells in each work area
Ultimate recovery determines the ultimate recovery of target compact sandstone gas field.Therefore, it is based on technical side provided by the embodiments of the present application
Case can calibrate more accurate compact sandstone gas field recovery ratio, so as to formulate development technique countermeasure, safeguarding that gas field is long-term
It plays a positive role in steady production.
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.In the accompanying drawings：
Fig. 1 is the flow chart of the recovery ratio scaling method of compact sandstone gas field in one embodiment of the application；
Fig. 2 a is that the sandy ground in certain work area in one embodiment of the application compares flat distribution map；
Fig. 2 b is the wellblock flat distribution map of all kinds of wells in certain work area in one embodiment of the application；
Fig. 3 is the structural block diagram of the recovery ratio caliberating device of compact sandstone gas field in one embodiment of the application；
Fig. 4 is the structural block diagram of the recovery ratio caliberating device of compact sandstone gas field in another embodiment of the application.
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 creative efforts
Range.Such as in being described below, second component is formed above the first component, may include the first component and second component
It can also include the first component and second component in a manner of non-direct contact (i.e. the with the embodiment that the direct way of contact is formed
Can also include additional component between one component and second component) embodiment etc. that is formed.
Moreover, for ease of description, some embodiments of the application can be used such as " in ... top ", " ... under ",
The spatially relative terms such as " top ", " lower section ", with description such as each element shown in the drawings of embodiment or component and another
Relationship between (or other) element or component.It should be understood that space is opposite other than the orientation described in the attached drawing
Term also aims to the different direction including device in use or operation.If such as the device in attached drawing is reversed, and is described
For the element or component of " " other elements or component " below " or " under ", it will then be positioned as " " other elements or portion
Part " top " or " on ".
For large compact sandstone gas field, at present using proved reserves as be primarily present in recovery factor calculation formula two aspect
The problem of：First is that exploration phase well spacing is big, data is few, precision is low, the reservoir parameter of acquisition is not accurate enough, is obtained according to volumetric method
Oil in place reliability it is not strong.Although as going deep into for development process, more accurate gas field reserves parameter can be obtained, but
Under the current reserves management mode in China, proved reserves are seldom changed or are checked and write off once submitting；Second is that unbonded Production development,
The recovery ratio of calculating can not often reflect the exploitation rule of gas reservoir, to be unfavorable for the across comparison of different type gas reservoir.It causes
Close gas reservoir percolation ability is weak, and the unsteered region reserves of well pattern are difficult to employ.Accordingly it is contemplated that replacing harvesting using mining-employed reserves
Proved reserves in rate calculation formula.Mining-employed reserves, which refer to, carries out Productivity Construction, technology well pattern overlay area according to development plan
The part reserves of interior Commercial cultivation.Relatively regular well pattern is difficult to exactly match with irregular reservoir distribution, will cause certain
The area consumption of degree makes part proved reserves be difficult to employ；And in the process of development, continuous to the understanding of reservoir heterogeneity
The reservoir parameter accuracy of in-depth, acquisition is continuously improved, so that being often less than spy using the mining-employed reserves that producing pattern calculates
Bright reserves.In view of tight gas reservoir well yield is low, Size Portfolio exploitation in gas field relies on a large amount of well spacing, can be according to these producing wells
It can get geology abundant and development behavior data, can accurately be portrayed by these truthful datas using suitable method
Gas reservoir demarcates recovery ratio.
Therefore, using the magnanimity geology and dynamic data in large compact sandstone gas field development, using producing well as point of penetration,
The strategy dissected using Taxonomic discussion and emphasis is rationally split a point development block, divides producing well type, for typical Block predictions
Final accumulative gas production of all kinds of wellblocks in the case where well pattern interference without generation close enough, comprehensive each block are accurately marked
Gas field ultimate recovery is determined, so as to formulate development technique countermeasure, safeguarding that gas field is played a positive role in producing steadily in the long term.
Refering to what is shown in Fig. 1, being based on above-mentioned theory, the recovery ratio scaling method of the compact sandstone gas field of the embodiment of the present application can
To include the following steps：
S101, target compact sandstone gas field is divided by multiple work areas according to reservoir geology condition and development features.
Large compact sandstone gas field has a very wide distribution, and reservoir heterogeneity is strong, and there are apparent differences between development block.
