CN107939371B - A kind of method and device of determining well pattern thickening feasibility - Google Patents
A kind of method and device of determining well pattern thickening feasibility Download PDFInfo
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- CN107939371B CN107939371B CN201710974861.3A CN201710974861A CN107939371B CN 107939371 B CN107939371 B CN 107939371B CN 201710974861 A CN201710974861 A CN 201710974861A CN 107939371 B CN107939371 B CN 107939371B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/30—Specific pattern of wells, e.g. optimizing the spacing of wells
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
- G06Q50/06—Electricity, gas or water supply
Abstract
The embodiment of the present application discloses a kind of method and device of determining well pattern thickening feasibility.The described method includes: determining the corresponding average accumulated gas production of initial well spacing density and recovery ratio, and determine the corresponding average accumulated gas production of infilled well pattern density and recovery ratio；The corresponding Encryption Well of infilled well pattern density is calculated according to the corresponding average accumulated gas production of initial well spacing density and the corresponding average accumulated gas production of infilled well pattern density and increases production tolerance, and according to the corresponding recovery ratio of initial well spacing density and the corresponding recovery ratio increment of the corresponding recovery factor calculation infilled well pattern density of infilled well pattern density；Based on the corresponding average accumulated gas production of infilled well pattern density, Encryption Well volume increase tolerance and recovery ratio increment, the well pattern thickening feasibility of purpose gas reservoir is determined.Technical solution provided by the embodiments of the present application can provide the foundation of reasonable well pattern thickening, to improve recovery ratio and guarantee economic benefit.
Description
Technical field
This application involves Reservoir Development technical field, in particular to a kind of the method and dress of determining well pattern thickening feasibility
It sets.
Background technique
Hypotonic-DAMAGE OF TIGHT SAND GAS RESERVOIRS is a kind of important gas reservoir types.Due to effective storage in hypotonic-DAMAGE OF TIGHT SAND GAS RESERVOIRS
Layer scale is smaller, and the development scheme of the development scheme or failure formula that generally use fixed well pattern carries out initial stage exploitation, and in the early stage
In development process, initial stage well pattern is often difficult to control whole reserves in hypotonic-DAMAGE OF TIGHT SAND GAS RESERVOIRS, it usually needs in exploitation
Phase and later stage carry out well pattern thickening, to improve the recovery ratio of the gas reservoir.
However, being carried out in well pattern in the actual application of well pattern thickening in the early stage, it is possible that well pattern thickening is compared
It is sparse or the case where than comparatively dense, when well pattern thickening than it is sparse when, may cause inadequate to the controlling extent of reserves in plane；
When well pattern thickening is than comparatively dense, serious inter-well interference may be generated, to influence final economic benefit.Therefore, needle
To hypotonic-DAMAGE OF TIGHT SAND GAS RESERVOIRS, a kind of method for determining the gas reservoir well pattern thickening feasibility is needed, to carry out rational well pattern
Encryption.
Summary of the invention
The purpose of the embodiment of the present application is to provide a kind of method and device of determining well pattern thickening feasibility, reasonable to provide
Well pattern thickening foundation, to improve recovery ratio and guarantee economic benefit.
In order to solve the above technical problems, the embodiment of the present application provides a kind of method and device of determining well pattern thickening feasibility
It is achieved in that
A kind of method of determining well pattern thickening feasibility, initial well spacing density and the infilled well pattern for providing purpose gas reservoir are close
Degree, wherein the infilled well pattern density indicates that carrying out well pattern to the purpose gas reservoir on the basis of the initial well spacing density adds
Well spacing density after close；The described method includes:
It determines the corresponding average accumulated gas production of the initial well spacing density and recovery ratio, and determines the infilled well pattern
The corresponding average accumulated gas production of density and recovery ratio；Wherein, the average accumulated gas production indicates gas in the purpose gas reservoir
The average value of the cumulative gas production of well；
It is corresponding average according to the initial corresponding average accumulated gas production of well spacing density and the infilled well pattern density
Cumulative gas production calculates the corresponding Encryption Well of the infilled well pattern density and increases production tolerance, and according to the initial well spacing density pair
The corresponding recovery ratio increment of infilled well pattern density described in the recovery ratio and the corresponding recovery factor calculation of the infilled well pattern density answered；
Increase production tolerance and recovery ratio increment based on the corresponding average accumulated gas production of the infilled well pattern density, Encryption Well,
Determine the well pattern thickening feasibility of the purpose gas reservoir.
