CN106499370A - Method and device for calculating liquid production amount of each interval of layered oil production well for synchronous separate injection and separate production of well groups - Google Patents

Method and device for calculating liquid production amount of each interval of layered oil production well for synchronous separate injection and separate production of well groups Download PDF

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Publication number
CN106499370A
CN106499370A CN201610702596.9A CN201610702596A CN106499370A CN 106499370 A CN106499370 A CN 106499370A CN 201610702596 A CN201610702596 A CN 201610702596A CN 106499370 A CN106499370 A CN 106499370A
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well
layered
water injection
oil production
coefficient
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付亚荣
马永忠
付丽霞
李云
李小永
薛改珍
朱伟
景暖
李春燕
姜超
姜一超
姚庆童
张云钊
张睿荫
郭栋
付茜
曹瑾
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Petrochina Co Ltd
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Petrochina Co Ltd
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK 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
    • E21B43/14—Obtaining from a multiple-zone well
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK 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
    • E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
    • E21B43/20—Displacing by water
    • G—PHYSICS
    • G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
    • G16Z—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS, NOT OTHERWISE PROVIDED FOR
    • G16Z99/00—Subject matter not provided for in other main groups of this subclass

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  • Engineering & Computer Science (AREA)
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  • Mining & Mineral Resources (AREA)
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  • Environmental & Geological Engineering (AREA)
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  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
  • Management, Administration, Business Operations System, And Electronic Commerce (AREA)

Abstract

The invention discloses a method and a device for calculating the liquid production capacity of each interval of a layered oil production well for synchronous separated injection and separated production of well groups, and belongs to the technical field of oil field oil production. The method comprises the following steps: determining a splitting coefficient of a layered oil production well on a target layer section in the direction of a layered water injection well; determining the liquid yield of the layered oil production well on the target interval in the direction of the layered water injection well within a specified time period based on the splitting coefficient of the layered oil production well on the target interval in the direction of the layered water injection well; determining a direction proportionality coefficient of the layered oil production well on the target interval in the direction of the layered water injection well based on the liquid production amount of the layered oil production well on the target interval in the direction of the layered water injection well within a specified time period; and determining the liquid production profile coefficient of the layered oil production well on the target interval based on the directional proportion coefficient of the layered oil production well on the target interval in the direction of the layered water injection well. The determination of the liquid production profile coefficient can provide a basis for the adjustment of the separate injection and separate mining scheme, so that the accuracy of the separate injection and separate mining scheme can be improved.

Description

Method and device for calculating liquid production amount of each interval of layered oil production well for synchronous separate injection and separate production of well groups
Technical Field
The invention relates to the technical field of oil extraction in oil fields, in particular to a method and a device for calculating liquid production capacity of each interval of a layered oil production well for well group synchronous separate injection and separate extraction.
Background
Due to the heterogeneity of oil reservoirs, when water injection development is carried out for a certain period, three major contradictions (namely interlayer contradiction, plane contradiction and in-layer contradiction) are prominent, and the problems of rapid increase of water content, reduction of oil production, great reduction of formation pressure and the like are exposed. In order to solve the problems, the aim of balanced production and reasonable development of each layer is achieved by a separate injection and separate production scheme, namely a method of separate injection and separate oil production. When separate injection and separate production are carried out, if a certain layered water injection well and a certain layered oil production well are communicated through a certain layer section, water injected in the layered water injection well flows to the layered oil production well according to a certain proportion, and the layered oil production well is influenced by the water injection on the layer section to produce a part of liquid quantity. Because the water injection rate of the stratified water injection well can affect the liquid production rate of the stratified oil production well, in order to improve the water drive development effect and the water drive recovery rate, a separate injection and separate production scheme is often required to be scientifically and reasonably formulated.
When a separate injection and separate production scheme is formulated, the injection allocation amount of a layered water injection well and the production allocation amount of a layered oil production well are often determined, and then the separate injection and separate production scheme is adjusted based on the injection allocation amount and the production allocation amount, so that the accuracy of the separate injection and separate production scheme is improved. When determining the injection allocation amount and the production allocation amount, it is often necessary to determine a fluid production profile coefficient of the layered production well in a certain interval, determine a fluid production amount of the layered production well in the interval according to the fluid production profile coefficient, determine a water injection amount of the layered production well in the interval according to the fluid production amount of the layered production well in the interval based on a communication relationship between the layered production well and the layered water injection well, and then determine the injection allocation amount of the layered water injection well and the production allocation amount of the layered production well based on the water injection amount and the fluid production amount. Because the determination of the injection allocation amount and the allocation yield depends on the determination of the liquid production amount of each layer section of the layered oil production well, a calculation method for the liquid production amount of each layer section of the layered oil production well for synchronous injection and separate production of well groups is urgently needed to provide a basis for the adjustment of a subsequent injection and separate production scheme.
Disclosure of Invention
In order to solve the problems of the related art, the embodiment of the invention provides a method and a device for calculating the liquid production capacity of each interval of a layered oil production well for well group synchronous separate injection and separate production. The technical scheme is as follows:
on the one hand, the method for calculating the liquid production capacity of each interval of the layered oil production well for synchronous separated injection and separated production of well groups is provided, and comprises the following steps:
for each layered production well of a plurality of layered production wells and for each layered water injection well of a plurality of layered water injection wells communicated with the layered production wells, determining a splitting coefficient of the layered production well in the direction of the layered water injection well on a target interval, wherein the splitting coefficient is used for indicating the relative splitting capacity of the layered production well on the target interval for the water injection quantity of the layered water injection well, and the target interval is any one of a plurality of intervals communicated between the layered production well and the layered water injection well;
determining the liquid production amount of the layered oil production well on the target interval in the direction of the layered water injection well in a specified time period based on the splitting coefficient of the layered oil production well on the target interval in the direction of the layered water injection well;
determining a direction proportionality coefficient of the layered oil production well in the direction of the layered water injection well on the target interval based on the liquid production amounts of the layered oil production well in the direction of the layered water injection well in a specified time period on the target interval, wherein the direction proportionality coefficient is the proportion of the liquid production amount of the layered oil production well in the direction of the layered water injection well on the target interval to the liquid production amount of the whole well, and the liquid production amount of the whole well is the total liquid production amount of the layered oil production well;
and determining a liquid production profile coefficient of the layered oil production well on the target interval based on a direction proportion coefficient of the layered oil production well on the target interval in the direction of the layered water injection well, wherein the liquid production profile coefficient is the proportion of the liquid production of the layered oil production well on the target interval to the liquid production of the whole well.
Optionally, the determining the number of splits of the stratified oil production well in the direction of the stratified water injection well on the target interval includes:
obtaining a splitting condition value, wherein the splitting condition value is used for indicating the splitting capacity of the layered oil production well on the target interval to the water injection quantity of the layered water injection well;
determining a splitting coefficient of the layered oil production well on the target interval in the direction of the layered water injection well according to a first specified formula based on the splitting condition value;
the first specified formula is:
wherein, the CjikThe splitting coefficient of a k layered oil production well on a j interval in the direction of an i layered water injection well is shown, the j interval is the target interval, the k layered oil production well is the layered oil production well, the i layered water injection well is the layered water injection well, and the X isjikFor the cleavage condition value, miThe total number of the layered oil production wells communicated with the i layered water injection well through the j interval is represented by pi which is the circumferential rate and e which is the base number of the natural logarithm.