Therefore, in one embodiment of the application, target compact sandstone gas field can be divided into according to reservoir geology condition and development features
Multiple work areas.Wherein, reservoir geology condition for example may include effective thickness, reserves abundance, porosity and gas saturation etc.；
Development features may include such as triennial well produces tolerance daily.It is described according to reservoir geology in one embodiment of the application
Target compact sandstone gas field is divided into multiple work areas by condition and development features may comprise steps of：
1), effective thickness, reserves abundance, porosity, gas saturation and triennial well are produced daily tolerance and carries out standard
Change processing obtains normalizing parameter to eliminate the influence of different dimensions；
2) weight of each normalizing parameter, is determined to the influence in work area according to each normalizing parameter；
3), according to formulaDetermine the parameter value of assessment parameter, and root
The target compact sandstone gas field is divided into multiple work areas according to the parameter value of assessment parameter；
Wherein, V is assessment parameter；Sgi、hi、Ri、PiRespectively standardize after porosity, gas saturation,
Effective thickness, reserves abundance and triennial well produce tolerance daily；A, b, c, d, e are respectivelySgi、hi、Ri、PiWeight, a, b,
C, d, e are positive number and a+b+c+d+e=1.
In one exemplary embodiment, by taking Su Lige large compact sandstone gas field as an example：
(1) standardization is done to this 5 parameters first, eliminates the influence of different dimensions
The reservoir porosity in Su Lige large compact sandstone gas field is mainly distributed on 5~15%, and gas saturation is mainly divided
For cloth 40~80%, effective thickness is mainly distributed on 6~20m, and reserves abundance is mainly distributed on (0.9~2.5) × 108m3/km2,
Triennial daily gas is mainly distributed on (0.5~3.0) × 104m3/d.Then have：
Wherein,Sg, h, R, P be respectively original porosity, gas saturation, effective thickness, reserves abundance and 3 years
Phase well produces tolerance daily.
(2) influence according to each parameter to subregion defines their weight respectively
Rule of thumb, it is fitted correlation formula, to porosity, gas saturation, effective thickness, reserves abundance and triennial day
The weight for producing gas takes 0.1,0.1,0.2,0.15 and 0.45 respectively.The sum of weight of this 5 parameters is 1.
(3) according to assessment parameter V, subregion is carried out to gas field
According to V value>0.3,0.2~0.3,0.12~0.2 and<0.12, gas field is divided into four areas Ge great, respectively corresponds Soviet Union
In, Soviet Union and Eastern Europe, Susie and southern Jiangsu, as shown in table 1 below, so that conducting a research for subsequent partitions provides foundation.
The Soviet Union of the table 1 major Division table of Sulige gas field
S102, the Reservoir Scale and reservoir structure for determining each work area.
In the embodiment of the present application, in general, each work area brought in well number may be still more, data is many and diverse, it is difficult to complete
Portion's application.Accordingly it is contemplated that the typical block that can preferably represent this work area from each work area carries out reservoir fine dissection, with true
Its fixed Reservoir Scale and reservoir structure, the geological conditions to clear work area.
In one exemplary embodiment, for example, the area Su Zhong be revive Sulige gas field exploitation important component, area
6300km2, average 1.5 hundred million sides of reserves abundance/km2, 4207 mouthfuls of brought in well, 10,000,000,000 sides of production capacity/year, brought in well number and production capacity account for
40% or more of the total brought in well number in gas field and aggregated capacity.Area includes 10 development blocks in Su Lige, therefrom 14 blocks of preferred Soviet Union
As research area：1. studying the big (850km of area's area2), reservoir conditions are preferable, and Reservoir Scale, reservoir properties, reserves abundance are to gas
Tanaka area is representative；It is one of several blocks that Soviet Union's Sulige gas field is gone into operation earliest, when gas well is developed 2. block 2006 go into operation
Between it is long, dynamic data is relatively reliable；3. dynamic and static data is complete in area, altogether 646 mouthfuls of brought in well number, carry out 6 wellblocks of encryption test,
It is suitble to carry out comprehensive study.
S103, the producing well in the target compact sandstone gas field is divided by multiple well classes based on preset evaluation index.
It, can be with single layer effective thickness, accumulation effective thickness, open-flow capacity and initial production etc. in one embodiment of the application
Parameter establishes producing well classification standard as evaluation index, and according to the superiority and inferiority of development effectiveness.