In preferred embodiment, the corresponding Encryption Well of the infilled well pattern density is calculated using following formula and increases production tolerance:
A=(n2×q2-n1×q1)/(n2-n1)
Wherein, A indicates that the corresponding Encryption Well of the infilled well pattern density increases production tolerance, n1And n2It respectively indicates described initial
Well spacing density and the infilled well pattern density, q1And q2Respectively indicate the corresponding average accumulated gas production of the initial well spacing density
Average accumulated gas production corresponding with the infilled well pattern density.
In preferred embodiment, the difference of the infilled well pattern density and initial well spacing density is 1 mouthful/sq-km.
It is described to calculate the corresponding recovery ratio increment of the infilled well pattern density in preferred embodiment, comprising:
The corresponding recovery ratio of the infilled well pattern density is subtracted to the difference of the corresponding recovery ratio of the initial well spacing density
As the corresponding recovery ratio increment of the infilled well pattern density.
It is described that gas is increased production based on the corresponding average accumulated gas production of the infilled well pattern density, Encryption Well in preferred embodiment
Amount and recovery ratio increment, determine the well pattern thickening feasibility of the purpose gas reservoir, comprising:
Determine the cumulative gas production threshold value and Encryption Well units increased in production threshold value of the purpose gas reservoir；
Based on default recovery ratio delta threshold, the cumulative gas production threshold value and the Encryption Well units increased in production threshold value, and
The corresponding average accumulated gas production of the infilled well pattern density, Encryption Well volume increase tolerance and recovery ratio increment, determine the purpose
The well pattern thickening feasibility of gas reservoir.
In preferred embodiment, the cumulative gas production threshold value and Encryption Well units increased in production threshold value of the determination purpose oil reservoir, packet
It includes:
Obtain single gas well comprehensive method of investment cost of current gas price and the purpose gas reservoir；
According to single gas well comprehensive method of investment cost of default earning rate threshold value, the current gas price and the purpose gas reservoir, really
The fixed cumulative gas production threshold value；
According to single gas well comprehensive method of investment cost of the current gas price and the purpose gas reservoir, the Encryption Well volume increase is determined
Measure threshold value.
In preferred embodiment, the default earning rate threshold value is 12 percentages.
In preferred embodiment, the default recovery ratio delta threshold is 5 percentages.
It is described based on default recovery ratio delta threshold, the cumulative gas production threshold value and the Encryption Well in preferred embodiment
Units increased in production threshold value and the corresponding average accumulated gas production of the infilled well pattern density, Encryption Well volume increase tolerance and recovery ratio increase
Amount, determines the well pattern thickening feasibility of the purpose gas reservoir, comprising:
When the corresponding average accumulated gas production of the infilled well pattern density is greater than the cumulative gas production threshold value, the encryption
Well increases production tolerance greater than the Encryption Well units increased in production threshold value and the recovery ratio increment is greater than the default recovery ratio delta threshold
When, determine that the result of the well pattern thickening feasibility of the purpose gas reservoir is feasible.
A kind of device of determining well pattern thickening feasibility, described device provide initial well spacing density and the encryption of purpose gas reservoir
Well spacing density, wherein the infilled well pattern density indicates to carry out the purpose gas reservoir on the basis of the initial well spacing density
Well spacing density after well pattern thickening；Described device includes: cumulative gas production and recovery ratio determining module, volume increase tolerance and recovery ratio
Increment determining module and well pattern thickening feasibility determining module；Wherein,
The cumulative gas production and recovery ratio determining module, for determining the corresponding average accumulated of the initial well spacing density
Gas production and recovery ratio, and determine the corresponding average accumulated gas production of the infilled well pattern density and recovery ratio；Wherein, described
Average accumulated gas production indicates the average value of the cumulative gas production of gas well in the purpose gas reservoir；
The volume increase tolerance and recovery ratio increment determining module, for corresponding average tired according to the initial well spacing density
Product gas production and the corresponding average accumulated gas production of the infilled well pattern density calculate the corresponding encryption of the infilled well pattern density
Well increases production tolerance, and according to the initial corresponding recovery ratio of well spacing density and the corresponding recovery ratio of the infilled well pattern density
Calculate the corresponding recovery ratio increment of the infilled well pattern density；
The well pattern thickening feasibility determining module, for producing gas based on the corresponding average accumulated of the infilled well pattern density
Amount, Encryption Well volume increase tolerance and recovery ratio increment, determine the well pattern thickening feasibility of the purpose gas reservoir.
