CN112796718A - Method and device for determining profile control of single well - Google Patents
Method and device for determining profile control of single well Download PDFInfo
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Abstract
The invention provides a method and a device for determining profile control of a single well, wherein the method comprises the following steps: acquiring influence parameters of single-well profile control; determining the membership degree of the influence parameters according to a membership degree function and determining the weight vector of the influence parameters according to a fuzzy hierarchical analysis mode; inputting the membership degree and the weight vector to a preset fuzzy comprehensive evaluation model to obtain a comprehensive decision result; and if the comprehensive decision result is greater than a preset threshold value, profile control is carried out on the single well. The method can quantitatively judge the profile control necessity of a single water injection well, further improve the development efficiency of the single water injection well, and provide theoretical support for single well profile control decision.
Description
Technical Field
The invention relates to the technical field of petroleum development, in particular to a method and a device for determining single-well profile control.
Background
The water injection well profile control technology is an important means for stabilizing oil and controlling water of a heterogeneous oil reservoir and improving water flooding sweep efficiency. After the oil field developed by water injection enters a high water cut period, injected water easily flows along a high-permeability part due to the influences of reservoir heterogeneity and stratum fluid fluidity difference, the water driving utilization degree of a low-permeability part is low, and the integral reserve utilization degree of an oil reservoir is seriously influenced. Moreover, after the high-permeability part is washed by injected water for a long time, a water flow dominant channel is gradually formed, and a stratum seepage field is fixed, so that the stratum is low in efficiency or ineffective water circulation is serious, the stratum water storage rate is reduced, and the oil reservoir water drive development effect is seriously influenced. The water injection well profile control technique can force follow-up injected water to change the liquid flow direction through shutoff high permeable formation or macropore, improves hyposmosis layer water uptake when reducing high permeable formation water uptake to reach the purpose that improves the profile of absorbing water, improve the vertical degree of using of water drive.
The current profile control decision method is profile control on the whole block, specifically based on the overall static geological characteristics and dynamic development characteristics of the block. However, the current research on the decision and optimization of profile control of a single water injection well is still few.
Therefore, there is a need for a deterministic way to profile a single water injection well.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a method and a device for determining the profile control of a single water injection well, which can quantitatively judge the profile control necessity of the single water injection well and further improve the development efficiency of the single water injection well.
In order to solve the technical problems, the invention provides the following technical scheme:
in a first aspect, the present invention provides a method for determining a profile of a single well, comprising:
acquiring influence parameters of single-well profile control;
determining the membership degree of the influence parameters according to a membership degree function and determining the weight vector of the influence parameters according to a fuzzy hierarchical analysis mode;
inputting the membership degree and the weight vector to a preset fuzzy comprehensive evaluation model to obtain a comprehensive decision result; the fuzzy comprehensive evaluation model is used for outputting a comprehensive decision result according to the input membership degree and the weight vector;
and if the comprehensive decision result is greater than a preset threshold value, profile control is carried out on the single well.
Further, before the obtaining of the influence parameters of the single-well profile control, the method further includes:
receiving geological data of a water injection single well and exploitation data of the water injection single well;
correspondingly, the obtaining of the influence parameters of the single-well profile control comprises the following steps:
and respectively screening the geological data and the mining data to obtain the influence parameters of single well profile control.
Wherein the influencing parameters include: at least one of water injection pressure, wellhead pressure index, permeability coefficient of variation, water absorption profile coefficient of variation, water absorption index per meter, oil layer communication degree, oil layer utilization degree, average water content of oil well, average water content increase rate of oil well, comprehensive yield decrease rate, residual recoverable reserve of well group and oil extraction speed of residual recovered reserve.
Wherein the membership function comprises: a membership function distributed by a decreasing half rectangle and a membership function distributed by a increasing half rectangle.
Wherein, the determining the membership of the influence parameter according to the membership function includes:
determining the membership degrees corresponding to the water injection pressure, the wellhead pressure index, the oil layer utilization degree and the oil extraction speed of the residual production reserves by adopting a membership degree function distributed in a decreasing semi-rectangle;
and determining the membership degrees corresponding to the permeability coefficient of variation, the coefficient of variation of the water absorption profile, the water absorption index per meter, the oil layer communication degree, the average water content of the oil well, the average water content increase rate of the oil well, the comprehensive yield decrease rate and the residual recoverable reserves of the well group by adopting a membership function distributed in a raised semi-rectangular shape.
Wherein the determining the weight vector of the influence parameter according to the fuzzy hierarchical analysis mode comprises:
constructing a fuzzy judgment matrix by adopting a fuzzy hierarchical analysis mode;
and determining the weight vector of the influence parameter through a fuzzy judgment matrix.
The fuzzy comprehensive evaluation model is determined by adopting a fuzzy comprehensive evaluation mode according to the historical membership and the historical weight vector.
The fuzzy comprehensive evaluation model is determined by adopting a weighted average type function in a fuzzy comprehensive evaluation mode according to the historical membership degree and the historical weight vector.