In one exemplary embodiment, it is based on above-mentioned classification method, the producing well for Sulige gas field of reviving can be divided three classes well,
As shown in table 2 below：
The Soviet Union of table 2 Sulige gas field three classes well divides evaluation criterion
In table 2, I class well：Thickness in monolayer>5, cumulative thickness>10, open-flow capacity>10, initial production>1.5, exploitation effect
Fruit is best；II class well：Thickness in monolayer is 3~5, and certain Reservoir Scale is formed after multiple superposed, and cumulative thickness is 6~10, nothing
Choked flow amount is 4~10, and initial production is 0.8~1.5, and development effectiveness is preferable；Group III well：Thickness in monolayer<3, net sandstone number
It is few, cumulative thickness<6, open-flow capacity<4, initial production<0.8, development effectiveness is poor.Due to the classification standard consider parameter compared with
It is more, so that improving it differentiates accuracy rate, it can be in exploitation early stage for judging the well type of producing well rapidly.
S104, the control area for determining each work area, when well is accumulative produces for the control areas of all kinds of wells in each work area
Amount, and according to the Reservoir Scale in each work area and the corresponding equal control area of well for determining all kinds of wells in each work area of reservoir structure.
In one embodiment of the application, the control of all kinds of wells in the control area in each work area of determination, each work area
Area ratio such as can be the master control sedimentary facies belt for first determining each work area；It then is about with the master control sedimentary facies belt in each work area
Beam corresponds to the control area ratio of all kinds of wells in the control area for determining each work area and each work area.
Tradition is phased to generally refer to sedimentary micro.Net sandstone is distributed with certain control action in sedimentary micro, has
The coarse sands lithofacies such as effect sand body and channel bar bottom, river filling bottom have preferable corresponding relationship, however sedimentary micro has in space
Have a very strong inhomogeneity, different layers position, different wellblocks sedimentary micro growth category, development frequency and development scale difference compared with
Greatly, it is difficult to predict needing to find the Dominated Factors that net sandstone is distributed from more macroscopical scale, (i.e. master control deposits distribution characteristics
Phase).In the case where constructing extremely wide slow tectonic setting, earth history period more phase rivers are stacked, form huge braided stream body
System.Braided stream system is km grade in the plane, may include 2~3 exploitation substratums for sand group grade stratum on vertical.Root
According to material resource, hydrodynamic force, holding space, palaeogeomorphic evolution Feature, braided stream system can be divided into superimposed band, intermediate zone and system
Between three zone.Between superimposed band-intermediate zone-system, depositional hydrodynamic force is by by force to weak, reservoir geology condition is by good to poor.
Studies have shown that braided stream system band is for sedimentary micro growth category, frequency and rule for terrestrial facies braided stream deposit
Mould has stronger control action, is the main controlling geological factors for determining net sandstone distribution, gas well deliverability.Such as in an exemplary reality
It applies in example, superimposed band hydrodynamic force is strong, sandy ground ratio>0.5, channel bar develops ratio height (average 58%), is enriched 70% or more gas field
Net sandstone, net sandstone scale is relatively large；Intermediate zone is in superimposed band edge, and water energy weakens, sandy ground than 0.3~
0.5, major developmental river fill microfacies (ratio is up to 72%), channel bar develop ratio be only 28%, comprising about 25% it is effective
Sand body, net sandstone scale are reduced, and continuity is poor.Hydrodynamic force is weak between system, sandy ground ratio<0.3, with aleuritic texture, shale
Based on equal fine-grained sediments, the basic agensis of net sandstone.Therefore, each work can be determined using braided stream system band as phase belt restraining
The control area ratio of all kinds of wells in the control area in area and each work area.In one exemplary embodiment, it is based on the above method,
Can obtain Soviet Union Sulige gas field work area sandy ground than flat distribution map (as shown in Figure 2 a) and wellblock flat distribution map (such as Fig. 2 b institute
Show), and then the control area ratio of all kinds of wells in the control area and each work area in each work area can be determined based on this.
In one embodiment of the application, the equal cumulative production of well of all kinds of wells for example can be benefit in each work area of determination
The equal dynamic holdup of well of all kinds of wells in each work area is determined with production capacity shakiness setting analysis and production curve integration method, and is combined pre-
If Well Development discard each work area of conditional forecasting in all kinds of wells the equal cumulative production of well.