Optionally, the obtaining a split condition value includes:
obtaining a plurality of first calculation parameters, wherein the plurality of first calculation parameters comprise an average formation coefficient between the layered water injection well and the layered oil production well, a bottom hole flow pressure of the layered water injection well, a bottom hole flow pressure of the layered oil production well, an injection water viscosity of the layered water injection well, a communication condition coefficient between the layered oil production well and the layered water injection well on the target interval, and a measure modification coefficient of the layered oil production well on the target interval, the production thickness coefficient of the layered production well, the permeability range coefficient of the layered production well on the target interval, the permeability of the layered water injection well on the target interval in the direction of the layered production well, the average permeability of the layered water injection well on the target interval, the position coefficient between the layered production well and the layered water injection well and the well spacing between the layered production well and the layered water injection well;
determining the splitting condition value according to a second specified formula as follows based on the plurality of first calculation parameters;
the second specified formula is:
wherein, the Δ KjikIs the average formation coefficient between the i-zone water injection well and the k-zone oil production well, PwiFor the bottom hole flow pressure of the i-zone injection well, PwkThe bottom hole flowing pressure of the k-layer oil production well, the mu is the viscosity of the injection water of the i-layer water injection well, and the Delta ZjikThe coefficient of the communication condition between the k-layer oil production well on the j-layer section and the i-layer water injection well is shown as MjkA measure improvement factor for the k-zone producing well in the j-zone, EjkIs the production thickness coefficient of the k-zone production well, GjkFor permeability coefficient of the k-zone producing well over the j-interval, βjikFor the permeability of the i-layer water injection well on the j-layer section in the direction of the k-layer oil production well, theFor the average permeability of the i-zone injection well over the j-interval, αjikFor the position coefficient between the k-zone production well and the i-zone injection well, djikAnd the well spacing between the k layered oil production well and the i layered water injection well is defined.
Optionally, the determining, based on a splitting coefficient of the stratified oil production well in the direction of the stratified water injection well on the target interval, a liquid production amount of the stratified oil production well in the direction of the stratified water injection well in a specified time period on the target interval includes:
acquiring a plurality of second calculation parameters, wherein the plurality of second calculation parameters comprise water injection quantity of the layered water injection well in a specified time period on the target interval, comprehensive elastic compression coefficient of the layered oil production well on the target interval, rock appearance volume of the layered water injection well on the target interval, and formation pressure change value of the layered water injection well in the target interval control area;
determining the liquid production amount of the layered oil production well on the target interval in the direction of the layered water injection well within a specified time period through a third specified formula based on the plurality of second calculation parameters and the splitting coefficient of the layered oil production well on the target interval in the direction of the layered water injection well;
the third specified formula is:
wherein, Q isLjikThe liquid production rate of the k-layer oil production well on the j-layer section in the direction of the i-layer water injection well in a specified time period is shown, and the Q isiwjiThe water injection quantity of the i-layer water injection well on the j-layer section in a specified time period is shown as CtFor the combined elastic compressibility of the k-zone producing well over the j-zone, VjiFor the rock exterior volume of the i-zone injection well over the j-interval, the Δ PjiThe formation pressure change value of the i-layer water injection well in the j-layer section control area is shown as CjikAnd the splitting coefficient of the k-layer oil production well on the j-layer section in the direction of the i-layer water injection well is obtained.
Optionally, the determining a directional scaling factor of the stratified oil production well in the direction of the stratified water injection well on the target interval based on the liquid production rate of the stratified oil production well in the direction of the stratified water injection well in a specified time period on the target interval includes:
determining a direction proportionality coefficient of the layered production well in the direction of the layered water injection well on the target interval through a fourth specified formula based on the liquid production amount of the layered production well in the direction of the layered water injection well in a specified time period on the target interval;
the fourth specified formula is:
wherein, R ispjikThe direction proportionality coefficient of the k layered oil production well on the j layer section in the direction of the i layered water injection well, QLjikAnd the liquid production amount of the k layered oil production well on the j interval in the direction of the i layered water injection well in a specified time period is determined, wherein n is the total number of the layered water injection wells communicated with the k layered oil production well, and m is the total number of the intervals included by the k layered oil production well.
Optionally, the determining a fluid production profile coefficient of the stratified oil production well on the target interval based on a directional scaling coefficient of the stratified oil production well on the target interval in the direction of the stratified water injection well includes:
determining a liquid production profile coefficient of the layered oil production well on the target interval through a fifth specified formula based on a directional proportion coefficient of the layered oil production well on the target interval in the direction of the layered water injection well;
the fifth specified formula is:
wherein, R ispjkIs the fluid production profile coefficient of the k-layer oil production well on the j-layer section, RpjikThe direction proportionality coefficient of the k layered oil production well on the j layer section in the direction of the i layered water injection well, nkThe total number of the layered water injection wells communicated with the k layered oil production well through the j interval.
In another aspect, a device for calculating the liquid production rate of each layer section of a layered oil production well for synchronous separate injection and separate production of well groups is provided, the device comprising:
the system comprises a first determination module, a second determination module and a third determination module, wherein the first determination module is used for determining a splitting coefficient of the layered oil production well in the direction of the layered water injection well on a target interval for each layered water injection well in a plurality of layered oil production wells communicated with the layered oil production wells, the splitting coefficient is used for indicating the relative splitting capacity of the layered oil production wells on the target interval for the water injection quantity of the layered water injection well, and the target interval is any one of a plurality of intervals communicated between the layered oil production wells and the layered water injection wells;
the second determination module is used for determining the liquid production amount of the layered oil production well on the target interval in the direction of the layered water injection well in a specified time period based on the splitting coefficient of the layered oil production well on the target interval in the direction of the layered water injection well;
a third determining module, configured to determine a directional proportionality coefficient of the layered production well in the layered water injection well direction on the target interval based on a liquid yield of the layered production well in the layered water injection well direction within a specified time period on the target interval, where the directional proportionality coefficient is a ratio of the liquid yield of the layered production well in the layered water injection well direction on the target interval to a liquid yield of a whole well, and the liquid yield of the whole well is a total liquid yield of the layered production well;
and the fourth determination module is used for determining a liquid production profile coefficient of the layered oil production well on the target interval based on a direction proportionality coefficient of the layered oil production well on the target interval in the direction of the layered water injection well, wherein the liquid production profile coefficient is the proportion of the liquid production amount of the layered oil production well on the target interval to the liquid production amount of the whole well.
Optionally, the first determining module includes:
the first obtaining unit is used for obtaining a splitting condition value, and the splitting condition value is used for indicating the splitting capacity of the layered oil production well on the target interval to the water injection quantity of the layered water injection well;
a first determining unit, configured to determine, based on the splitting condition value, a splitting coefficient of the layered oil production well in the direction of the layered water injection well in the target interval according to a first specified formula;
the first specified formula is:
wherein, the CjikThe splitting coefficient of a k layered oil production well on a j interval in the direction of an i layered water injection well is shown, the j interval is the target interval, the k layered oil production well is the layered oil production well, the i layered water injection well is the layered water injection well, and the X isjikFor the cleavage condition value, miThe total number of the layered oil production wells communicated with the i layered water injection well through the j interval is represented by pi which is the circumferential rate and e which is the base number of the natural logarithm.
Optionally, the first obtaining unit includes:
an obtaining subunit, configured to obtain a plurality of first calculation parameters, where the plurality of first calculation parameters include an average formation coefficient between the stratified water injection well and the stratified water production well, a bottom hole flow pressure of the stratified water injection well, a bottom hole flow pressure of the stratified water production well, an injection water viscosity of the stratified water injection well, a communication condition coefficient between the stratified water production well and the stratified water injection well in the target interval, a measure modification coefficient of the stratified water production well in the target interval, a production thickness coefficient of the stratified water production well, a permeability range coefficient of the stratified water production well in the target interval, a permeability of the stratified water injection well in the direction of the stratified water production well in the target interval, an average permeability of the stratified water injection well in the target interval, a location coefficient between the stratified water production well and the stratified water injection well, and a well between the stratified water production well and the stratified water injection well Distance;
a determining subunit, configured to determine, based on the plurality of first calculation parameters, the splitting condition value according to a second specified formula as follows;
the second specified formula is:
wherein, the Δ KjikIs the average formation coefficient between the i-zone water injection well and the k-zone oil production well, PwiFor the bottom hole flow pressure of the i-zone injection well, PwkThe bottom hole flowing pressure of the k-layer oil production well, the mu is the viscosity of the injection water of the i-layer water injection well, and the Delta ZjikThe coefficient of the communication condition between the k-layer oil production well on the j-layer section and the i-layer water injection well is shown as MjkA measure improvement factor for the k-zone producing well in the j-zone, EjkIs the production thickness coefficient of the k-zone production well, GjkFor permeability coefficient of the k-zone producing well over the j-interval, βjikFor the permeability of the i-layer water injection well on the j-layer section in the direction of the k-layer oil production well, theFor the average permeability of the i-zone injection well over the j-interval, αjikFor the position coefficient between the k-zone production well and the i-zone injection well, djikAnd the well spacing between the k layered oil production well and the i layered water injection well is defined.