In a second aspect, the present invention provides a single well profile determination apparatus comprising:
the acquisition unit is used for acquiring the influence parameters of single-well profile control;
the processing unit is used for determining the membership degree of the influence parameters according to a membership degree function and determining the weight vector of the influence parameters according to a fuzzy hierarchical analysis mode;
the comprehensive decision unit is used for inputting the membership degree and the weight vector to a preset fuzzy comprehensive evaluation model to obtain a comprehensive decision result; the fuzzy comprehensive evaluation model is determined by adopting a fuzzy comprehensive evaluation mode according to the historical membership and the historical weight vector;
and the profile control unit is used for performing profile control on the single well if the comprehensive decision result is greater than a preset threshold value.
Further, the method also comprises the following steps:
the receiving unit is used for receiving geological data of the water injection single well and exploitation data of the water injection single well;
correspondingly, the acquiring unit includes:
and the acquisition subunit is used for respectively screening the geological data and the mining data and acquiring the influence parameters of single-well profile control.
Wherein the influencing parameters include: at least one of water injection pressure, wellhead pressure index, permeability coefficient of variation, water absorption profile coefficient of variation, water absorption index per meter, oil layer communication degree, oil layer utilization degree, average water content of oil well, average water content increase rate of oil well, comprehensive yield decrease rate, residual recoverable reserve of well group and oil extraction speed of residual recovered reserve.
Wherein the membership function comprises: a membership function distributed by a decreasing half rectangle and a membership function distributed by a increasing half rectangle.
Wherein the processing unit comprises:
the first processing subunit is used for determining the membership degrees corresponding to the water injection pressure, the wellhead pressure index, the oil layer utilization degree and the oil extraction speed of the residual exploitation reserves by adopting a membership degree function distributed in a decreasing semi-rectangle;
and the second processing subunit is used for determining the respective corresponding membership degrees of the permeability coefficient of variation, the coefficient of variation of the water absorption profile, the water absorption index per meter, the oil layer communication degree, the average water content of the oil well, the average water content increasing rate of the oil well, the comprehensive yield decreasing rate and the residual recoverable reserves of the well group by adopting a membership function distributed in a raised semi-rectangular shape.
Wherein the processing unit comprises:
the matrix subunit is used for constructing a fuzzy judgment matrix in a fuzzy hierarchical analysis mode;
and the weight vector unit is used for determining the weight vector of the influence parameter through a fuzzy judgment matrix.
In a third aspect, the present invention provides an electronic device, comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the steps of the method for determining a single-well profile when executing the program.
In a fourth aspect, the invention provides a computer-readable storage medium having stored thereon a computer program which, when being executed by a processor, carries out the steps of the method of determining a single-well profile.
According to the technical scheme, the method and the device for determining the single-well profile control are characterized in that the influence parameters of the single-well profile control are obtained; determining the membership degree of the influence parameters according to a membership degree function and determining the weight vector of the influence parameters according to a fuzzy hierarchical analysis mode; inputting the membership degree and the weight vector to a preset fuzzy comprehensive evaluation model to obtain a comprehensive decision result; the fuzzy comprehensive evaluation model is used for outputting a comprehensive decision result according to the input membership degree and the weight vector; and if the comprehensive decision result is greater than a preset threshold value, profile control is carried out on the single well, the profile control necessity of the single water injection well can be quantitatively judged, the development efficiency of the single water injection well is further improved, and theoretical support can be provided for single well profile control decision.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a first flowchart of a method for determining a profile of a single well according to an embodiment of the present invention.
Fig. 2 is a pressure drop curve of a water injection well in an embodiment of the method for determining a single well profile according to the present invention.
Fig. 3 is a schematic diagram of a membership function of a semi-rectangular distribution in an embodiment of the determination method for single well profile provided by the invention.
Fig. 4 is a first flowchart of a method for determining a profile of a single well according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a single-well profile control determination method and apparatus in an embodiment of the present invention.
Fig. 6 is a schematic structural diagram of an electronic device in an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides an embodiment of a method for determining single-well profile control, which specifically comprises the following steps of:
s101: acquiring influence parameters of single-well profile control;
in this step, it is necessary to determine an influence parameter that influences the profile control of the single well, and the feasibility of the profile control of the single well is determined by the influence parameter.
It should be noted that the influencing parameters include: at least one of water injection pressure, wellhead pressure index, permeability coefficient of variation, water absorption profile coefficient of variation, water absorption index per meter, oil layer communication degree, oil layer utilization degree, average water content of oil well, average water content increase rate of oil well, comprehensive yield decrease rate, residual recoverable reserve of well group and oil extraction speed of residual recovered reserve.
In this embodiment, the influencing parameters include: water injection pressure, wellhead pressure index, permeability coefficient of variation, water absorption profile coefficient of variation, water absorption index per meter, oil layer communication degree, oil layer utilization degree, average water content of an oil well, average water content increase rate of the oil well, comprehensive yield decrease rate, and oil extraction speed of residual recoverable reserves and residual mining reserves of a well group.
The water injection pressure can reflect the water absorption capacity of the stratum, the lower the water injection pressure is, the higher the water absorption capacity of the stratum is reflected, the higher the possibility that a high-permeability strip or a dominant channel exists in the stratum is, and the greater the necessity of profile control of the water injection well is.