The embodiment of the present application provides a kind of method and device of determining well pattern thickening feasibility, can determine described initial
The corresponding average accumulated gas production of well spacing density and recovery ratio, and determine that the corresponding average accumulated of the infilled well pattern density produces
Tolerance and recovery ratio；Wherein, the average accumulated gas production indicates being averaged for the cumulative gas production of gas well in the purpose gas reservoir
Value；It can be corresponding average tired according to the initial corresponding average accumulated gas production of well spacing density and the infilled well pattern density
Product gas production calculates the corresponding Encryption Well of the infilled well pattern density and increases production tolerance, and corresponding according to the initial well spacing density
Recovery ratio and the corresponding recovery factor calculation of the infilled well pattern density described in the corresponding recovery ratio increment of infilled well pattern density；It can
To determine institute based on the corresponding average accumulated gas production of the infilled well pattern density, Encryption Well volume increase tolerance and recovery ratio increment
The well pattern thickening feasibility of purpose gas reservoir is stated, in this way, the foundation of reasonable well pattern thickening can be provided for the purpose gas reservoir, from
And it improves recovery ratio and guarantees economic benefit.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The some embodiments recorded in application, for those of ordinary skill in the art, in the premise of not making the creative labor property
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of flow chart of the embodiment of the method for determining well pattern thickening feasibility of the application；
Fig. 2 is the composite structural diagram for the Installation practice that the application determines well pattern thickening feasibility.
Specific embodiment
The embodiment of the present application provides a kind of method and device of determining well pattern thickening feasibility.
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.
This application provides a kind of methods of determining well pattern thickening feasibility.The method of the determining well pattern thickening feasibility
There is provided the initial well spacing density and infilled well pattern density of purpose gas reservoir, wherein the infilled well pattern density is indicated described first
The well spacing density after well pattern thickening is carried out to the purpose gas reservoir on the basis of beginning well spacing density.
In the present embodiment, the purpose gas reservoir can refer to the still undetermined gas reservoir of well pattern thickening feasibility.It is described
Purpose gas reservoir can be hypotonic-DAMAGE OF TIGHT SAND GAS RESERVOIRS.
In the present embodiment, the infilled well pattern density and the difference of initial well spacing density can be 1 mouthful/square thousand
Rice.For example, the initial well spacing density is 2 mouthfuls/sq-km, the well spacing density of the purpose gas reservoir can be encrypted to well pattern
Density is the infilled well pattern density of 3 mouthfuls/sq-km.
Fig. 1 is a kind of flow chart of the embodiment of the method for determining well pattern thickening feasibility of the application.As shown in Figure 1, described
The method for determining well pattern secret feasibility, includes the following steps.
Step S101: the corresponding average accumulated gas production of the initial well spacing density and recovery ratio are determined, and determines institute
State the corresponding average accumulated gas production of infilled well pattern density and recovery ratio；Wherein, the average accumulated gas production indicates the mesh
Gas reservoir in gas well cumulative gas production average value.
In the present embodiment, Numerical Simulation of Gas Reservoir method can be used, determines that the initial well spacing density is corresponding flat
Equal cumulative gas production and recovery ratio, and determine the corresponding average accumulated gas production of the infilled well pattern density and recovery ratio.Its
In, the average accumulated gas production indicates the average value of the cumulative gas production of gas well in the purpose gas reservoir.The purpose gas reservoir
In may include at least a bite gas well.Every implication well has corresponding cumulative gas production.
In the present embodiment, using Numerical Simulation of Gas Reservoir method, determine that the initial well spacing density is corresponding average tired
Product gas production and recovery ratio, and determine the corresponding average accumulated gas production of the infilled well pattern density and recovery ratio, specifically may be used
To include, it is possible, firstly, to obtain in the purpose gas reservoir gas well in the static parameter of different times.Wherein, the static parameter
May include: gas well well location, completion mode, well track, geological layering data, log analysis data, different times perforating parameter,
Gas well coring data and core observation data etc..It is then possible to establish the geology of the purpose gas reservoir according to the static parameter
Model.History matching can be carried out to the initial geological model, obtain the history matching result of the purpose gas reservoir.According to institute
The history matching result and geological model for stating purpose gas reservoir determine the purpose gas reservoir numerical value, to complete the purpose gas reservoir
Numerical simulation.Finally, on the basis of the numerical simulation result of the purpose gas reservoir, according to gas in the purpose gas reservoir of setting
The production targets such as well production method (production method of constant-pressure or fixed output quota amount) and abandonment rate (being lower than 0.1 ten thousand sides/day),
It can determine the corresponding average accumulated gas production of the initial well spacing density and recovery ratio, and determine the infilled well pattern density
Corresponding average accumulated gas production and recovery ratio.