In one exemplary embodiment, for example, can choose the production time it is longer (>500d), reach or basically reach quasi-stable state
A large amount of wells as analysis sample, the well for the methods of integrating all kinds of wells of evaluation using production capacity shakiness setting analysis and production curve is dynamic
State reserves discard condition then in conjunction with Well Development, predict the equal cumulative production of the well of all kinds of wells.In general, fluid is from reservoir stream
Two stages can be undergone to pit shaft, that is, the flow instabilities section at the initial stage that drives a well and the boundary flow sections in later period.Pass through non-stationary flow
The fitting of dynamic section can calculate skin factor, reservoir permeability, fracture length of gas well etc., and being fitted by boundary flow sections can be with
Calculate Estimation of Gas Well Dynamic Reserves.To guarantee the accurate and reliable of calculated result, the gas well for participating in calculating to every mouthful has carried out the quality of data
Control can carry out investigation processing to abnormal point, while extract effective storage that perforation layer is linked up for each well in parameter selection
Thickness degree, and based on the effective reservoir thickness, after obtaining porosity and reservoir fracturing improvement by average weighted mode
The physical datas such as permeability.In conjunction with Well Development discard condition (such as well head pressure be less than 3Mpa, daily gas<1000 sides/day
Deng), predict the equal cumulative production of the well of all kinds of wells in each work area.
It is described to determine each work according to the Reservoir Scale and reservoir structure in each work area are corresponding in one embodiment of the application
The equal control area of the well of all kinds of wells may comprise steps of in area：
1), according to the Reservoir Scale and reservoir structure in each work area, the corresponding effective sand for determining all kinds of wells in each work area
The value range of body plane overlapping area；
2) the discouraged area average of the individual well of all kinds of wells in each work area, is determined；
3), when the individual well of wells all kinds of in each work area loses heart, area average is corresponding to be located at having for all kinds of wells in each work area
It is when imitating in the value range of sand body plane overlapping area, the discouraged area average of the individual well of all kinds of wells in each work area is corresponding true
It is set to the equal control area of well of all kinds of wells in each work area.
It in one exemplary embodiment, can be according to dense well pattern solution by taking certain class producing well in Sulige gas field work area of reviving as an example
It cuts open, interference test analysis, and combines the data such as effective single sand body thickness and width-thickness ratio, length-width ratio, it is understood that effective single sand body is wide
Degree is mainly distributed within the scope of 100~500m, average out to 310m；Effective single sand body length is mainly distributed on 300~700m, average
For 520m.And single sand body average area 0.16km2, individual well bore multiple net sandstones for meeting plane overlap below product 0.18~
0.23km2In range.In view of parameters such as man-made fracture half length, reservoir properties, according to a large amount of producing well dynamic data, understanding
Lose heart to gas well and is limited in scope, 63% well drainage area<0.24km2, 24% well is in 0.24-0.48km2, only 13% well>
0.48km2, average out to 0.20km2.Due to 0.20km2Positioned at 0.18~0.23km2It, therefore, can be by 0.20km in range2As this
The equal control area of well of the work area well class.
S105, according to the control area ratio and the equal control plane of well of all kinds of wells in the control area in each work area, each work area
Product, the corresponding limit well number for determining all kinds of wells in each work area.
In one embodiment of the application, the control area according to each work area, in each work area all kinds of wells control
Area ratio and the equal control area of well, the corresponding limit well number for determining all kinds of wells in each work area may include：
1) corresponding to obtain, by the control area in each work area respectively multiplied by the control area ratio of all kinds of wells in each work area
The control area of all kinds of wells in each work area；
2), by the corresponding equal control plane of well divided by all kinds of wells in each work area of the control area of all kinds of wells in each work area
Product, the corresponding limit well number for obtaining all kinds of wells in each work area.
S106, by the equal cumulative production of well of all kinds of wells in each work area multiplied by corresponding limit well number, obtain each work area
The limit cumulative production of interior all kinds of wells.
S1017, the mining-employed reserves for determining all kinds of wells in each work area, and the limit of all kinds of wells in each work area is added up to produce
Amount is divided by corresponding mining-employed reserves, the corresponding ultimate recovery for obtaining all kinds of wells in each work area.