The wellhead Pressure Index (Pressure Index, abbreviated as PI value) is defined as:
wherein PI is wellhead pressure index, MPa; t is shut-in time, min; p (t) is wellhead pressure, MPa.
The PI value of a water injection well is a pressure average value reflecting factors such as reservoir physical properties, fluid properties, well group operating regimes, and the like. As shown in the pressure drop curve of the water injection well in fig. 2, the smaller PI reflects the stronger water absorption capacity of the formation, the higher the possibility of large pore canals or high permeability layers in the formation, and the greater the necessity of profile control.
The permeability coefficient of variation reflects the degree of difference in formation permeability. The stronger the permeability coefficient of variation, the more uneven the flooding by water injection, the more enriched the remaining oil in the low permeability part, and the more necessary the profile control of the water injection well.
The water absorption profile variation coefficient reflects the distribution condition of the relative water absorption capacity of each permeable layer in the longitudinal direction of the water injection well, so that the uneven degree of water washing on the longitudinal profile is more intuitively shown. The greater the non-uniform degree of water absorption, the more serious the single layer intrusion of injected water, and the greater the potential for profile control.
The water absorption index per meter refers to the daily water injection amount of an oil layer with unit effective thickness under unit water injection pressure difference. The larger the water absorption index per meter of the water injection well is, the larger the water absorption intensity of a single well is, and the larger the profile control potential of the single well is.
The oil layer communication degree refers to the corresponding matching relation between the water injection well perforation layer and the surrounding oil well perforation layer. The water injection well and the corresponding production well have better connectivity, which is the premise of ensuring obvious profile control effect. The greater the degree of reservoir connectivity, the more conducive to fully displacing the remaining oil from the enrichment zone during profile control, and therefore the greater the potential for profile control.
The mobility of the oil layer refers to the ratio of the thickness of the oil layer production fluid to the total thickness of the oil layer jet opening. It is an important index for reflecting oil layer exploitation situation and exploitation potential of oil field. The higher the oil layer utilization degree, the larger the water drive reserve, the better the water drive development effect, and the smaller the residual oil abundance, the worse the profile control and excavation effect.
The larger the average water content of the oil well is, the smaller the water storage rate of the stratum is, the more inefficient or ineffective circulation of injected water is, the poorer the water drive development effect is, and the greater the necessity of profile control and potential excavation is.
The average water content rising rate of the oil well is defined as a water content rising value corresponding to 1% of petroleum geological reserves produced by the injection and production well group. The larger the average water content rise rate of the oil well is, the more serious the one-way plunging phenomenon of injected water is, the lower the water drive control degree is, and the larger the potential of profile control is.
The comprehensive yield decreasing rate is the difference between the annual oil production of the new well in the current year and the annual oil production of the last half year after the annual oil production of the new well in the current year is subtracted, and the annual oil production of the last half year is divided. The larger the comprehensive yield reduction rate is, the poorer the water drive development effect is, and the larger the necessity of profile control and potential excavation is.
Profile control requires a certain reserve base, i.e. residual oil recovery potential. Whether the success or failure of the profile control decision needs to fully consider the residual recoverable reserve, the capacity potential and the like of the well group so as to avoid that the water well takes effect obviously when applied on site and the corresponding oil well fails to reach the expected target due to small residual reserve and small capacity. The greater the remaining recoverable reserves of the well group, the greater the necessity for profile control potential.
The remaining recoverable reserve production rate is the ratio of the annual verified oil production to the remaining recoverable reserve at the end of the year. The index comprehensively reflects the oil reservoir development effect under the current development conditions (well pattern type, water injection mode, injection and production strength and the like). The smaller the oil production speed of the residual recoverable reserve is, the poorer the development effect at present is, and the greater the necessity of profile control and excavation.
It will be appreciated that the more influencing parameters that are used in a particular application, the more accurate the determination of the feasibility of a single well profile.
S102: determining the membership degree of the influence parameters according to a membership degree function and determining the weight vector of the influence parameters according to a fuzzy hierarchical analysis mode;
in this step, the membership degree and the weight vector corresponding to the influence parameter need to be determined; and determining the membership degree of the influence parameters according to a membership degree function, and determining the weight vector of the influence parameters according to a fuzzy hierarchical analysis mode.
The membership function μ (X) is a mapping function of the domain of discourse X to [0,1] in practice. The determination of the membership function can make the influence parameters non-dimensionalized, as shown in fig. 3, in this embodiment, the ascending and descending semi-rectangular distributions in the real number domain fuzzy distribution are selected to determine the membership of each evaluation index.
The water injection pressure, the wellhead pressure index, the oil layer utilization degree and the oil extraction speed of the residual exploitation reserves are small, namely the smaller the value is, the more beneficial the profile control is, so that the membership function distributed by a reduced semi-rectangle is adopted to determine the membership corresponding to the water injection pressure, the wellhead pressure index, the oil layer utilization degree and the oil extraction speed of the residual exploitation reserves; and the permeability coefficient of variation, the water absorption profile coefficient of variation, the water absorption index per meter, the degree of connection of the oil layer, the average water content of the oil well, the average water content increase rate of the oil well, the comprehensive yield decrease rate and the residual recoverable reserves of the well group belong to large scale, namely the larger the value is, the more the profile control is facilitated, so that the membership function distributed in a raised semi-rectangular shape is adopted to determine the membership corresponding to each of the permeability coefficient of variation, the water absorption profile coefficient of variation, the water absorption index per meter, the degree of connection of the oil layer, the average water content of the oil well, the average water content increase rate of the oil well, the comprehensive yield decrease rate and the residual recoverable reserves of the well group.