For example, the purpose gas reservoir can be 1.88 hundred million for the reserves abundance chosen in certain hypotonic-compact sandstone gas Tanaka
Side/sq-km, the gas reservoir that area is 14.6 sq-kms.Using Numerical Simulation of Gas Reservoir method, can determine in different well patterns
The average accumulated gas production and recovery ratio of the purpose gas reservoir under density.Table 1 is in the embodiment of the present application in different well spacing densities
Under average accumulated gas production and recovery ratio.
Average accumulated gas production and recovery ratio of the table 1 under different well spacing densities
Step S102: according to the initial corresponding average accumulated gas production of well spacing density and the infilled well pattern density pair
The average accumulated gas production answered calculates the corresponding Encryption Well volume increase tolerance of the infilled well pattern density, and according to the initial well
Infilled well pattern density is corresponding described in the corresponding recovery ratio of reticular density and the corresponding recovery factor calculation of the infilled well pattern density adopts
Yield increment.
In the present embodiment, according to the initial corresponding average accumulated gas production of well spacing density and the infilled well pattern
The corresponding average accumulated gas production of density can calculate the corresponding Encryption Well volume increase of the infilled well pattern density using following formula
Tolerance:
A=(n2×q2-n1×q1)/(n2-n1)
Wherein, A indicates that the corresponding Encryption Well of the infilled well pattern density increases production tolerance, n1And n2It respectively indicates described initial
Well spacing density and the infilled well pattern density, q1And q2Respectively indicate the corresponding average accumulated gas production of the initial well spacing density
Average accumulated gas production corresponding with the infilled well pattern density.
In the present embodiment, corresponding according to the initial corresponding recovery ratio of well spacing density and the infilled well pattern density
Recovery factor calculation described in the corresponding recovery ratio increment of infilled well pattern density, can specifically include, can be by the infilled well pattern
The corresponding recovery ratio of density subtracts the difference of the corresponding recovery ratio of the initial well spacing density as the infilled well pattern density pair
The recovery ratio increment answered.
For example, table 2 be in the embodiment of the present application according in table 1 average accumulated gas production and recovery factor calculation obtain plus
Mi Jing increases production tolerance and recovery ratio increment.Wherein, the difference of the infilled well pattern density and initial well spacing density can for 1 mouthful/
Sq-km.When the initial well spacing density is 2 mouthfuls/sq-km, the infilled well pattern density is 3 mouthfuls/sq-km, institute
It states the corresponding Encryption Well volume increase tolerance of infilled well pattern density and recovery ratio increment is respectively 2101.84 ten thousand sides/mouth and 11.18 percentages
Than；When the initial well spacing density is 3 mouthfuls/sq-km, the infilled well pattern density is 4 mouthfuls/sq-km, the encryption
The corresponding Encryption Well volume increase tolerance of well spacing density and recovery ratio increment are respectively 1372.40 ten thousand sides/mouth and 7.30 percentages；Successively
Analogize, when the initial well spacing density is 7 mouthfuls/sq-km, the infilled well pattern density is 8 mouthfuls/sq-km, described to add
The corresponding Encryption Well volume increase tolerance of dense well pattern density and recovery ratio increment are respectively 191.76 ten thousand sides/mouth and 1.02 percentages.
2 Encryption Well of table increases production tolerance and recovery ratio increment
Step S103: it based on the corresponding average accumulated gas production of the infilled well pattern density, Encryption Well volume increase tolerance and adopts
Yield increment determines the well pattern thickening feasibility of the purpose gas reservoir.
In the present embodiment, gas is increased production based on the corresponding average accumulated gas production of the infilled well pattern density, Encryption Well
Amount and recovery ratio increment, determine the well pattern thickening feasibility of the purpose gas reservoir, can specifically include, can determine the purpose
The cumulative gas production threshold value and Encryption Well units increased in production threshold value of gas reservoir.It can be produced based on default recovery ratio delta threshold, the accumulation
Tolerance threshold value and the Encryption Well units increased in production threshold value and the corresponding average accumulated gas production of the infilled well pattern density, encryption
Well increases production tolerance and recovery ratio increment, determines the well pattern thickening feasibility of the purpose gas reservoir.Wherein, the default recovery ratio increases
Amount threshold value can be 5 percentages.
In the present embodiment, the cumulative gas production threshold value and Encryption Well units increased in production threshold value of the purpose oil reservoir are determined, is had
Body may include single gas well comprehensive method of investment cost of available current gas price and the purpose gas reservoir.Wherein, the current gas
Valence indicates the price of current natural gas factory.It can be according to default earning rate threshold value, the current gas price and the purpose gas reservoir
Single gas well comprehensive method of investment cost, determine the cumulative gas production threshold value.It can be according to the current gas price and the purpose gas
Single gas well comprehensive method of investment cost of hiding, determines the Encryption Well units increased in production threshold value.