Optionally, the second determining module includes:
a second obtaining unit, configured to obtain a plurality of second calculation parameters, where the plurality of second calculation parameters include a water injection amount of the stratified water injection well in a specified time period on the target interval, a comprehensive elastic compression coefficient of the stratified oil production well on the target interval, a rock appearance volume of the stratified water injection well on the target interval, and a formation pressure variation value of the stratified water injection well in the target interval control area;
a second determining unit, configured to determine, based on the plurality of second calculation parameters and a split coefficient of the layered production well in the direction of the layered water injection well in the target interval, a liquid production amount of the layered production well in the direction of the layered water injection well in a specified time period in the target interval by using a third specified formula;
the third specified formula is:
wherein, Q isLjikThe liquid production rate of the k-layer oil production well on the j-layer section in the direction of the i-layer water injection well in a specified time period is shown, and the Q isiwjiThe water injection quantity of the i-layer water injection well on the j-layer section in a specified time period is shown as CtFor the combined elastic compressibility of the k-zone producing well over the j-zone, VjiFor the rock exterior volume of the i-zone injection well over the j-interval, the Δ PjiThe formation pressure change value of the i-layer water injection well in the j-layer section control area is shown as CjikAnd the splitting coefficient of the k-layer oil production well on the j-layer section in the direction of the i-layer water injection well is obtained.
Optionally, the third determining module includes:
a third determining unit, configured to determine, based on a fluid production amount of the stratified oil production well in the target interval in the direction of the stratified water injection well within a specified time period, a directional proportionality coefficient of the stratified oil production well in the direction of the stratified water injection well in the target interval by using a fourth specified formula;
the fourth specified formula is:
wherein, R ispjikThe direction proportionality coefficient of the k layered oil production well on the j layer section in the direction of the i layered water injection well, QLjikAnd the liquid production amount of the k layered oil production well on the j interval in the direction of the i layered water injection well in a specified time period is determined, wherein n is the total number of the layered water injection wells communicated with the k layered oil production well, and m is the total number of the intervals included by the k layered oil production well.
Optionally, the fourth determining module includes:
a fourth determining unit, configured to determine, based on a directional proportionality coefficient of the stratified oil production well in the direction of the stratified water injection well on the target interval, a fluid production profile coefficient of the stratified oil production well on the target interval by using a fifth specified formula;
the fifth specified formula is:
wherein, R ispjkIs the fluid production profile coefficient of the k-layer oil production well on the j-layer section, RpjikThe direction proportionality coefficient of the k layered oil production well on the j layer section in the direction of the i layered water injection well, nkThe total number of the layered water injection wells communicated with the k layered oil production well through the j interval.
The technical scheme provided by the embodiment of the invention has the following beneficial effects: in the embodiment of the invention, for each layered production well in a plurality of layered production wells and for each layered water injection well in a plurality of layered water injection wells communicated with the layered production wells, the splitting coefficient of the layered production well on a target interval in the direction of the layered water injection well is determined, determining the liquid production amount of the layered oil production well on the target interval in the direction of the layered water injection well in a specified time period based on the splitting coefficient of the layered oil production well on the target interval in the direction of the layered water injection well, determining the directional proportionality coefficient of the layered oil production well on the target interval in the direction of the layered water injection well in the specified time period based on the liquid production amount of the layered oil production well on the target interval in the direction of the layered water injection well, and then, and determining the liquid production profile coefficient of the layered oil production well on the target interval based on the directional proportion coefficient of the layered oil production well on the target interval in the direction of the layered water injection well. Because the liquid production profile coefficient of the layered oil production well on the target interval can be used for determining the injection allocation amount of the layered water injection well and the yield allocation amount of the layered oil production well, and the injection allocation amount and the yield allocation amount can be used for adjusting the separate injection and separate production scheme, the determination of the liquid production profile coefficient of the layered oil production well on the target interval can provide a basis for the adjustment of the subsequent separate injection and separate production scheme, and therefore the accuracy of the separate injection and separate production scheme can be improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a flow chart of a method for calculating fluid production rates of intervals of a layered production well for synchronous separated injection and separated production of well groups according to an embodiment of the present invention;
FIG. 2 is a flow chart of another method for calculating fluid production rates of intervals of a layered production well with synchronous separate injection and separate production of well groups according to an embodiment of the present invention;
fig. 3A is a schematic structural diagram of a device for calculating fluid production amounts of intervals of a layered production well for synchronous separate injection and separate production of well groups according to an embodiment of the present invention;
fig. 3B is a schematic structural diagram of a first determining module according to an embodiment of the present invention;
fig. 3C is a schematic structural diagram of a first determining unit according to an embodiment of the present invention;
fig. 3D is a schematic structural diagram of a second determining module according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 is a flow chart of a method for calculating fluid production rates of intervals of a layered production well for well group synchronous separate injection and separate production according to an embodiment of the present invention. Referring to fig. 1, the method includes:
step 101: and determining a splitting coefficient of the layered oil production well on a target interval in the direction of the layered water injection well for each layered water injection well of the layered water injection wells communicated with the layered oil production well, wherein the splitting coefficient is used for indicating the relative splitting capacity of the layered oil production well on the target interval for the water injection quantity of the layered water injection well, and the target interval is any one of the multiple intervals communicated between the layered oil production well and the layered water injection well.
Step 102: and determining the liquid yield of the layered oil production well on the target interval in the direction of the layered water injection well within a specified time period based on the splitting coefficient of the layered oil production well on the target interval in the direction of the layered water injection well.
Step 103: and determining a direction proportionality coefficient of the layered oil production well on the target interval in the direction of the layered water injection well based on the liquid production capacity of the layered oil production well on the target interval in the direction of the layered water injection well in a specified time period, wherein the direction proportionality coefficient is the proportion of the liquid production capacity of the layered oil production well on the target interval in the direction of the layered water injection well in the whole well, and the whole well liquid production capacity is the total liquid production capacity of the layered oil production well.
Step 104: and determining a liquid production profile coefficient of the layered oil production well on the target interval based on a directional proportion coefficient of the layered oil production well on the target interval in the direction of the layered water injection well, wherein the liquid production profile coefficient is the proportion of the liquid production amount of the layered oil production well on the target interval to the liquid production amount of the whole well.
In the embodiment of the invention, for each layered production well in a plurality of layered production wells and for each layered water injection well in a plurality of layered water injection wells communicated with the layered production wells, the splitting coefficient of the layered production well on a target interval in the direction of the layered water injection well is determined, determining the liquid production amount of the layered oil production well on the target interval in the direction of the layered water injection well in a specified time period based on the splitting coefficient of the layered oil production well on the target interval in the direction of the layered water injection well, determining the directional proportionality coefficient of the layered oil production well on the target interval in the direction of the layered water injection well in the specified time period based on the liquid production amount of the layered oil production well on the target interval in the direction of the layered water injection well, and then, and determining the liquid production profile coefficient of the layered oil production well on the target interval based on the directional proportion coefficient of the layered oil production well on the target interval in the direction of the layered water injection well. Because the liquid production profile coefficient of the layered oil production well on the target interval can be used for determining the injection allocation amount of the layered water injection well and the yield allocation amount of the layered oil production well, and the injection allocation amount and the yield allocation amount can be used for adjusting the separate injection and separate production scheme, the determination of the liquid production profile coefficient of the layered oil production well on the target interval can provide a basis for the adjustment of the subsequent separate injection and separate production scheme, and therefore the accuracy of the separate injection and separate production scheme can be improved.
Optionally, determining the splitting number of the layered oil production well in the direction of the layered water injection well on the target interval comprises:
obtaining a splitting condition value, wherein the splitting condition value is used for indicating the splitting capacity of the layered oil production well on the water injection quantity of the layered water injection well on the target interval;
determining a splitting coefficient of a layered oil production well on the target interval in the direction of a layered water injection well according to a first specified formula based on the splitting condition value;
the first specified formula is:
wherein, CjikThe splitting coefficient of a k layered oil production well on a j layer section in the direction of an i layered water injection well is set, the j layer section is a target layer section, the k layered oil production well is a layered oil production well, the i layered water injection well is a layered water injection well, and X is setjikFor cleavage Condition value, miThe total number of the layered oil production wells communicated with the i layered water injection well through the j interval is represented by pi which is the circumferential rate and e which is the base number of the natural logarithm.