It should be noted that, referring to the membership function of the reduced-half rectangular distribution shown in a in fig. 3, the membership function of the reduced-half rectangular distribution is:
referring to the membership function of the raised semi-rectangular distribution shown as b in fig. 3, the membership function of the raised semi-rectangular distribution is:
wherein eta is a constant, the physical significance of eta is a limit value of the necessity evaluation index, and the eta is determined by the practical experience of profile control on the oilfield site. For a certain necessity evaluation index, a threshold value always exists, and if the threshold value is lower or higher than the threshold value, the water injection well needs to be subjected to profile control treatment. In practical applications, the threshold value may be an average of the respective indices of all well groups in the same development level and the same development phase as the evaluation well group.
In this embodiment, the necessity of profile control of a single water injection well group is determined, and a fuzzy hierarchical analysis (FAHP) method in subjective weighting is used to determine the weight vector of the influence parameter.
When determining the weight vector of the influence parameter according to a fuzzy hierarchical analysis mode, constructing a fuzzy judgment matrix by adopting the fuzzy hierarchical analysis mode; determining a weight vector of the influence parameter through a fuzzy judgment matrix;
the fuzzy judgment matrix in the fuzzy hierarchical analysis represents the relative comparison condition between elements related to one element. For example, for an element C, the element associated with it has x1,x2,…,xnThen, a fuzzy judgment matrix R can be obtained:
wherein n is the number of elements, and r is the elementijDenotes the element x relative to an element CiAnd the element xjAnd the membership degrees have fuzzy relations when compared with each other. In order to be able to quantitatively describe the relative importance between any two elements, it can be processed in a quantitative scale using a scale of 0.1 to 0.9 as shown in Table 1 below.
TABLE 1 quantitative Scale 0.1-0.9 in fuzzy hierarchal analysis
The weight vector omega of the influencing parameter is formediComprises the following steps:
wherein
The smaller a is, the larger the weight difference is, which indicates that the relative importance degree between elements is very important; the larger a, the smaller the difference in weight, indicating that the relative importance between the elements is not very important.
By means of fuzzy hierarchical analysis, the weight vector omega of the influence parameter can be obtained and meets the requirements
In conclusion, by constructing the fuzzy judgment matrix and determining the weight vector of the influence parameter according to the fuzzy judgment matrix, the calculation process is simple and convenient, and the consistency test method of the fuzzy judgment matrix is more scientific, accurate and simple.
S103: inputting the membership degree and the weight vector to a preset fuzzy comprehensive evaluation model to obtain a comprehensive decision result; the fuzzy comprehensive evaluation model is used for outputting a comprehensive decision result according to the input membership degree and the weight vector;
in this step, the fuzzy comprehensive evaluation model is determined by a fuzzy comprehensive evaluation mode according to the historical membership degree and the historical weight vector, and specifically, is determined by a weighted average type function in the fuzzy comprehensive evaluation mode according to the historical membership degree and the historical weight vector.
The fuzzy comprehensive evaluation model comprises the following steps:
F＝ωλT；
wherein, F is a comprehensive decision result, and the fuzzy matrix obtained by processing the influence parameters through the membership function is ω ═ ω { ω }1,ω2,…ωn}, using fuzzy hierarchyThe weight vector obtained by the analysis method is lambda ═ lambda1,λ2,…,λnWhere n is 12 and T is the transpose of the matrix.
S104: and if the comprehensive decision result is greater than a preset threshold value, profile control is carried out on the single well.
In the step, if the comprehensive decision result F is more than 0.5, single-well profile control is required; if the comprehensive decision result F is less than 0.5, the single-well profile control is not needed; and if the comprehensive decision result F is 0.5, determining whether to perform single-well profile control again.
It should be noted that the preset threshold is 0.5, which can be adjusted according to different scenes and requirements, and is less than 1.
As can be seen from the above description, in the method for determining single-well profile control provided by the embodiment of the present invention, the influence parameters of single-well profile control are obtained; determining the membership degree of the influence parameters according to a membership degree function and determining the weight vector of the influence parameters according to a fuzzy hierarchical analysis mode; inputting the membership degree and the weight vector to a preset fuzzy comprehensive evaluation model to obtain a comprehensive decision result; the fuzzy comprehensive evaluation model is used for outputting a comprehensive decision result according to the input membership degree and the weight vector; and if the comprehensive decision result is greater than a preset threshold value, profile control is carried out on the single well, the profile control necessity of the single water injection well can be quantitatively judged, the development efficiency of the single water injection well is further improved, and theoretical support can be provided for single well profile control decision.
In an embodiment of the present invention, referring to fig. 4, step S101 of the method for determining a single-well profile control further includes step S100, which includes the following steps:
s100: receiving geological data of a water injection single well and exploitation data of the water injection single well;
in the step, the influence parameters of the single-well profile control can be simply and quickly obtained through the geological data of the water injection single well and the exploitation data of the water injection single well. And when acquiring the influence parameters of the single-well profile control in the step S101, respectively screening the geological data and the mining data to acquire the influence parameters of the single-well profile control.