In one exemplary embodiment, by taking 14 work area of Sulige gas field of reviving as an example, from reservoir geology scale and the discouraged model of dynamic
From the aspect of enclosing two, the equal control area of three classes Jing Jing can be obtained and distinguish 0.29,0.22 and 0.14km2, i.e. three classes well do not occurring
Corresponding maximum well spacing density is 3.4,4.5 and 7.1 mouthfuls when interference.When the well pattern thickening of three classes wellblock to it is close enough when, predict
Mining-employed reserves are respectively 286.1,653.6,286.7 hundred million sides, add up 1226.4 hundred million sides, account for the 95.2% of proved reserves.Three classes well
The average cumulative yield in area is respectively 249.4,514.4,198.9 hundred million sides, adds up 962.7 hundred million sides.To I, II, Group III wellblock
Ultimate recovery is respectively 87.2%, 78.7%, 69.4%, and the ultimate recovery in entire work area is 78.5%, such as the following table 3 institute
Show.
14 block recovery factor calculation tables of the Soviet Union of table 3
S108, determine that the limit of the target compact sandstone gas field is adopted according to the ultimate recovery of all kinds of wells in each work area
Yield.
In one exemplary embodiment, by taking Sulige gas field of reviving as an example, the ratio of each work area three classes well, development features evaluation,
Control range difference, causes their ultimate recovery to be had nothing in common with each other.Middle area's reservoir conditions are best, proved reserves reliability
It is most strong, can development degree it is high, development effectiveness is good, I+II class well ratio>70%, ultimate recovery 78.5%.West large area contains
Water causes large-scale reserves to be difficult to employ, but reservoir properties itself is not poor, therefore proved reserves recovery ratio is relatively low, is
26.8%, mining-employed reserves recovery ratio is only second to middle area, is 76.6%.East is relatively compact, and physical property is poor, I+II class well ratio
62.1%, can dynamic reserve ultimate recovery be 73.8%.South is most fine and close, and development effectiveness is poor, and I+II class well ratio is insufficient
40%, can dynamic reserve ultimate recovery be 71.2%, as shown in table 4 below.
The Soviet Union of table 4 each block recovery ratio of league (unit of length)
The ultimate recovery of all kinds of wells in above-mentioned each work area is weighted and averaged, Soviet Union's Sulige gas field can be finally obtained
Mining-employed reserves ultimate recovery is 75.3%.
Refering to what is shown in Fig. 3, a kind of recovery ratio caliberating device of compact sandstone gas field of the embodiment of the present application may include：
Target gas field division module 31 can be used for target compact sandstone gas according to reservoir geology condition and development features
Field is divided into multiple work areas；
Reservoir characteristic determining module 32 is determined for the Reservoir Scale and reservoir structure in each work area；
Producing well categorization module 33, can be used for will be in the target compact sandstone gas field based on preset evaluation index
Producing well is divided into multiple well classes；
Control parameter determining module 34 is determined for the control area in each work area, all kinds of wells in each work area
The control area when equal cumulative production of well, and determined in each work area according to the Reservoir Scale in each work area and reservoir structure are corresponding
The equal control area of the well of all kinds of wells；
Limit well number determining module 35 can be used for the control area according to each work area, all kinds of wells in each work area
Control area ratio and the equal control area of well, the corresponding limit well number for determining all kinds of wells in each work area；
Cumulative production determining module 36 can be used for the equal cumulative production of well by wells all kinds of in each work area multiplied by corresponding
Limit well number obtains the limit cumulative production of all kinds of wells in each work area；
Classification recovery ratio determining module 37, is determined for the mining-employed reserves of all kinds of wells in each work area, and will be each
The limit cumulative production of all kinds of wells is adopted divided by corresponding mining-employed reserves, the corresponding limit for obtaining all kinds of wells in each work area in work area
Yield；
Overall recovery ratio determining module 38 can be used for according to the determination of the ultimate recovery of wells all kinds of in each work area
The ultimate recovery of target compact sandstone gas field.