Optionally, obtaining a split condition value comprises:
acquiring a plurality of first calculation parameters, wherein the plurality of first calculation parameters comprise an average formation coefficient between a layered water injection well and a layered water production well, a bottom hole flowing pressure of the layered water injection well, a bottom hole flowing pressure of the layered water production well, an injected water viscosity of the layered water injection well, a communication condition coefficient between the layered water production well and the layered water injection well on a target interval, a measure transformation coefficient of the layered water production well on the target interval, a production thickness coefficient of the layered water production well, a permeability range coefficient of the layered water production well on the target interval, a permeability of the layered water injection well in the direction of the layered water production well on the target interval, an average permeability of the layered water injection well on the target interval, a position coefficient between the layered water production well and the layered water injection well, and a well spacing between the layered water production well and the layered water injection well;
determining a splitting condition value according to a second specified formula as follows based on the plurality of first calculation parameters;
the second specified formula is:
wherein, Δ KjikIs the average formation coefficient between the i-layer water injection well and the k-layer oil production well, PwiFor i bottom hole flow pressure of separate injection well, PwkIs the bottom hole flowing pressure of the k-layer oil production well, mu is the viscosity of the injection water of the i-layer water injection well, and delta ZjikThe coefficient of communication condition between the k-layer oil production well on the j-layer and the i-layer water injection well, MjkTransformation factor for the measures of the k-zone production well in the j-zone interval, EjkIs the production thickness coefficient, G, of a k-zone production welljkFor permeability range coefficient of k-zone producing wells over j interval, βjikThe permeability of the i layered water injection well on the j layer section in the direction of the k layered oil production well,average Permeability over j intervals for i-zone injection wells, αjikIs the position coefficient between the k-zone production well and the i-zone injection well, djikThe well spacing between the k-layer oil production well and the i-layer water injection well is shown.
Optionally, determining, based on a splitting coefficient of the stratified oil production well in the direction of the stratified water injection well on the target interval, a liquid production rate of the stratified oil production well in the direction of the stratified water injection well in a specified time period on the target interval, including:
acquiring a plurality of second calculation parameters, wherein the plurality of second calculation parameters comprise water injection amount of the layered water injection well on the target interval in a specified time period, comprehensive elastic compression coefficient of the layered oil production well on the target interval, rock appearance volume of the layered water injection well on the target interval, and formation pressure change value of the layered water injection well in a target interval control area;
determining the liquid production amount of the layered oil production well on the target interval in the direction of the layered water injection well in a specified time period through a third specified formula based on the plurality of second calculation parameters and the splitting coefficient of the layered oil production well on the target interval in the direction of the layered water injection well;
the third specified formula is:
wherein Q isLjikThe liquid production amount of the k-layer oil production well on the j-layer section in the direction of the i-layer water injection well in a specified time period, QiwjiThe water injection quantity of the i-layer water injection well on the j-layer section in a specified time period CtFor the comprehensive elastic compression coefficient, V, of the k-layer oil production well on the j-layer sectionjiFor the apparent volume of rock, Δ P, of the i-zone injection well in the j-zonejiFor the formation pressure variation value of i-layer water injection well in j-layer control area, CjikAnd the splitting coefficient of the k-layer oil production well on the j-layer section in the direction of the i-layer water injection well is shown.
Optionally, determining a directional proportionality coefficient of the stratified oil production well in the direction of the stratified water injection well in the target interval based on the liquid production rate of the stratified oil production well in the direction of the stratified water injection well in the specified time period in the target interval, including:
determining a direction proportionality coefficient of the layered oil production well on the target interval in the direction of the layered water injection well through a fourth specified formula based on the liquid production amount of the layered oil production well on the target interval in the direction of the layered water injection well in a specified time period;
the fourth specified formula is:
wherein R ispjikIs the direction proportionality coefficient of the k-layer oil production well on the j-layer section in the direction of the i-layer water injection well, QLjikAnd (3) the liquid production amount of the k layered oil production well on the j layer in the direction of the i layered water injection well in a specified time period is represented, n is the total number of the layered water injection wells communicated with the k layered oil production well, and m is the total number of the layers included in the k layered oil production well.
Optionally, determining a fluid production profile coefficient of the stratified oil production well on the target interval based on a directional proportionality coefficient of the stratified oil production well on the target interval in the direction of the stratified water injection well, including:
determining the liquid production profile coefficient of the layered oil production well on the target interval through a fifth specified formula based on the directional proportion coefficient of the layered oil production well on the target interval in the direction of the layered water injection well;
the fifth specified formula is:
wherein R ispjkIs the fluid production profile coefficient, R, of the k-zone production well on the j-zonepjikIs the direction proportionality coefficient of the k layered oil production well on the j layer section in the direction of the i layered water injection well, nkThe total number of the layered water injection wells communicated with the k layered oil production well through the j layer section.
All the above optional technical solutions can be combined arbitrarily to form an optional embodiment of the present invention, which is not described in detail herein.
Fig. 2 is a flow chart of a method for calculating the fluid production capacity of each interval of a layered production well for well group synchronous separate injection and separate production according to an embodiment of the present invention. Referring to fig. 2, the method includes:
step 201: and for each layered oil production well in the plurality of layered oil production wells and each layered water injection well in the plurality of layered water injection wells communicated with the layered oil production wells, determining a splitting coefficient of the layered oil production well in the direction of the layered water injection well on a target interval, wherein the target interval is any one of the plurality of intervals communicated between the layered oil production well and the layered water injection well.
It should be noted that the splitting number is used to indicate the relative splitting capability of the stratified oil production well to the water injection amount of the stratified water injection well in the target interval, and the splitting number may be expressed by a ratio of the water amount flowing from the stratified water injection well to the stratified oil production well in the target interval to the total water injection amount of the stratified water injection well in the target interval, which is not specifically limited in the embodiment of the present invention.
In addition, the method for calculating the liquid production capacity of each interval of the stratified oil production well for synchronous separate injection and separate production of well groups provided by the embodiment of the invention can be applied to electronic equipment, such as a computer, and the embodiment of the invention is not particularly limited to this.
Specifically, when a splitting coefficient of the layered oil production well in the direction of the layered water injection well on the target interval is determined, a splitting condition value can be obtained, wherein the splitting condition value is used for indicating the splitting capacity of the layered oil production well on the target interval for the water injection amount of the layered water injection well; determining a splitting coefficient of the layered oil production well on the target interval in the direction of the layered water injection well according to a first specified formula based on the splitting condition value;
the first specified formula is:
wherein, CjikThe splitting coefficient of a k layered oil production well on a j layer section in the direction of an i layered water injection well, the j layer section is a target layer section, the k layered oil production well is the layered oil production well, the i layered water injection well is the layered water injection well, and X isjikFor the value of the splitting condition, miThe total number of the layered oil production wells communicated with the i layered water injection well through the j interval is represented by pi which is the circumferential rate and e which is the base number of the natural logarithm.
Due to XjikUsed for indicating the splitting capability of the k-layer oil production well on the j-layer section to the water injection quantity of the i-layer water injection well,for indicating the total split capability of all the stratified production wells communicating with the i-stratified injection well through the j-interval on the j-interval for the injection of water to the i-stratified injection well, and, therefore,may be used to indicate the relative split capability of the k-zone producing well over the j-interval to the injection volume of the i-zone injection well, that is,can be used for indicating the splitting coefficient of the k-layer oil production well on the j-layer section in the direction of the i-layer water injection well.
Wherein (pi)0.618-1)(e0.382+e-0.618-1) is a first correction factor for improving the accuracy of the first specified formula.
It should be noted that, in the embodiment of the present invention, a manner of determining the splitting coefficient of the layered production well in the direction of the layered water injection well in the target interval by using the first specified formula is only used as an example for description, in practical applications, the splitting coefficient of the layered production well in the direction of the layered water injection well in the target interval may also be determined by using other manners, which is not specifically limited in the embodiment of the present invention.