In the present embodiment, the lower limit of the cumulative gas production threshold value can be characterized using following formula:
Wherein, Q1Indicate that the lower limit of the cumulative gas production threshold value, a indicate single gas well comprehensive method of investment of the purpose gas reservoir
Cost, b indicate the current gas price, and c indicates the default earning rate threshold value.Wherein, the default earning rate threshold value can be
12 percentages.Fixed investment cost, the loan interest rate, the length of maturity, sale of the list gas well comprehensive method of investment cost and single gas well
The parameters such as tax, urban construction correlative charges, resource tax are associated.
In the present embodiment, the lower limit of the Encryption Well units increased in production threshold value can be characterized using following formula:
Wherein, Q2Indicate that the lower limit of the cumulative gas production threshold value, a indicate single gas well comprehensive method of investment of the purpose gas reservoir
Cost, b indicate the current gas price.
In the present embodiment, based on default recovery ratio delta threshold, the cumulative gas production threshold value and the Encryption Well
Units increased in production threshold value and the corresponding average accumulated gas production of the infilled well pattern density, Encryption Well volume increase tolerance and recovery ratio increase
Amount, determines the well pattern thickening feasibility of the purpose gas reservoir, can specifically include, when the infilled well pattern density is corresponding average
Cumulative gas production is greater than the cumulative gas production threshold value, Encryption Well volume increase tolerance is greater than the Encryption Well units increased in production threshold value,
And the recovery ratio increment be greater than the default recovery ratio delta threshold when, can determine that the well pattern thickening of the purpose gas reservoir can
The result of row is feasible, it can encrypts to described the well spacing density of the purpose gas reservoir from the initial well spacing density and adds
Dense well pattern density.Otherwise, it can determine that the result of the well pattern thickening feasibility of the purpose gas reservoir is infeasible.
For example, for the purpose gas reservoir in Tables 1 and 2, single gas of the available current gas price and the purpose gas reservoir
Well comprehensive method of investment cost.Wherein, the price of current gas price, i.e. natural gas factory is 1.15 yuan/side；Single gas well comprehensive method of investment cost
It is 9,200,000 yuan.According to the economic well-being of workers and staff standard of capital investment requirements, the default earning rate threshold value is 12 percentages, correspondingly, institute
Stating cumulative gas production threshold value is 15,000,000 sides/mouth, and the Encryption Well units increased in production threshold value is 10,750,000 sides/mouth.The default harvesting
Rate delta threshold is 5 percentages.
When the initial well spacing density is 2 mouthfuls/sq-km, and the infilled well pattern density is 3 mouthfuls/sq-km, institute
State the corresponding average accumulated gas production of infilled well pattern density be 2845.07, be greater than the cumulative gas production threshold value (15,000,000 sides/
Mouthful)；The corresponding Encryption Well volume increase tolerance of the infilled well pattern density is 2101.84 ten thousand sides/mouth, is greater than the Encryption Well units increased in production
Threshold value (10,750,000 sides/mouth)；Corresponding 11.18 percentage of recovery ratio increment of the infilled well pattern density default is adopted greater than described
Yield delta threshold (5 percentage)；In this way, the result of the well pattern thickening feasibility be it is feasible, i.e., the described purpose gas reservoir has from 2
Mouth/sq-km is encrypted to the potentiality of 3 mouthfuls/sq-km.
When the initial well spacing density is 3 mouthfuls/sq-km, and the infilled well pattern density is 4 mouthfuls/sq-km, institute
State the corresponding average accumulated gas production of infilled well pattern density be 2476.90, be greater than the cumulative gas production threshold value (15,000,000 sides/
Mouthful)；The corresponding Encryption Well volume increase tolerance of the infilled well pattern density is 1372.40 ten thousand sides/mouth, is greater than the Encryption Well units increased in production
Threshold value (10,750,000 sides/mouth)；Corresponding 7.30 percentage of recovery ratio increment of the infilled well pattern density, is greater than the default harvesting
Rate delta threshold (5 percentage)；In this way, the result of the well pattern thickening feasibility be it is feasible, i.e., the described purpose gas reservoir has from 3
Mouth/sq-km is encrypted to the potentiality of 4 mouthfuls/sq-km.