From the above description, the embodiment of the invention can simply and quickly acquire the influence parameters of the profile control of the single well according to the geological data and the production data of the water injection single well.
To further illustrate the present solution, the present invention provides a specific example of a method for determining a profile control of a single well, which specifically includes the following contents:
the reservoir A is a monoclinic structure in the east-west direction, the east-west sides of the reservoir are closed by near north-south fault layers, and the reservoir A is divided into four sandstone groups and thirteen small layers in the longitudinal direction. The buried depth of an oil layer is 350-500m, the average effective thickness of the oil reservoir is 13.4m, and the average permeability is 120 multiplied by 10-3μm2Average porosity 22.1%; the viscosity of the formation crude oil is 25, and the density of the formation crude oil is 0.868g/cm3The original formation pressure is 4.4MPa, and the current formation pressure is 4.05 MPa.
The X6 injection-production well group is a one-grid five-point injection-production well group in the oil reservoir. Wherein, X6 well is bet in 8 months in 2005, water is injected into 6 sections of I, II, III, IV, V, VI, etc., 32.5 prescriptions are injected daily at present, and 3.1 ten thousand prescriptions are accumulated. The daily production fluid of the well group rises since 4 months in 2009, the water content rises quickly, the daily oil production drops, and the development potential is poor. 48.1 tons of daily produced liquid of a 5-month well group in 2010, 3 tons of daily produced oil and 93.76 percent of comprehensive water content.
And (3) statistically analyzing profile control necessity evaluation indexes of all injection and production well groups in the same development layer series and the same development stage with the X6 injection and production well group, and taking the average value of all the evaluation indexes as the limit value of the corresponding index, wherein the limit value is shown in Table 2. Meanwhile, a weight vector of 12 necessary influence parameters can be obtained by a fuzzy chromatography analysis method.
TABLE 2X 6 evaluation index limit value and corresponding weight factor for well group profile control necessity
The static geological data, dynamic development data, dynamic monitoring data and the like of the X6 well group are arranged and analyzed, and specific numerical values of 10 indexes in a profile control necessity evaluation index system can be obtained, wherein the specific numerical values are injection pressure, water content increasing rate, comprehensive water content, permeability variation coefficient, oil layer utilization degree, oil reservoir communication degree, water absorption percentage variation coefficient, residual recoverable reserve, yield comprehensive decreasing rate and oil recovery speed of residual recoverable reserve. On the basis of determining the necessity evaluation index limit value, the membership degrees of the 10 evaluation indexes can be obtained by using the rectangular fuzzy distribution, and the corresponding calculation results are shown in table 3.
TABLE 3 membership of evaluation indexes for profile control necessity of X6 well group
According to the fuzzy comprehensive evaluation model in the above embodiment, the comprehensive decision result F of the well group profile control necessity evaluation can be obtained as 0.734>0.5, so that the well group is necessary to perform profile control operation.
The embodiment of the present invention provides a specific implementation manner of a single-well profile control determination apparatus capable of implementing all contents in the single-well profile control determination method, and referring to fig. 5, the single-well profile control determination apparatus specifically includes the following contents:
the acquiring unit 20 is used for acquiring influence parameters of single-well profile control;
the processing unit 30 is configured to determine the membership of the impact parameter according to a membership function and determine a weight vector of the impact parameter according to a fuzzy hierarchy analysis manner;
the comprehensive decision unit 40 is used for inputting the membership degree and the weight vector to a preset fuzzy comprehensive evaluation model to obtain a comprehensive decision result; the fuzzy comprehensive evaluation model is determined by adopting a fuzzy comprehensive evaluation mode according to the historical membership and the historical weight vector;
and the profile control unit 50 is used for performing profile control on the single well if the comprehensive decision result is greater than a preset threshold value.
Further, the method also comprises the following steps:
the receiving unit 10 is used for receiving geological data of the water injection single well and exploitation data of the water injection single well;
correspondingly, the acquiring unit includes:
and the acquisition subunit is used for respectively screening the geological data and the mining data and acquiring the influence parameters of single-well profile control.
Wherein the influencing parameters include: at least one of water injection pressure, wellhead pressure index, permeability coefficient of variation, water absorption profile coefficient of variation, water absorption index per meter, oil layer communication degree, oil layer utilization degree, average water content of oil well, average water content increase rate of oil well, comprehensive yield decrease rate, residual recoverable reserve of well group and oil extraction speed of residual recovered reserve.
Wherein the membership function comprises: a membership function distributed by a decreasing half rectangle and a membership function distributed by a increasing half rectangle.
Wherein the processing unit comprises:
the first processing subunit is used for determining the membership degrees corresponding to the water injection pressure, the wellhead pressure index, the oil layer utilization degree and the oil extraction speed of the residual exploitation reserves by adopting a membership degree function distributed in a decreasing semi-rectangle;
and the second processing subunit is used for determining the respective corresponding membership degrees of the permeability coefficient of variation, the coefficient of variation of the water absorption profile, the water absorption index per meter, the oil layer communication degree, the average water content of the oil well, the average water content increasing rate of the oil well, the comprehensive yield decreasing rate and the residual recoverable reserves of the well group by adopting a membership function distributed in a raised semi-rectangular shape.