Wherein, when obtaining the splitting condition value, a plurality of first calculation parameters can be obtained, the plurality of first calculation parameters comprise an average formation coefficient between the layered water injection well and the layered water injection well, a bottom hole flowing pressure of the layered water injection well, an injected water viscosity of the layered water injection well, a communication condition coefficient between the layered water injection well and the layered water injection well on a target interval, a measure transformation coefficient of the layered water injection well on the target interval, a production thickness coefficient of the layered water injection well, a permeability range coefficient of the layered water injection well on the target interval, a permeability of the layered water injection well in the direction of the layered water injection well on the target interval, an average permeability of the layered water injection well on the target interval, a position coefficient between the layered water injection well and the layered water injection well, and a well distance between the layered water injection well and the layered water injection well; determining the split condition value according to a second prescribed formula as follows based on the plurality of first calculation parameters;
the second specified formula is:
wherein, Δ KjikIs the average formation coefficient between the i-layer water injection well and the k-layer oil production well, PwiFor i bottom hole flow pressure of separate injection well, PwkIs the bottom hole flowing pressure of the k-layer oil production well, mu is the viscosity of the injection water of the i-layer water injection well, and delta ZjikThe coefficient of communication condition between the k-layer oil production well on the j-layer and the i-layer water injection well, MjkTransformation factor for the measures of the k-zone production well in the j-zone interval, EjkIs the production thickness coefficient, G, of a k-zone production welljkFor permeability range coefficient of k-zone producing wells over j interval, βjikThe permeability of the i layered water injection well on the j layer section in the direction of the k layered oil production well,average Permeability over j intervals for i-zone injection wells, αjikIs the position coefficient between the k-zone production well and the i-zone injection well, djikThe well spacing between the k-layer oil production well and the i-layer water injection well is shown.
Wherein,and 2 (pi)0.618-e0.382+1) is a second correction factor used to improve the accuracy of the second specified formula.
In addition,. DELTA.Kjik、ΔZjik、Mjk、Ejk、Gjk、βjik、αjikAnd djikCan be determined according to geological development scheme, PwiAnd PwkThe μmay be determined by well logging, and μmay be obtained by experiment, which is not particularly limited in the embodiment of the present invention. The geological open scheme is used for guiding the development of an oil reservoir, and the logging is a method for measuring geophysical parameters by utilizing the geophysical characteristics such as electrochemical characteristics, conductive characteristics, acoustic characteristics, radioactivity and the like of rock strata.
Furthermore, Kjik、Pwi、Pwk、μ、ΔZjik、Mjk、Ejk、Gjk、βjik、αjikAnd djikThe related art may also be referred to for the acquisition process, which is not described in detail in the embodiments of the present invention.
It should be noted that, in the embodiment of the present invention, a manner of obtaining the split condition value through the second specified formula is only taken as an example for description, and in practical applications, the split condition value may also be obtained through other manners, which is not specifically limited in the embodiment of the present invention.
Step 202: and determining the liquid production amount of the layered oil production well on the target interval in the direction of the layered water injection well in a specified time period based on the split coefficient of the layered oil production well on the target interval in the direction of the layered water injection well.
Specifically, a plurality of second calculation parameters are obtained, wherein the plurality of second calculation parameters comprise the water injection amount of the stratified water injection well in a specified time period on a target interval, the comprehensive elastic compression coefficient of the stratified oil production well on the target interval, the rock appearance volume of the stratified water injection well on the target interval, and the formation pressure change value of the stratified water injection well in a target interval control area; determining the liquid production amount of the layered oil production well on the target interval in the direction of the layered water injection well in a specified time period through a third specified formula based on the plurality of second calculation parameters and the splitting coefficient of the layered oil production well on the target interval in the direction of the layered water injection well;
the third specified formula is:
wherein Q isLjikI layered water injection well for k layered oil production well on j layer section in designated time periodAmount of fluid produced in the direction, QiwjiThe water injection quantity of the i-layer water injection well on the j-layer section in a specified time period CtFor the comprehensive elastic compression coefficient, V, of the k-layer oil production well on the j-layer sectionjiFor the apparent volume of rock, Δ P, of the i-zone injection well in the j-zonejiFor the formation pressure variation value of i-layer water injection well in j-layer control area, CjikAnd the splitting coefficient of the k-layer oil production well on the j-layer section in the direction of the i-layer water injection well is shown.
Wherein,the third correction coefficient is used to improve the accuracy of the third prescribed formula.
In addition, QiwjiCan be determined according to historical production data, Ct、VjiAnd Δ PjiThe method and the device can be determined according to geological development schemes, and the method and the device are not particularly limited in this respect.
Further, Qiwji、Ct、VjiAnd Δ PjiThe related art may also be referred to for the acquisition process, which is not described in detail in the embodiments of the present invention.
It should be noted that, in the embodiment of the present invention, a manner of determining, based on the splitting coefficient of the stratified oil production well in the direction of the stratified water injection well on the target interval, the liquid production rate of the stratified oil production well in the direction of the stratified water injection well in the target interval within a specified time period through a third specified formula is taken as an example for description, in practical applications, the liquid production rate of the stratified oil production well in the direction of the stratified water injection well on the target interval may also be determined in other manners based on the splitting coefficient of the stratified oil production well in the direction of the stratified water injection well on the target interval, and this is not specifically limited in the embodiment of the present invention.
Step 203: and determining a directional proportionality coefficient of the layered oil production well on the target interval in the direction of the layered water injection well based on the liquid yield of the layered oil production well on the target interval in the direction of the layered water injection well within a specified time period, wherein the directional proportionality coefficient is the proportion of the liquid yield of the layered oil production well on the target interval in the direction of the layered water injection well to the liquid yield of the whole well, and the liquid yield of the whole well is the total liquid yield of the layered oil production well.
Specifically, based on the liquid production amount of the layered oil production well in the direction of the layered water injection well in a specified time period on the target interval, determining the direction proportionality coefficient of the layered oil production well in the direction of the layered water injection well on the target interval through a fourth specified formula;
the fourth specified formula is:
wherein R ispjikIs the direction proportionality coefficient of the k-layer oil production well on the j-layer section in the direction of the i-layer water injection well, QLjikAnd (3) the liquid production amount of the k layered oil production well on the j layer in the direction of the i layered water injection well in a specified time period is represented, n is the total number of the layered water injection wells communicated with the k layered oil production well, and m is the total number of the layers included in the k layered oil production well.
Due to QLjikThe liquid production rate of the k-layer oil production well on the j-layer section in the direction of the i-layer water injection well in a specified time period is determined,is the total fluid production volume of the k-zone production well, and therefore,can be used for indicating the proportion of the liquid production volume of the k-layer oil production well in the direction of the i-layer water injection well on the j-layer section to the total liquid production volume of the k-layer oil production well, namely,can be used for indicating the directional proportionality coefficient of the k-layer oil production well in the direction of the i-layer water injection well on the j-layer section.
Wherein，The fourth correction coefficient is used to improve the accuracy of the fourth specified formula.
It should be noted that, in the embodiment of the present invention, a description is given only by taking as an example a manner of determining, based on the liquid production amount of the stratified oil production well in the direction of the stratified water injection well in the specified time period on the target interval, the directional scaling factor of the stratified oil production well in the direction of the stratified water injection well in the target interval by using a fourth specified formula, in practical applications, the directional scaling factor of the stratified oil production well in the direction of the stratified water injection well in the target interval may also be determined by using other manners based on the liquid production amount of the stratified oil production well in the specified time period on the target interval, which is not specifically limited in the embodiment of the present invention.
Step 204: and determining a liquid production profile coefficient of the layered oil production well on the target interval based on a directional proportion coefficient of the layered oil production well on the target interval in the direction of the layered water injection well, wherein the liquid production profile coefficient is the proportion of the liquid production amount of the layered oil production well on the target interval to the liquid production amount of the whole well.
Specifically, based on the directional proportionality coefficient of the layered oil production well in the direction of the layered water injection well on the target interval, the liquid production profile coefficient of the layered oil production well on the target interval is determined through a fifth specified formula;
the fifth specified formula is:
wherein R ispjkIs the fluid production profile coefficient, R, of the k-zone production well on the j-zonepjikIs the direction proportionality coefficient of the k layered oil production well on the j layer section in the direction of the i layered water injection well, nkThe total number of the layered water injection wells communicated with the k layered oil production well through the j layer section.