Refering to what is shown in Fig. 4, the recovery ratio caliberating device of another compact sandstone gas field of the embodiment of the present application may include
Memory, processor and the computer program being stored on the memory, the computer program are transported by the processor
Following steps are executed when row：
Target compact sandstone gas field is divided into multiple work areas according to reservoir geology condition and development features；
Determine the Reservoir Scale and reservoir structure in each work area；
The producing well in the target compact sandstone gas field is divided into multiple well classes based on preset evaluation index；
Determine the control area in each work area, in each work area all kinds of wells the control area when equal cumulative production of well, and
According to the Reservoir Scale in each work area and the corresponding equal control area of well for determining all kinds of wells in each work area of reservoir structure；
It is right according to the control area ratio and the equal control area of well of all kinds of wells in the control area in each work area, each work area
It should determine the limit well number of all kinds of wells in each work area；
By the equal cumulative production of well of all kinds of wells in each work area multiplied by corresponding limit well number, obtain all kinds of in each work area
The limit cumulative production of well；
Determine the mining-employed reserves of all kinds of wells in each work area, and by the limit cumulative production of all kinds of wells in each work area divided by
Corresponding mining-employed reserves, the corresponding ultimate recovery for obtaining all kinds of wells in each work area；
The ultimate recovery of the target compact sandstone gas field is determined according to the ultimate recovery of all kinds of wells in each work area.
Although procedures described above process includes the multiple operations occurred with particular order, it should however be appreciated that understanding, these processes
May include more or fewer operations, these operations can sequentially execute or execute parallel (such as using parallel processor or
Multi-thread environment).
For convenience of description, it is divided into various units when description apparatus above with function to describe respectively.Certainly, implementing this
The function of each unit can be realized in the same or multiple software and or hardware when application.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
In a typical configuration, calculating equipment includes one or more processors (CPU), input/output interface, net
Network interface and memory.
Memory may include the non-volatile memory in computer-readable medium, random access memory (RAM) and/or
The forms such as Nonvolatile memory, such as read-only memory (ROM) or flash memory (flash RAM).Memory is computer-readable medium
Example.
Computer-readable medium includes permanent and non-permanent, removable and non-removable media can be by any method
Or technology come realize information store.Information can be computer readable instructions, data structure, the module of program or other data.
The example of the storage medium of computer includes, but are not limited to phase change memory (PRAM), static random access memory (SRAM), moves
State random access memory (DRAM), other kinds of random access memory (RAM), read-only memory (ROM), electric erasable
Programmable read only memory (EEPROM), flash memory or other memory techniques, read-only disc read only memory (CD-ROM) (CD-ROM),
Digital versatile disc (DVD) or other optical storage, magnetic cassettes, tape magnetic disk storage or other magnetic storage devices
Or any other non-transmission medium, can be used for storage can be accessed by a computing device information.As defined in this article, it calculates
Machine readable medium does not include temporary computer readable media (transitory media), such as the data-signal and carrier wave of modulation.
It should also be noted that, the terms "include", "comprise" or its any other variant are intended to nonexcludability
Include, so that process, method or equipment including a series of elements not only include those elements, but also including not having
There is the other element being expressly recited, or further includes for this process, method or the intrinsic element of equipment.Do not having more
In the case where more limitations, the element that is limited by sentence "including a ...", it is not excluded that including process, the side of the element
There is also other identical elements in method or equipment.
It will be understood by those skilled in the art that embodiments herein can provide as method, system or computer program product.
Therefore, complete hardware embodiment, complete software embodiment or embodiment combining software and hardware aspects can be used in the application
Form.It is deposited moreover, the application can be used to can be used in the computer that one or more wherein includes computer usable program code
The shape for the computer program product implemented on storage media (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.)
Formula.
The application can describe in the general context of computer-executable instructions executed by a computer, such as program
Module.Generally, program module includes routines performing specific tasks or implementing specific abstract data types, programs, objects, group
Part, data structure etc..The application can also be practiced in a distributed computing environment, in these distributed computing environments, by
Task is executed by the connected remote processing devices of communication network.In a distributed computing environment, program module can be with
In the local and remote computer storage media including storage equipment.
All the embodiments in this specification are described in a progressive manner, same and similar portion between each embodiment
Dividing may refer to each other, and each embodiment focuses on the differences from other embodiments.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.
The above description is only an example of the present application, is not intended to limit this application.For those skilled in the art
For, various changes and changes are possible in this application.All any modifications made within the spirit and principles of the present application are equal
Replacement, improvement etc., should be included within the scope of the claims of this application.