When the initial well spacing density is 4 mouthfuls/sq-km, and the infilled well pattern density is 5 mouthfuls/sq-km, institute
State the corresponding average accumulated gas production of infilled well pattern density be 2177.79, be greater than the cumulative gas production threshold value (15,000,000 sides/
Mouthful)；The corresponding Encryption Well volume increase tolerance of the infilled well pattern density is 981.36 ten thousand sides/mouth, is less than the Encryption Well units increased in production
Threshold value (10,750,000 sides/mouth)；Corresponding 5.22 percentage of recovery ratio increment of the infilled well pattern density default is adopted greater than described
Yield delta threshold (5 percentage)；In this way, the result of the well pattern thickening feasibility be it is infeasible, i.e., the described purpose gas reservoir does not have
Have from 4 mouthfuls/sq-km and encrypts to the potentiality of 5 mouthfuls/sq-km.
In summary as a result, it is feasible that the well spacing density of the hypotonic-DAMAGE OF TIGHT SAND GAS RESERVOIRS, which is encrypted to 4 mouthfuls/sq-km,.
Fig. 2 is the composite structural diagram for the Installation practice that the application determines well pattern thickening feasibility.The determining well pattern adds
The device of close feasibility provides the initial well spacing density and infilled well pattern density of purpose gas reservoir, wherein the infilled well pattern density
It indicates to carry out the well spacing density after well pattern thickening to the purpose gas reservoir on the basis of the initial well spacing density.As shown in Fig. 2,
The device of the determining well pattern thickening feasibility may include: cumulative gas production and recovery ratio determining module 100, volume increase tolerance and
Recovery ratio increment determining module 200 and well pattern thickening feasibility determining module 300.
It is corresponding to be determined for the initial well spacing density for the cumulative gas production and recovery ratio determining module 100
Average accumulated gas production and recovery ratio, and determine the corresponding average accumulated gas production of the infilled well pattern density and recovery ratio；
Wherein, the average accumulated gas production indicates the average value of the cumulative gas production of gas well in the purpose gas reservoir.
The volume increase tolerance and recovery ratio increment determining module 200 can be used for corresponding according to the initial well spacing density
Average accumulated gas production and the corresponding average accumulated gas production of the infilled well pattern density calculate the infilled well pattern density pair
The Encryption Well volume increase tolerance answered, and it is corresponding according to the initial corresponding recovery ratio of well spacing density and the infilled well pattern density
Recovery factor calculation described in the corresponding recovery ratio increment of infilled well pattern density.
The well pattern thickening feasibility determining module 300 can be used for corresponding average based on the infilled well pattern density
Cumulative gas production, Encryption Well volume increase tolerance and recovery ratio increment, determine the well pattern thickening feasibility of the purpose gas reservoir.
The method of the Installation practice of the determining well pattern thickening feasibility and the determining well pattern thickening feasibility is implemented
Example is corresponding, and the technical solution for determining the embodiment of the method for well pattern thickening feasibility, and adquisitiones embodiments may be implemented
Technical effect.
In the 1990s, the improvement of a technology can be distinguished clearly be on hardware improvement (for example,
Improvement to circuit structures such as diode, transistor, switches) or software on improvement (improvement for method flow).So
And with the development of technology, the improvement of current many method flows can be considered as directly improving for hardware circuit.
Designer nearly all obtains corresponding hardware circuit by the way that improved method flow to be programmed into hardware circuit.Cause
This, it cannot be said that the improvement of a method flow cannot be realized with hardware entities module.For example, programmable logic device
(Programmable Logic Device, PLD) (such as field programmable gate array (Field Programmable Gate
Array, FPGA)) it is exactly such a integrated circuit, logic function determines device programming by user.By designer
Voluntarily programming comes a digital display circuit " integrated " on a piece of PLD, designs and makes without asking chip maker
Dedicated IC chip.Moreover, nowadays, substitution manually makes IC chip, this programming is also used instead mostly " is patrolled
Volume compiler (logic compiler) " software realizes that software compiler used is similar when it writes with program development,
And the source code before compiling also write by handy specific programming language, this is referred to as hardware description language
(Hardware Description Language, HDL), and HDL is also not only a kind of, but there are many kind, such as ABEL
(Advanced Boolean Expression Language)、AHDL(Altera Hardware Description
Language)、 Confluence、CUPL(Cornell University Programming Language)、HDCal、
JHDL(Java Hardware Description Language)、Lava、Lola、MyHDL、PALASM、RHDL(Ruby
Hardware Description Language) etc., VHDL (Very-High-Speed is most generally used at present
Integrated Circuit Hardware Description Language) and Verilog2.Those skilled in the art
It will be apparent to the skilled artisan that only needing method flow slightly programming in logic and being programmed into integrated circuit with above-mentioned several hardware description languages
In, so that it may it is readily available the hardware circuit for realizing the logical method process.