Since n iskThe total number of the layered water injection wells communicated with the k layered oil production well through the j-layer section is adopted, therefore,the liquid production capacity of the k-layer oil production well in the j-layer section accounts for the proportion of the total liquid production capacity of the k-layer oil production well, namely,and the liquid production section coefficient of the k-layer oil production well on the j interval is shown.
It should be noted that, in the embodiment of the present invention, a description is given only by taking a mode of determining the fluid production profile coefficient of the stratified oil production well in the target interval through a fifth specified formula based on the directional proportionality coefficient of the stratified oil production well in the direction of the stratified water injection well in the target interval as an example, in practical applications, the fluid production profile coefficient of the stratified oil production well in the target interval may also be determined through other modes based on the directional proportionality coefficient of the stratified oil production well in the direction of the stratified water injection well in the target interval, which is not specifically limited in the embodiment of the present invention.
In addition, after the fluid production profile coefficient of the layered oil production well on the target interval is determined, the fluid production capacity of the layered oil production well on the target interval can be determined according to the fluid production profile coefficient, the water injection quantity of the layered water injection well on the target interval is determined according to the fluid production capacity of the layered oil production well on the target interval based on the communication relation between the layered oil production well and the layered water injection well, the injection allocation quantity of the layered water injection well and the production allocation quantity of the layered oil production well are determined based on the water injection quantity and the fluid production capacity, and the separate injection and separate production scheme can be adjusted based on the injection allocation quantity and the production allocation quantity, so that the accuracy of the separate injection and separate production scheme is improved.
In the embodiment of the invention, for each layered production well in a plurality of layered production wells and for each layered water injection well in a plurality of layered water injection wells communicated with the layered production wells, the splitting coefficient of the layered production well on a target interval in the direction of the layered water injection well is determined, determining the liquid production amount of the layered oil production well on the target interval in the direction of the layered water injection well in a specified time period based on the splitting coefficient of the layered oil production well on the target interval in the direction of the layered water injection well, determining the directional proportionality coefficient of the layered oil production well on the target interval in the direction of the layered water injection well in the specified time period based on the liquid production amount of the layered oil production well on the target interval in the direction of the layered water injection well, and then, and determining the liquid production profile coefficient of the layered oil production well on the target interval based on the directional proportion coefficient of the layered oil production well on the target interval in the direction of the layered water injection well. Because the liquid production profile coefficient of the layered oil production well on the target interval can be used for determining the injection allocation amount of the layered water injection well and the yield allocation amount of the layered oil production well, and the injection allocation amount and the yield allocation amount can be used for adjusting the separate injection and separate production scheme, the determination of the liquid production profile coefficient of the layered oil production well on the target interval can provide a basis for the adjustment of the subsequent separate injection and separate production scheme, and therefore the accuracy of the separate injection and separate production scheme can be improved.
Referring to fig. 3A, an embodiment of the present invention provides a device for calculating fluid production amounts of each interval of a layered production well for synchronous separate injection and separate production of well groups, where the device includes:
the first determining module 301 is configured to determine, for each of the multiple layered oil production wells and for each of the multiple layered water injection wells communicated with the layered oil production well, a splitting coefficient of the layered oil production well in the direction of the layered water injection well on the target interval, where the splitting coefficient is used to indicate a relative splitting capability of the layered oil production well on the target interval for the water injection amount of the layered water injection well, and the target interval is any one of the multiple intervals communicated between the layered oil production well and the layered water injection well;
a second determining module 302, configured to determine, based on a splitting coefficient of the layered production well in the layered water injection well direction on the target interval, a liquid production amount of the layered production well in the layered water injection well direction in a specified time period on the target interval;
a third determining module 303, configured to determine a directional proportionality coefficient of the stratified oil production well in the direction of the stratified water injection well on the target interval based on the liquid production amounts of the stratified oil production wells on the target interval in the direction of the stratified water injection well in a specified time period, where the directional proportionality coefficient is a ratio of the liquid production amounts of the stratified oil production wells on the target interval in the direction of the stratified water injection well to the liquid production amount of the whole well, and the liquid production amount of the whole well is a total liquid production amount of the stratified oil production wells;
the fourth determining module 304 is configured to determine a fluid production profile coefficient of the stratified oil production well on the target interval based on a directional proportionality coefficient of the stratified oil production well on the target interval in the direction of the stratified water injection well, where the fluid production profile coefficient is a proportion of a fluid production amount of the stratified oil production well on the target interval to a fluid production amount of the whole well.
Optionally, referring to fig. 3B, the first determining module 301 includes:
the first obtaining unit 3011 is configured to obtain a splitting condition value, where the splitting condition value is used to indicate splitting capability of a stratified oil production well on a target interval of a water injection amount of a stratified water injection well;
a first determining unit 3012, configured to determine, based on the splitting condition value, a splitting coefficient of the layered production well in the direction of the layered water injection well on the target interval according to a first specified formula;
the first specified formula is:
wherein, CjikThe splitting coefficient of a k layered oil production well on a j layer section in the direction of an i layered water injection well is set, the j layer section is a target layer section, the k layered oil production well is a layered oil production well, the i layered water injection well is a layered water injection well, and X is setjikFor cleavage Condition value, miThe total number of the layered oil production wells communicated with the i layered water injection well through the j interval is represented by pi which is the circumferential rate and e which is the base number of the natural logarithm.
Alternatively, referring to fig. 3C, the first obtaining unit 3011 includes:
the obtaining subunit 30111 is configured to obtain a plurality of first calculation parameters, where the plurality of first calculation parameters include an average formation coefficient between the layered water injection well and the layered water production well, a bottom-hole flow pressure of the layered water injection well, a bottom-hole flow pressure of the layered water production well, an injection water viscosity of the layered water injection well, a communication condition coefficient between the layered water production well and the layered water injection well in a target interval, a measure modification coefficient of the layered water production well in the target interval, a production thickness coefficient of the layered water production well, a permeability range coefficient of the layered water production well in the target interval, a permeability of the layered water injection well in the direction of the layered water production well in the target interval, an average permeability of the layered water injection well in the target interval, a position coefficient between the layered water production well and the layered water injection well, and a well spacing between the layered water production well and the layered water injection well;
a determining subunit 30112, configured to determine a splitting condition value according to a second specified formula as follows based on the plurality of first calculation parameters;
the second specified formula is:
wherein, Δ KjikIs the average formation coefficient between the i-layer water injection well and the k-layer oil production well, PwiFor i bottom hole flow pressure of separate injection well, PwkIs the bottom hole flowing pressure of the k-layer oil production well, mu is the viscosity of the injection water of the i-layer water injection well, and delta ZjikThe coefficient of communication condition between the k-layer oil production well on the j-layer and the i-layer water injection well, MjkTransformation factor for the measures of the k-zone production well in the j-zone interval, EjkIs the production thickness coefficient, G, of a k-zone production welljkFor permeability range coefficient of k-zone producing wells over j interval, βMLThe permeability of the i layered water injection well on the j layer section in the direction of the k layered oil production well,for i layered water injection wellAverage permeability over j intervals, αMLIs the position coefficient between the k-zone production well and the i-zone injection well, djikThe well spacing between the k-layer oil production well and the i-layer water injection well is shown.
Optionally, referring to fig. 3D, the second determining module 302 includes:
a second obtaining unit 3021, configured to obtain a plurality of second calculation parameters, where the plurality of second calculation parameters include a water injection amount of the stratified water injection well in a specified time period on the target interval, a comprehensive elastic compression coefficient of the stratified oil production well on the target interval, a rock exterior volume of the stratified water injection well on the target interval, and a formation pressure change value of the stratified water injection well in a target interval control area;
a second determining unit 3022, configured to determine, based on the plurality of second calculation parameters and the split coefficient of the stratified oil production well in the target interval in the direction of the stratified water injection well, a liquid production amount of the stratified oil production well in the target interval in the direction of the stratified water injection well in a specified time period by using a third specified formula;
the third specified formula is:
wherein Q isLjikThe liquid production amount of the k-layer oil production well on the j-layer section in the direction of the i-layer water injection well in a specified time period, QiwjiThe water injection quantity of the i-layer water injection well on the j-layer section in a specified time period CtFor the comprehensive elastic compression coefficient, V, of the k-layer oil production well on the j-layer sectionjiFor the apparent volume of rock, Δ P, of the i-zone injection well in the j-zonejiFor the formation pressure variation value of i-layer water injection well in j-layer control area, CjikAnd the splitting coefficient of the k-layer oil production well on the j-layer section in the direction of the i-layer water injection well is shown.