Claims (11)
1. a kind of recovery ratio scaling method of compact sandstone gas field, which is characterized in that including：
Target compact sandstone gas field is divided into multiple work areas according to reservoir geology condition and development features；
Determine the Reservoir Scale and reservoir structure in each work area；
The producing well in the target compact sandstone gas field is divided into multiple well classes based on preset evaluation index；
Determine the control area in each work area, in each work area all kinds of wells the control area when equal cumulative production of well, and according to
The corresponding equal control area of well for determining all kinds of wells in each work area of the Reservoir Scale and reservoir structure in each work area；
It is corresponding true according to the control area ratio and the equal control area of well of all kinds of wells in the control area in each work area, each work area
The limit well number of all kinds of wells in fixed each work area；
By the equal cumulative production of well of all kinds of wells in each work area multiplied by corresponding limit well number, all kinds of wells in each work area are obtained
Limit cumulative production；
Determine the mining-employed reserves of all kinds of wells in each work area, and by the limit cumulative production of all kinds of wells in each work area divided by correspondence
Mining-employed reserves, the corresponding ultimate recovery for obtaining all kinds of wells in each work area；
The ultimate recovery of the target compact sandstone gas field is determined according to the ultimate recovery of all kinds of wells in each work area.
2. the recovery ratio scaling method of compact sandstone gas field as described in claim 1, which is characterized in that the reservoir geology item
Part includes effective thickness, reserves abundance, porosity and gas saturation；The development features include the equal daily gas of triennial well
Amount.
3. the recovery ratio scaling method of compact sandstone gas field as described in claim 1, which is characterized in that the evaluation index packet
Include single layer effective thickness, accumulation effective thickness, open-flow capacity and initial production.
4. the recovery ratio scaling method of compact sandstone gas field as claimed in claim 2, which is characterized in that it is described according to reservoir
Target compact sandstone gas field is divided into multiple work areas by matter condition and development features, including：
Effective thickness, reserves abundance, porosity, gas saturation and triennial well is produced daily tolerance to be standardized,
Normalizing parameter is obtained to eliminate the influence of different dimensions；
The weight of each normalizing parameter is determined to the influence in work area according to each normalizing parameter；
According to formulaDetermine the parameter value of assessment parameter, and according to synthesis
The target compact sandstone gas field is divided into multiple work areas by the parameter value of evaluation parameter；
Wherein, V is assessment parameter；Sgi、hi、Ri、PiPorosity, gas saturation, effective thickness after respectively standardizing
Degree, reserves abundance and triennial well produce tolerance daily；A, b, c, d, e are respectivelySgi、hi、Ri、PiWeight, a, b, c, d, e
It is positive number and a+b+c+d+e=1.
5. the recovery ratio scaling method of compact sandstone gas field as described in claim 1, which is characterized in that each work of determination
The control area ratio of all kinds of wells in the control area in area, each work area, including：
Determine the master control sedimentary facies belt in each work area；
It is constraint with the master control sedimentary facies belt in each work area, it is each in the control area in corresponding determining each work area and each work area
The control area ratio of class well.
6. the recovery ratio scaling method of compact sandstone gas field as described in claim 1, which is characterized in that each work of determination
The equal cumulative production of the well of all kinds of wells in area, including：
The equal dynamic holdup of well of all kinds of wells in each work area is determined using production capacity shakiness setting analysis and production curve integration method, and
The equal cumulative production of well of all kinds of wells in each work area of conditional forecasting is discarded in conjunction with preset Well Development.
7. the recovery ratio scaling method of compact sandstone gas field as described in claim 1, which is characterized in that described according to each work
The corresponding equal control area of well for determining all kinds of wells in each work area of the Reservoir Scale and reservoir structure in area, including：
According to the Reservoir Scale and reservoir structure in each work area, the corresponding net sandstone plane for determining all kinds of wells in each work area is folded
Close the value range of area；
Determine the discouraged area average of the individual well of all kinds of wells in each work area；
When the corresponding net sandstone for being located at all kinds of wells in each work area of the discouraged area average of the individual well of wells all kinds of in each work area
When plane is overlapped in the value range of area, the individual well of all kinds of wells in each work area is lost heart, and area average is corresponding to be determined as often
The equal control area of the well of all kinds of wells in a work area.
8. the recovery ratio scaling method of compact sandstone gas field as described in claim 1, which is characterized in that described according to each work
The control area ratio and the equal control area of well of all kinds of wells in the control area in area, each work area, it is corresponding to determine in each work area respectively
The limit well number of class well, including：
It is corresponding to obtain each work area by the control area in each work area respectively multiplied by the control area ratio of all kinds of wells in each work area
The control area of interior all kinds of wells；
By the corresponding equal control area of well divided by all kinds of wells in each work area of the control area of all kinds of wells in each work area, correspondence is obtained
Obtain the limit well number of all kinds of wells in each work area.