Wherein the processing unit comprises:
the matrix subunit is used for constructing a fuzzy judgment matrix in a fuzzy hierarchical analysis mode;
and the weight vector unit is used for determining the weight vector of the influence parameter through a fuzzy judgment matrix.
The fuzzy comprehensive evaluation model is determined by adopting a fuzzy comprehensive evaluation mode according to the historical membership and the historical weight vector. Specifically, the fuzzy comprehensive evaluation model is determined by adopting a weighted average type function in a fuzzy comprehensive evaluation mode according to the historical membership degree and the historical weight vector.
The embodiment of the single-well profile control determination apparatus provided in the present invention may be specifically used for executing the processing procedure of the embodiment of the single-well profile control determination method in the foregoing embodiment, and the functions thereof are not described herein again, and reference may be made to the detailed description of the method embodiment.
As can be seen from the above description, the determining apparatus for single-well profile control provided in the embodiment of the present invention obtains the influence parameters of single-well profile control; determining the membership degree of the influence parameters according to a membership degree function and determining the weight vector of the influence parameters according to a fuzzy hierarchical analysis mode; inputting the membership degree and the weight vector to a preset fuzzy comprehensive evaluation model to obtain a comprehensive decision result; the fuzzy comprehensive evaluation model is used for outputting a comprehensive decision result according to the input membership degree and the weight vector; and if the comprehensive decision result is greater than a preset threshold value, profile control is carried out on the single well, the profile control necessity of the single water injection well can be quantitatively judged, the development efficiency of the single water injection well is further improved, and theoretical support can be provided for single well profile control decision.
The application provides an embodiment of an electronic device for implementing all or part of contents in the method for determining a single-well profile control, where the electronic device specifically includes the following contents:
a processor (processor), a memory (memory), a communication Interface (Communications Interface), and a bus; the processor, the memory and the communication interface complete mutual communication through the bus; the communication interface is used for realizing information transmission between related devices; the electronic device may be a desktop computer, a tablet computer, a mobile terminal, and the like, but the embodiment is not limited thereto. In this embodiment, the electronic device may be implemented with reference to the embodiment of the determining method for implementing single-well profile control and the embodiment of the determining apparatus for implementing single-well profile control, which are incorporated herein, and repeated details are not repeated.
Fig. 6 is a schematic block diagram of a system configuration of an electronic device 9600 according to an embodiment of the present application. As shown in fig. 6, the electronic device 9600 can include a central processor 9100 and a memory 9140; the memory 9140 is coupled to the central processor 9100. Notably, this FIG. 6 is exemplary; other types of structures may also be used in addition to or in place of the structure to implement telecommunications or other functions.
In one embodiment, the determining function of the single well profile may be integrated into the central processor 9100. The central processor 9100 may be configured to control as follows: acquiring influence parameters of single-well profile control; determining the membership degree of the influence parameters according to a membership degree function and determining the weight vector of the influence parameters according to a fuzzy hierarchical analysis mode; inputting the membership degree and the weight vector to a preset fuzzy comprehensive evaluation model to obtain a comprehensive decision result; the fuzzy comprehensive evaluation model is used for outputting a comprehensive decision result according to the input membership degree and the weight vector; and if the comprehensive decision result is greater than a preset threshold value, profile control is carried out on the single well.
As can be seen from the above description, the electronic device provided in the embodiments of the present application obtains the influence parameters of the single-well profile control; determining the membership degree of the influence parameters according to a membership degree function and determining the weight vector of the influence parameters according to a fuzzy hierarchical analysis mode; inputting the membership degree and the weight vector to a preset fuzzy comprehensive evaluation model to obtain a comprehensive decision result; the fuzzy comprehensive evaluation model is used for outputting a comprehensive decision result according to the input membership degree and the weight vector; and if the comprehensive decision result is greater than a preset threshold value, profile control is carried out on the single well, the profile control necessity of the single water injection well can be quantitatively judged, the development efficiency of the single water injection well is further improved, and theoretical support can be provided for single well profile control decision.
In another embodiment, the single-well profile determination apparatus may be configured separately from the central processor 9100, for example, the single-well profile determination apparatus may be configured as a chip connected to the central processor 9100, and the single-well profile determination function may be implemented by the control of the central processor.
As shown in fig. 6, the electronic device 9600 may further include: a communication module 9110, an input unit 9120, an audio processor 9130, a display 9160, and a power supply 9170. It is noted that the electronic device 9600 also does not necessarily include all of the components shown in fig. 6; further, the electronic device 9600 may further include components not shown in fig. 6, which may be referred to in the art.
As shown in fig. 6, a central processor 9100, sometimes referred to as a controller or operational control, can include a microprocessor or other processor device and/or logic device, which central processor 9100 receives input and controls the operation of the various components of the electronic device 9600.
The memory 9140 can be, for example, one or more of a buffer, a flash memory, a hard drive, a removable media, a volatile memory, a non-volatile memory, or other suitable device. The information relating to the failure may be stored, and a program for executing the information may be stored. And the central processing unit 9100 can execute the program stored in the memory 9140 to realize information storage or processing, or the like.