Optionally, the third determining module 303 includes:
the third determination unit is used for determining a direction proportionality coefficient of the layered oil production well on the target interval in the direction of the layered water injection well through a fourth specified formula based on the liquid production amount of the layered oil production well on the target interval in the specified time period in the direction of the layered water injection well;
the fourth specified formula is:
wherein R ispjikIs the direction proportionality coefficient of the k-layer oil production well on the j-layer section in the direction of the i-layer water injection well, QLjikAnd (3) the liquid production amount of the k layered oil production well on the j layer in the direction of the i layered water injection well in a specified time period is represented, n is the total number of the layered water injection wells communicated with the k layered oil production well, and m is the total number of the layers included in the k layered oil production well.
Optionally, the fourth determining module 304 includes:
the fourth determination unit is used for determining the liquid production profile coefficient of the layered oil production well on the target interval through a fifth specified formula based on the directional proportionality coefficient of the layered oil production well on the target interval in the direction of the layered water injection well;
the fifth specified formula is:
wherein R ispjkIs the fluid production profile coefficient, R, of the k-zone production well on the j-zonepjikIs the direction proportionality coefficient of the k layered oil production well on the j layer section in the direction of the i layered water injection well, nkThe total number of the layered water injection wells communicated with the k layered oil production well through the j layer section.
In the embodiment of the invention, for each layered production well in a plurality of layered production wells and for each layered water injection well in a plurality of layered water injection wells communicated with the layered production wells, the splitting coefficient of the layered production well on a target interval in the direction of the layered water injection well is determined, determining the liquid production amount of the layered oil production well on the target interval in the direction of the layered water injection well in a specified time period based on the splitting coefficient of the layered oil production well on the target interval in the direction of the layered water injection well, determining the directional proportionality coefficient of the layered oil production well on the target interval in the direction of the layered water injection well in the specified time period based on the liquid production amount of the layered oil production well on the target interval in the direction of the layered water injection well, and then, and determining the liquid production profile coefficient of the layered oil production well on the target interval based on the directional proportion coefficient of the layered oil production well on the target interval in the direction of the layered water injection well. Because the liquid production profile coefficient of the layered oil production well on the target interval can be used for determining the injection allocation amount of the layered water injection well and the yield allocation amount of the layered oil production well, and the injection allocation amount and the yield allocation amount can be used for adjusting the separate injection and separate production scheme, the determination of the liquid production profile coefficient of the layered oil production well on the target interval can provide a basis for the adjustment of the subsequent separate injection and separate production scheme, and therefore the accuracy of the separate injection and separate production scheme can be improved.
It should be noted that: the device for calculating the liquid production capacity of each interval of the stratified oil production well for synchronous separated injection and separated production of well components provided by the embodiment is exemplified by only dividing each functional module when calculating the liquid production capacity of each interval of the stratified oil production well, and in practical application, the function distribution can be completed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules so as to complete all or part of the functions described above. In addition, the device for calculating the liquid production capacity of each layer section of the layered oil production well for the synchronous separate injection and separate production of the well group and the method for calculating the liquid production capacity of each layer section of the layered oil production well for the synchronous separate injection and separate production of the well group provided by the embodiment belong to the same concept, and the specific implementation process is described in the method embodiment and is not described herein again.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (10)

1. A method for calculating the liquid production amount of each interval of a layered oil production well for well group synchronous separate injection and separate production is characterized by comprising the following steps:
for each layered production well of a plurality of layered production wells and for each layered water injection well of a plurality of layered water injection wells communicated with the layered production wells, determining a splitting coefficient of the layered production well in the direction of the layered water injection well on a target interval, wherein the splitting coefficient is used for indicating the relative splitting capacity of the layered production well on the target interval for the water injection quantity of the layered water injection well, and the target interval is any one of a plurality of intervals communicated between the layered production well and the layered water injection well;
determining the liquid production amount of the layered oil production well on the target interval in the direction of the layered water injection well in a specified time period based on the splitting coefficient of the layered oil production well on the target interval in the direction of the layered water injection well;
determining a direction proportionality coefficient of the layered oil production well in the direction of the layered water injection well on the target interval based on the liquid production amounts of the layered oil production well in the direction of the layered water injection well in a specified time period on the target interval, wherein the direction proportionality coefficient is the proportion of the liquid production amount of the layered oil production well in the direction of the layered water injection well on the target interval to the liquid production amount of the whole well, and the liquid production amount of the whole well is the total liquid production amount of the layered oil production well;
and determining a liquid production profile coefficient of the layered oil production well on the target interval based on a direction proportion coefficient of the layered oil production well on the target interval in the direction of the layered water injection well, wherein the liquid production profile coefficient is the proportion of the liquid production of the layered oil production well on the target interval to the liquid production of the whole well.
2. The method of claim 1, wherein the determining the number of splits of the stratified oil production well in the direction of the stratified water injection well over the target interval comprises:
obtaining a splitting condition value, wherein the splitting condition value is used for indicating the splitting capacity of the layered oil production well on the target interval to the water injection quantity of the layered water injection well;
determining a splitting coefficient of the layered oil production well on the target interval in the direction of the layered water injection well according to a first specified formula based on the splitting condition value;
the first specified formula is:
wherein, the CjikThe splitting coefficient of a k layered oil production well on a j interval in the direction of an i layered water injection well is shown, the j interval is the target interval, the k layered oil production well is the layered oil production well, the i layered water injection well is the layered water injection well, and the X isjikFor the cleavage condition value, miThe total number of the layered oil production wells communicated with the i layered water injection well through the j interval is represented by pi which is the circumferential rate and e which is the base number of the natural logarithm.
3. The method of claim 2, wherein the obtaining a split condition value comprises:
obtaining a plurality of first calculation parameters, wherein the plurality of first calculation parameters comprise an average formation coefficient between the layered water injection well and the layered oil production well, a bottom hole flow pressure of the layered water injection well, a bottom hole flow pressure of the layered oil production well, an injection water viscosity of the layered water injection well, a communication condition coefficient between the layered oil production well and the layered water injection well on the target interval, and a measure modification coefficient of the layered oil production well on the target interval, the production thickness coefficient of the layered production well, the permeability range coefficient of the layered production well on the target interval, the permeability of the layered water injection well on the target interval in the direction of the layered production well, the average permeability of the layered water injection well on the target interval, the position coefficient between the layered production well and the layered water injection well and the well spacing between the layered production well and the layered water injection well;
determining the splitting condition value according to a second specified formula as follows based on the plurality of first calculation parameters;
the second specified formula is:
wherein, the △ KjikFor the level between the i-zone water injection well and the k-zone oil production wellMean formation coefficient, PwiFor the bottom hole flow pressure of the i-zone injection well, PwkThe bottom hole flowing pressure of the k-layer oil production well, the mu is the viscosity of the injection water of the i-layer water injection well, and the △ ZjikThe coefficient of the communication condition between the k-layer oil production well on the j-layer section and the i-layer water injection well is shown as MjkA measure improvement factor for the k-zone producing well in the j-zone, EjkIs the production thickness coefficient of the k-zone production well, GjkFor permeability coefficient of the k-zone producing well over the j-interval, βjikFor the permeability of the i-layer water injection well on the j-layer section in the direction of the k-layer oil production well, theFor the average permeability of the i-zone injection well over the j-interval, αjikFor the position coefficient between the k-zone production well and the i-zone injection well, djikAnd the well spacing between the k layered oil production well and the i layered water injection well is defined.