9. the recovery ratio scaling method of compact sandstone gas field as described in claim 1, which is characterized in that described according to each work
The ultimate recovery of all kinds of wells determines the ultimate recovery of the target compact sandstone gas field in area, including：
The ultimate recovery of all kinds of wells in each work area is weighted and averaged, the limit of the target compact sandstone gas field is obtained
Recovery ratio.
10. a kind of recovery ratio caliberating device of compact sandstone gas field, which is characterized in that including：
Target gas field division module, it is multiple for being divided into target compact sandstone gas field according to reservoir geology condition and development features
Work area；
Reservoir characteristic determining module, for determining the Reservoir Scale and reservoir structure in each work area；
Producing well categorization module, for being divided into the producing well in the target compact sandstone gas field based on preset evaluation index
Multiple well classes；
Control parameter determining module, for determining the control area in each work area, in each work area all kinds of wells control area ratio
And the equal cumulative production of well, and according to the Reservoir Scale in each work area and the corresponding well for determining all kinds of wells in each work area of reservoir structure
Equal control area；
Limit well number determining module, for the control area ratio according to all kinds of wells in the control area in each work area, each work area
With the equal control area of well, the corresponding limit well number for determining all kinds of wells in each work area；
Cumulative production determining module, for by the equal cumulative production of well of all kinds of wells in each work area multiplied by corresponding limit well number,
Obtain the limit cumulative production of all kinds of wells in each work area；
Classification recovery ratio determining module, for determining the mining-employed reserves of all kinds of wells in each work area, and will be all kinds of in each work area
The limit cumulative production of well is divided by corresponding mining-employed reserves, the corresponding ultimate recovery for obtaining all kinds of wells in each work area；
Overall recovery ratio determining module, for determining the target densification sand according to the ultimate recovery of all kinds of wells in each work area
The ultimate recovery in rock gas field.
11. a kind of recovery ratio caliberating device of compact sandstone gas field, including memory, processor and it is stored in the storage
Computer program on device, which is characterized in that the computer program executes following steps when being run by the processor：
Target compact sandstone gas field is divided into multiple work areas according to reservoir geology condition and development features；
Determine the Reservoir Scale and reservoir structure in each work area；
The producing well in the target compact sandstone gas field is divided into multiple well classes based on preset evaluation index；
Determine the control area in each work area, in each work area all kinds of wells the control area when equal cumulative production of well, and according to
The corresponding equal control area of well for determining all kinds of wells in each work area of the Reservoir Scale and reservoir structure in each work area；
It is corresponding true according to the control area ratio and the equal control area of well of all kinds of wells in the control area in each work area, each work area
The limit well number of all kinds of wells in fixed each work area；
By the equal cumulative production of well of all kinds of wells in each work area multiplied by corresponding limit well number, all kinds of wells in each work area are obtained
Limit cumulative production；
Determine the mining-employed reserves of all kinds of wells in each work area, and by the limit cumulative production of all kinds of wells in each work area divided by correspondence
Mining-employed reserves, the corresponding ultimate recovery for obtaining all kinds of wells in each work area；
The ultimate recovery of the target compact sandstone gas field is determined according to the ultimate recovery of all kinds of wells in each work area.
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| CN109655934A (en) * | 2018-11-28 | 2019-04-19 | 郭建林 | Tight gas reservoir gas-bearing area measuring method based on gas-bearing formation Drilling ratio |
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| CN113761743A (en) * | 2021-09-07 | 2021-12-07 | 中国地质大学（北京） | Method and device for calculating regional shale gas reserves, terminal equipment and storage medium |
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| CN115898365A (en) * | 2021-08-30 | 2023-04-04 | 中国石油天然气股份有限公司 | Method and device for calculating residual gas production capacity |
| CN115929278A (en) * | 2021-08-30 | 2023-04-07 | 中国石油天然气股份有限公司 | Calculation method and device for residual inspiratory capacity |
| CN113761743A (en) * | 2021-09-07 | 2021-12-07 | 中国地质大学（北京） | Method and device for calculating regional shale gas reserves, terminal equipment and storage medium |
| CN113761743B (en) * | 2021-09-07 | 2023-05-05 | 中国地质大学（北京） | Method, device, terminal equipment and storage medium for calculating regional shale gas reserves |
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