The input unit 9120 provides input to the central processor 9100. The input unit 9120 is, for example, a key or a touch input device. Power supply 9170 is used to provide power to electronic device 9600. The display 9160 is used for displaying display objects such as images and characters. The display may be, for example, an LCD display, but is not limited thereto.
The memory 9140 can be a solid state memory, e.g., Read Only Memory (ROM), Random Access Memory (RAM), a SIM card, or the like. There may also be a memory that holds information even when power is off, can be selectively erased, and is provided with more data, an example of which is sometimes called an EPROM or the like. The memory 9140 could also be some other type of device. Memory 9140 includes a buffer memory 9141 (sometimes referred to as a buffer). The memory 9140 may include an application/function storage portion 9142, the application/function storage portion 9142 being used for storing application programs and function programs or for executing a flow of operations of the electronic device 9600 by the central processor 9100.
The memory 9140 can also include a data store 9143, the data store 9143 being used to store data, such as contacts, digital data, pictures, sounds, and/or any other data used by an electronic device. The driver storage portion 9144 of the memory 9140 may include various drivers for the electronic device for communication functions and/or for performing other functions of the electronic device (e.g., messaging applications, contact book applications, etc.).
The communication module 9110 is a transmitter/receiver 9110 that transmits and receives signals via an antenna 9111. The communication module (transmitter/receiver) 9110 is coupled to the central processor 9100 to provide input signals and receive output signals, which may be the same as in the case of a conventional mobile communication terminal.
Based on different communication technologies, a plurality of communication modules 9110, such as a cellular network module, a bluetooth module, and/or a wireless local area network module, may be provided in the same electronic device. The communication module (transmitter/receiver) 9110 is also coupled to a speaker 9131 and a microphone 9132 via an audio processor 9130 to provide audio output via the speaker 9131 and receive audio input from the microphone 9132, thereby implementing ordinary telecommunications functions. The audio processor 9130 may include any suitable buffers, decoders, amplifiers and so forth. In addition, the audio processor 9130 is also coupled to the central processor 9100, thereby enabling recording locally through the microphone 9132 and enabling locally stored sounds to be played through the speaker 9131.
An embodiment of the present invention further provides a computer-readable storage medium capable of implementing all the steps in the determination method of single well profile control in the above embodiment, where the computer-readable storage medium stores thereon a computer program, and the computer program when executed by a processor implements all the steps of the determination method of single well profile control in the above embodiment, for example, the processor implements the following steps when executing the computer program: acquiring influence parameters of single-well profile control; determining the membership degree of the influence parameters according to a membership degree function and determining the weight vector of the influence parameters according to a fuzzy hierarchical analysis mode; inputting the membership degree and the weight vector to a preset fuzzy comprehensive evaluation model to obtain a comprehensive decision result; the fuzzy comprehensive evaluation model is used for outputting a comprehensive decision result according to the input membership degree and the weight vector; and if the comprehensive decision result is greater than a preset threshold value, profile control is carried out on the single well.
As can be seen from the above description, the computer-readable storage medium provided in the embodiments of the present invention obtains the impact parameters of the single-well profile control; determining the membership degree of the influence parameters according to a membership degree function and determining the weight vector of the influence parameters according to a fuzzy hierarchical analysis mode; inputting the membership degree and the weight vector to a preset fuzzy comprehensive evaluation model to obtain a comprehensive decision result; the fuzzy comprehensive evaluation model is used for outputting a comprehensive decision result according to the input membership degree and the weight vector; and if the comprehensive decision result is greater than a preset threshold value, profile control is carried out on the single well, the profile control necessity of the single water injection well can be quantitatively judged, the development efficiency of the single water injection well is further improved, and theoretical support can be provided for single well profile control decision.
Although the present invention provides method steps as described in the examples or flowcharts, more or fewer steps may be included based on routine or non-inventive labor. The order of steps recited in the embodiments is merely one manner of performing the steps in a multitude of orders and does not represent the only order of execution. When an actual apparatus or client product executes, it may execute sequentially or in parallel (e.g., in the context of parallel processors or multi-threaded processing) according to the embodiments or methods shown in the figures.
As will be appreciated by one skilled in the art, embodiments of the present description may be provided as a method, apparatus (system) or computer program product. Accordingly, embodiments of the present description may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment. In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. The terms "upper", "lower", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention is not limited to any single aspect, nor is it limited to any single embodiment, nor is it limited to any combination and/or permutation of these aspects and/or embodiments. Moreover, each aspect and/or embodiment of the present invention may be utilized alone or in combination with one or more other aspects and/or embodiments thereof.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (16)
1. A method of determining a single well profile, comprising:
acquiring influence parameters of single-well profile control;
determining the membership degree of the influence parameters according to a membership degree function and determining the weight vector of the influence parameters according to a fuzzy hierarchical analysis mode;
inputting the membership degree and the weight vector to a preset fuzzy comprehensive evaluation model to obtain a comprehensive decision result; the fuzzy comprehensive evaluation model is used for outputting a comprehensive decision result according to the input membership degree and the weight vector;
and if the comprehensive decision result is greater than a preset threshold value, profile control is carried out on the single well.