4. The method of claim 1, wherein determining the fluid production rate of the stratified oil production well in the direction of the stratified water injection well over the target interval for a specified period of time based on a split coefficient of the stratified oil production well in the direction of the stratified water injection well over the target interval comprises:
acquiring a plurality of second calculation parameters, wherein the plurality of second calculation parameters comprise water injection quantity of the layered water injection well in a specified time period on the target interval, comprehensive elastic compression coefficient of the layered oil production well on the target interval, rock appearance volume of the layered water injection well on the target interval, and formation pressure change value of the layered water injection well in the target interval control area;
determining the liquid production amount of the layered oil production well on the target interval in the direction of the layered water injection well within a specified time period through a third specified formula based on the plurality of second calculation parameters and the splitting coefficient of the layered oil production well on the target interval in the direction of the layered water injection well;
the third specified formula is:
wherein, Q isLjikThe liquid production rate of the k-layer oil production well on the j-layer section in the direction of the i-layer water injection well in a specified time period is shown, and the Q isiwjiThe water injection quantity of the i-layer water injection well on the j-layer section in a specified time period is shown as CtFor the combined elastic compressibility of the k-zone producing well over the j-zone, VjiThe exterior rock volume of the i-zone injection well in the j-interval, the △ PjiThe formation pressure change value of the i-layer water injection well in the j-layer section control area is shown as CjikAnd the splitting coefficient of the k-layer oil production well on the j-layer section in the direction of the i-layer water injection well is obtained.
5. The method of claim 1, wherein determining the directional scaling factor of the stratified oil production well in the direction of the stratified water injection well over the target interval based on the amount of fluid produced by the stratified oil production well over the target interval in the direction of the stratified water injection well over a specified period of time comprises:
determining a direction proportionality coefficient of the layered production well in the direction of the layered water injection well on the target interval through a fourth specified formula based on the liquid production amount of the layered production well in the direction of the layered water injection well in a specified time period on the target interval;
the fourth specified formula is:
wherein, R ispjikThe direction proportion of the k layered oil production well on the j layer section in the direction of the i layered water injection wellCoefficient of said QLjikAnd the liquid production amount of the k layered oil production well on the j interval in the direction of the i layered water injection well in a specified time period is determined, wherein n is the total number of the layered water injection wells communicated with the k layered oil production well, and m is the total number of the intervals included by the k layered oil production well.
6. The method of claim 1, wherein determining the fluid production profile factor for the stratified oil production well at the target interval based on the directional scaling factor for the stratified oil production well at the target interval in the direction of the stratified water injection well comprises:
determining a liquid production profile coefficient of the layered oil production well on the target interval through a fifth specified formula based on a directional proportion coefficient of the layered oil production well on the target interval in the direction of the layered water injection well;
the fifth specified formula is:
wherein, R ispjkIs the fluid production profile coefficient of the k-layer oil production well on the j-layer section, RpjikThe direction proportionality coefficient of the k layered oil production well on the j layer section in the direction of the i layered water injection well, nkThe total number of the layered water injection wells communicated with the k layered oil production well through the j interval.
7. A well group synchronous separate injection and separate production layered oil production well each layer section liquid production amount calculation device is characterized by comprising:
the system comprises a first determination module, a second determination module and a third determination module, wherein the first determination module is used for determining a splitting coefficient of the layered oil production well in the direction of the layered water injection well on a target interval for each layered water injection well in a plurality of layered oil production wells communicated with the layered oil production wells, the splitting coefficient is used for indicating the relative splitting capacity of the layered oil production wells on the target interval for the water injection quantity of the layered water injection well, and the target interval is any one of a plurality of intervals communicated between the layered oil production wells and the layered water injection wells;
the second determination module is used for determining the liquid production amount of the layered oil production well on the target interval in the direction of the layered water injection well in a specified time period based on the splitting coefficient of the layered oil production well on the target interval in the direction of the layered water injection well;
a third determining module, configured to determine a directional proportionality coefficient of the layered production well in the layered water injection well direction on the target interval based on a liquid yield of the layered production well in the layered water injection well direction within a specified time period on the target interval, where the directional proportionality coefficient is a ratio of the liquid yield of the layered production well in the layered water injection well direction on the target interval to a liquid yield of a whole well, and the liquid yield of the whole well is a total liquid yield of the layered production well;
and the fourth determination module is used for determining a liquid production profile coefficient of the layered oil production well on the target interval based on a direction proportionality coefficient of the layered oil production well on the target interval in the direction of the layered water injection well, wherein the liquid production profile coefficient is the proportion of the liquid production amount of the layered oil production well on the target interval to the liquid production amount of the whole well.
8. The apparatus of claim 7, wherein the first determining module comprises:
the first obtaining unit is used for obtaining a splitting condition value, and the splitting condition value is used for indicating the splitting capacity of the layered oil production well on the target interval to the water injection quantity of the layered water injection well;
a first determining unit, configured to determine, based on the splitting condition value, a splitting coefficient of the layered oil production well in the direction of the layered water injection well in the target interval according to a first specified formula;
the first specified formula is:
wherein, the CjikThe splitting coefficient of a k layered oil production well on a j interval in the direction of an i layered water injection well is shown, the j interval is the target interval, the k layered oil production well is the layered oil production well, the i layered water injection well is the layered water injection well, and the X isjikFor the cleavage condition value, miThe total number of the layered oil production wells communicated with the i layered water injection well through the j interval is represented by pi which is the circumferential rate and e which is the base number of the natural logarithm.
9. The apparatus of claim 8, wherein the first obtaining unit comprises:
an obtaining subunit, configured to obtain a plurality of first calculation parameters, where the plurality of first calculation parameters include an average formation coefficient between the stratified water injection well and the stratified water production well, a bottom hole flow pressure of the stratified water injection well, a bottom hole flow pressure of the stratified water production well, an injection water viscosity of the stratified water injection well, a communication condition coefficient between the stratified water production well and the stratified water injection well in the target interval, a measure modification coefficient of the stratified water production well in the target interval, a production thickness coefficient of the stratified water production well, a permeability range coefficient of the stratified water production well in the target interval, a permeability of the stratified water injection well in the direction of the stratified water production well in the target interval, an average permeability of the stratified water injection well in the target interval, a location coefficient between the stratified water production well and the stratified water injection well, and a well between the stratified water production well and the stratified water injection well Distance;
a determining subunit, configured to determine, based on the plurality of first calculation parameters, the splitting condition value according to a second specified formula as follows;
the second specified formula is:
wherein, the △ KjikIs the average formation coefficient between the i-zone water injection well and the k-zone oil production well, PwiFor the bottom hole flow pressure of the i-zone injection well, PwkThe bottom hole flowing pressure of the k-layer oil production well, the mu is the viscosity of the injection water of the i-layer water injection well, and the △ ZjikThe coefficient of the communication condition between the k-layer oil production well on the j-layer section and the i-layer water injection well is shown as MjkA measure improvement factor for the k-zone producing well in the j-zone, EjkIs the production thickness coefficient of the k-zone production well, GjkFor permeability coefficient of the k-zone producing well over the j-interval, βjikFor the permeability of the i-layer water injection well on the j-layer section in the direction of the k-layer oil production well, theFor the average permeability of the i-zone injection well over the j-interval, αjikFor the position coefficient between the k-zone production well and the i-zone injection well, djikAnd the well spacing between the k layered oil production well and the i layered water injection well is defined.
10. The apparatus of claim 7, wherein the second determining module comprises:
a second obtaining unit, configured to obtain a plurality of second calculation parameters, where the plurality of second calculation parameters include a water injection amount of the stratified water injection well in a specified time period on the target interval, a comprehensive elastic compression coefficient of the stratified oil production well on the target interval, a rock appearance volume of the stratified water injection well on the target interval, and a formation pressure variation value of the stratified water injection well in the target interval control area;
a second determining unit, configured to determine, based on the plurality of second calculation parameters and a split coefficient of the layered production well in the direction of the layered water injection well in the target interval, a liquid production amount of the layered production well in the direction of the layered water injection well in a specified time period in the target interval by using a third specified formula;
the third specified formula is:
wherein, Q isLjikThe liquid production rate of the k-layer oil production well on the j-layer section in the direction of the i-layer water injection well in a specified time period is shown, and the Q isiwjiThe water injection quantity of the i-layer water injection well on the j-layer section in a specified time period is shown as CtFor the combined elastic compressibility of the k-zone producing well over the j-zone, VjiThe exterior rock volume of the i-zone injection well in the j-interval, the △ PjiThe formation pressure change value of the i-layer water injection well in the j-layer section control area is shown as CjikAnd the splitting coefficient of the k-layer oil production well on the j-layer section in the direction of the i-layer water injection well is obtained.
CN201610702596.9A 2016-08-22 2016-08-22 Method and device for calculating liquid production amount of each interval of layered oil production well for synchronous separate injection and separate production of well groups Pending CN106499370A (en)

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