It is also known in the art that other than 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 so that controller with logic gate, switch, specific integrated circuit, programmable
Logic controller realizes identical function with the form for being embedded in microcontroller etc..Therefore this controller is considered one kind
Hardware component, and the structure that the device for realizing various functions for including in it can also be considered as in hardware component.Or
Even, can will be considered as realizing the device of various functions either the software module of implementation method can be Hardware Subdivision again
Structure in part.
Device that above-described embodiment illustrates, module can specifically realize by computer chip or entity, or by having certain
The product of function is planted to realize.
For convenience of description, it is divided into various modules when description apparatus above with function to describe respectively.Certainly, implementing this
The function of each module can be realized in the same or multiple software and or hardware when application.
As seen through the above description of the embodiments, those skilled in the art can be understood that the application can
It realizes by means of software and necessary general hardware platform.Based on this understanding, the technical solution essence of the application
On in other words the part that contributes to existing technology can be embodied in the form of software products, in a typical configuration
In, calculating equipment includes one or more processors (CPU), input/output interface, network interface and memory.The computer is soft
Part product may include that some instructions are used so that a computer equipment (can be personal computer, server or network
Equipment etc.) execute method described in certain parts of each embodiment of the application or embodiment.The computer software product can
To be stored in 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
The example of readable medium.Computer-readable medium includes that permanent and non-permanent, removable and non-removable media can be by
Any method or technique come realize information store.Information can be computer readable instructions, data structure, the module of program or its
His data.The example of the storage medium of computer includes, but are not limited to phase change memory (PRAM), static random access memory
(SRAM), dynamic random access memory (DRAM), other kinds of random access memory (RAM), read-only memory
(ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory techniques, CD-ROM are read-only
Memory (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.According to
Herein defines, and computer-readable medium does not include of short duration computer readable media (transitory media), such as modulation
Data-signal and carrier wave.
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 device 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 application can be used in numerous general or special purpose computing system environments or configuration.Such as: personal computer, clothes
Business device computer, handheld device or portable device, laptop device, multicomputer system, microprocessor-based system, set
Top box, programmable consumer-elcetronics devices, network PC, minicomputer, mainframe computer including any of the above system or equipment
Distributed computing environment etc..
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.
Although depicting the application by embodiment, it will be appreciated by the skilled addressee that the application there are many deformation and
Variation is without departing from spirit herein, it is desirable to which the attached claims include these deformations and change without departing from the application's
Spirit.
Claims (10)
1. a kind of method of determining well pattern thickening feasibility, which is characterized in that provide purpose gas reservoir initial well spacing density and
Infilled well pattern density, wherein the infilled well pattern density indicates on the basis of the initial well spacing density to the purpose gas reservoir
Well spacing density after carrying out well pattern thickening；The described method includes:
It determines the corresponding average accumulated gas production of the initial well spacing density and recovery ratio, and determines the infilled well pattern density
Corresponding average accumulated gas production and recovery ratio；Wherein, the average accumulated gas production indicates gas well in the purpose gas reservoir
The average value of cumulative gas production；
According to the initial corresponding average accumulated gas production of well spacing density and the corresponding average accumulated of the infilled well pattern density
Gas production calculates the corresponding Encryption Well of the infilled well pattern density and increases production tolerance, and corresponding according to the initial well spacing density
The corresponding recovery ratio increment of infilled well pattern density described in recovery ratio and the corresponding recovery factor calculation of the infilled well pattern density；
Based on the corresponding average accumulated gas production of the infilled well pattern density, Encryption Well volume increase tolerance and recovery ratio increment, determine
The well pattern thickening feasibility of the purpose gas reservoir.
2. a kind of method of determining well pattern thickening feasibility according to claim 1, which is characterized in that use following formula
Calculate the corresponding Encryption Well volume increase tolerance of the infilled well pattern density:
A=(n2×q2-n1×q1)/(n2-n1)
Wherein, A indicates that the corresponding Encryption Well of the infilled well pattern density increases production tolerance, n1And n2Respectively indicate the initial well pattern
Density and the infilled well pattern density, q1And q2Respectively indicate the corresponding average accumulated gas production of the initial well spacing density and institute
State the corresponding average accumulated gas production of infilled well pattern density.
3. a kind of method of determining well pattern thickening feasibility according to claim 2, which is characterized in that the infilled well pattern
Density and the difference of initial well spacing density are 1 mouthful/sq-km.