2. The method for determining a single-well profile control according to claim 1, further comprising, before said obtaining influencing parameters of the single-well profile control:
receiving geological data of a water injection single well and exploitation data of the water injection single well;
correspondingly, the obtaining of the influence parameters of the single-well profile control comprises the following steps:
and respectively screening the geological data and the mining data to obtain the influence parameters of single well profile control.
3. The method of determining single well profile control of claim 1, wherein said influencing parameters comprise: at least one of water injection pressure, wellhead pressure index, permeability coefficient of variation, water absorption profile coefficient of variation, water absorption index per meter, oil layer communication degree, oil layer utilization degree, average water content of oil well, average water content increase rate of oil well, comprehensive yield decrease rate, residual recoverable reserve of well group and oil extraction speed of residual recovered reserve.
4. The method of determining a single well profile of claim 3, wherein the membership function comprises: a membership function distributed by a decreasing half rectangle and a membership function distributed by a increasing half rectangle.
5. The method of determining a single well profile according to claim 4, wherein said determining a degree of membership of said influencing parameter according to a degree of membership function comprises:
determining the membership degrees corresponding to the water injection pressure, the wellhead pressure index, the oil layer utilization degree and the oil extraction speed of the residual production reserves by adopting a membership degree function distributed in a decreasing semi-rectangle;
and determining the membership degrees corresponding to the permeability coefficient of variation, the coefficient of variation of the water absorption profile, the water absorption index per meter, the oil layer communication degree, the average water content of the oil well, the average water content increase rate of the oil well, the comprehensive yield decrease rate and the residual recoverable reserves of the well group by adopting a membership function distributed in a raised semi-rectangular shape.
6. The method of determining a single-well profile control according to claim 1, wherein said determining a weight vector of said influencing parameter according to a fuzzy hierarchy analysis comprises:
constructing a fuzzy judgment matrix by adopting a fuzzy hierarchical analysis mode;
and determining the weight vector of the influence parameter through a fuzzy judgment matrix.
7. The method of claim 1, wherein the fuzzy comprehensive evaluation model is determined by a fuzzy comprehensive evaluation method according to historical membership and historical weight vectors.
8. The method of claim 7, wherein the fuzzy comprehensive evaluation model is determined by a weighted average type function in a fuzzy comprehensive evaluation mode according to the historical membership and the historical weight vector.
9. A single well profile determination apparatus, comprising:
the acquisition unit is used for acquiring the influence parameters of single-well profile control;
the processing unit is used for determining the membership degree of the influence parameters according to a membership degree function and determining the weight vector of the influence parameters according to a fuzzy hierarchical analysis mode;
the comprehensive decision unit is used for inputting the membership degree and the weight vector to a preset fuzzy comprehensive evaluation model to obtain a comprehensive decision result; the fuzzy comprehensive evaluation model is determined by adopting a fuzzy comprehensive evaluation mode according to the historical membership and the historical weight vector;
and the profile control unit is used for performing profile control on the single well if the comprehensive decision result is greater than a preset threshold value.
10. The single well profile determination apparatus of claim 9, further comprising:
the receiving unit is used for receiving geological data of the water injection single well and exploitation data of the water injection single well;
correspondingly, the acquiring unit includes:
and the acquisition subunit is used for respectively screening the geological data and the mining data and acquiring the influence parameters of single-well profile control.
11. The single well profile determination apparatus of claim 9, wherein said influencing parameters comprise: at least one of water injection pressure, wellhead pressure index, permeability coefficient of variation, water absorption profile coefficient of variation, water absorption index per meter, oil layer communication degree, oil layer utilization degree, average water content of oil well, average water content increase rate of oil well, comprehensive yield decrease rate, residual recoverable reserve of well group and oil extraction speed of residual recovered reserve.
12. The apparatus for determining a single well profile of claim 11, wherein the membership function comprises: a membership function distributed by a decreasing half rectangle and a membership function distributed by a increasing half rectangle.
13. The single well profile determination apparatus as defined in claim 12, wherein the processing unit comprises:
the first processing subunit is used for determining the membership degrees corresponding to the water injection pressure, the wellhead pressure index, the oil layer utilization degree and the oil extraction speed of the residual exploitation reserves by adopting a membership degree function distributed in a decreasing semi-rectangle;
and the second processing subunit is used for determining the respective corresponding membership degrees of the permeability coefficient of variation, the coefficient of variation of the water absorption profile, the water absorption index per meter, the oil layer communication degree, the average water content of the oil well, the average water content increasing rate of the oil well, the comprehensive yield decreasing rate and the residual recoverable reserves of the well group by adopting a membership function distributed in a raised semi-rectangular shape.
14. The single well profile determination apparatus of claim 9, wherein the processing unit comprises:
the matrix subunit is used for constructing a fuzzy judgment matrix in a fuzzy hierarchical analysis mode;
and the weight vector unit is used for determining the weight vector of the influence parameter through a fuzzy judgment matrix.
15. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the method for determining a single-well profile of any one of claims 1 to 8 when executing said program.
16. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method for determining a single-well profile of any one of claims 1 to 8.
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