4. a kind of method of determining well pattern thickening feasibility according to claim 1, which is characterized in that described in the calculating
The corresponding recovery ratio increment of infilled well pattern density, comprising:
Using the corresponding recovery ratio of the infilled well pattern density subtract the difference of the corresponding recovery ratio of the initial well spacing density as
The corresponding recovery ratio increment of the infilled well pattern density.
5. a kind of method of determining well pattern thickening feasibility according to claim 1, which is characterized in that described based on described
The corresponding average accumulated gas production of infilled well pattern density, Encryption Well volume increase tolerance and recovery ratio increment, determine the purpose gas reservoir
Well pattern thickening feasibility, comprising:
Determine the cumulative gas production threshold value and Encryption Well units increased in production threshold value of the purpose gas reservoir；
Based on default recovery ratio delta threshold, the cumulative gas production threshold value and the Encryption Well units increased in production threshold value and described
The corresponding average accumulated gas production of infilled well pattern density, Encryption Well volume increase tolerance and recovery ratio increment, determine the purpose gas reservoir
Well pattern thickening feasibility.
6. a kind of method of determining well pattern thickening feasibility according to claim 5, which is characterized in that described in the determination
The cumulative gas production threshold value and Encryption Well units increased in production threshold value of purpose oil reservoir, comprising:
Obtain single gas well comprehensive method of investment cost of current gas price and the purpose gas reservoir；
According to single gas well comprehensive method of investment cost of default earning rate threshold value, the current gas price and the purpose gas reservoir, institute is determined
State cumulative gas production threshold value；
According to single gas well comprehensive method of investment cost of the current gas price and the purpose gas reservoir, the Encryption Well units increased in production threshold is determined
Value.
7. a kind of method of determining well pattern thickening feasibility according to claim 6, which is characterized in that the default income
Rate threshold value is 12 percentages.
8. a kind of method of determining well pattern thickening feasibility according to claim 5, which is characterized in that the default harvesting
Rate delta threshold is 5 percentages.
9. a kind of method of determining well pattern thickening feasibility according to claim 5, which is characterized in that described based on default
Recovery ratio delta threshold, the cumulative gas production threshold value and the Encryption Well units increased in production threshold value and the infilled well pattern density
Corresponding average accumulated gas production, Encryption Well volume increase tolerance and recovery ratio increment, determine that the well pattern thickening of the purpose gas reservoir can
Row, comprising:
When the corresponding average accumulated gas production of the infilled well pattern density is greater than the cumulative gas production threshold value, the Encryption Well increases
When gas production is greater than the Encryption Well units increased in production threshold value and the recovery ratio increment and is greater than the default recovery ratio delta threshold,
Determine that the result of the well pattern thickening feasibility of the purpose gas reservoir is feasible.
10. a kind of device of determining well pattern thickening feasibility, which is characterized in that the initial well pattern of described device offer purpose gas reservoir
Density and infilled well pattern density, wherein the infilled well pattern density indicates on the basis of the initial well spacing density to the mesh
Gas reservoir carry out well pattern thickening after well spacing density；Described device includes: cumulative gas production and recovery ratio determining module, volume increase gas
Amount and recovery ratio increment determining module and well pattern thickening feasibility determining module；Wherein,
The cumulative gas production and recovery ratio determining module, for determining that the corresponding average accumulated of the initial well spacing density produces gas
Amount and recovery ratio, and determine the corresponding average accumulated gas production of the infilled well pattern density and recovery ratio；Wherein, described average
Cumulative gas production indicates the average value of the cumulative gas production of gas well in the purpose gas reservoir；
The volume increase tolerance and recovery ratio increment determining module, for being produced according to the corresponding average accumulated of the initial well spacing density
Tolerance and the corresponding average accumulated gas production of the infilled well pattern density calculate the corresponding Encryption Well of the infilled well pattern density and increase
Gas production, and according to the initial corresponding recovery ratio of well spacing density and the corresponding recovery factor calculation of the infilled well pattern density
The corresponding recovery ratio increment of the infilled well pattern density；
The well pattern thickening feasibility determining module, for based on the corresponding average accumulated gas production of the infilled well pattern density,
Encryption Well increases production tolerance and recovery ratio increment, determines the well pattern thickening feasibility of the purpose gas reservoir.
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| CN109236265B (en) * | 2018-08-29 | 2020-12-01 | 中国石油天然气股份有限公司 | Method for optimizing tight gas reservoir well pattern |
| CN111119840B (en) * | 2018-11-01 | 2023-05-26 | 中国石油天然气股份有限公司 | Well position optimization method for high water-cut period oil reservoir |
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