A recovery ratio calculation method, system and device based on chemical flooding and encryption synergistic effect and a medium

Abstract

The application relates to the technical field and discloses a recovery ratio calculation method, system, device and medium based on chemical flooding and encryption synergistic effect, which comprehensively considers influencing factors of the chemical flooding and encryption synergistic effect technology in offshore oilfield development, accurately calculates the recovery ratio in the chemical flooding and encryption synergistic effect development process of the offshore oilfield, and provides reliable technical support and decision basis for offshore oilfield development.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oilfield development, and particularly relates to a recovery factor calculation method, system, device and medium based on synergistic effect of chemical flooding and infill. BACKGROUND

[0002] Synergistic effect of chemical flooding and infill to improve recovery factor is one of important means to improve recovery factor of offshore oilfield, and has been widely concerned. Chemical flooding technology realizes expansion of swept volume and improvement of oil displacement efficiency by means of injecting specific chemical agents and optimizing injection parameters, and then improves recovery factor of oil reservoir; infill technology realizes expansion of swept volume by means of optimizing well pattern and water injection scheme, and then improves recovery factor of water flooding stage. However, there are still some problems in application of synergistic effect of chemical flooding and infill in current offshore oilfield. For example, the existing recovery factor calculation method is often based on traditional physical model and empirical formula. For example, some methods directly define swept volume based on reservoir area without giving original swept volume calculation method, and do not consider whether well groups are connected in the area. For example, some methods adopt different empirical formulas to multiply to obtain recovery factor, but the method does not consider the influence of layer division on longitudinal swept volume of the reservoir in the calculation process, and does not fully consider the influence of well pattern conversion and synergistic effect of chemical flooding on swept volume.

[0003] Therefore, a new recovery factor calculation method, system, device and medium based on synergistic effect of chemical flooding and infill are needed to comprehensively consider the influencing factors of synergistic effect of chemical flooding and infill in offshore oilfield development, accurately calculate recovery factor in the development process of synergistic effect of chemical flooding and infill in offshore oilfield, and provide reliable technical support and decision basis for offshore oilfield development. SUMMARY

[0004] The present application provides a recovery factor calculation method, system, device and medium based on synergistic effect of chemical flooding and infill to solve the defect that the existing recovery factor calculation method cannot obtain accurate recovery factor when synergistic effect of chemical flooding and infill is applied to offshore oilfield development.

[0005] The present application provides a recovery factor calculation method based on synergistic effect of chemical flooding and infill, comprising:

[0006] obtaining interwell relationship data, well group feature data, layer feature data and relative permeability data of the to-be-tested well pattern when the synergistic effect of chemical flooding and infill is applied;

[0007] obtaining a planar swept coefficient of the to-be-tested well pattern according to the interwell relationship data and the well group feature data;

[0008] obtaining a longitudinal swept coefficient of the to-be-tested well pattern according to the interwell relationship data and the layer feature data;

[0009] According to the phase permeability data, the oil displacement efficiency of the to-be-tested well pattern is obtained;

[0010] According to the areal sweep efficiency, the longitudinal sweep efficiency and the oil displacement efficiency of the to-be-tested well pattern, the recovery efficiency of the to-be-tested well pattern is obtained.

[0011] According to the present application, a recovery efficiency calculation method based on the synergy of chemical flooding and infill is provided, and the well group feature data includes any one or any combination thereof: well group chemical flooding control degree, mobility ratio, single well water cut before well pattern conversion, injection-production pressure difference, well spacing, initial water cut of new well, cumulative injection volume, cumulative injection volume after well pattern conversion, single well water cut at statistical time node, oil phase viscosity, displacement phase viscosity.

[0012] According to the present application, a recovery efficiency calculation method based on the synergy of chemical flooding and infill is provided, and the areal sweep efficiency of the to-be-tested well pattern is obtained according to the interwell relationship data and the well group feature data, including:

[0013] According to the interwell relationship data and the well group feature data, the areal sweep efficiency of the to-be-tested well pattern is obtained through a first expression, wherein the first expression is:

[0014]

[0015] In the first expression, E AZ represents the areal sweep efficiency of the to-be-tested well pattern; T, a, b, c, d, e, f, A, B, C represent well pattern related coefficients; i represents the well group serial number; λ i represents the well group chemical flooding control degree; M represents the mobility ratio; f bwi represents the single well water cut before well pattern conversion; ΔP i represents the injection-production pressure difference; d i represents the well spacing; f woi represents the initial water cut of new well; W Pi represents the cumulative injection volume; W i represents the cumulative injection volume after well pattern conversion; f awi represents the single well water cut at statistical time node; μ o represents the oil phase viscosity; μ pi represents the displacement phase viscosity.

[0016] According to the present application, a recovery efficiency calculation method based on the synergy of chemical flooding and infill is provided, and the layer series feature data includes any one or any combination thereof: water-oil ratio, well spacing, maximum pseudo resistance coefficient in layer series, minimum pseudo resistance coefficient in layer series, function of reservoir permeability variation coefficient, average value of interwell injection-production pressure difference in layer.

[0017] According to the application, a recovery factor calculation method based on chemical flooding and encryption synergistic effect is provided, and the longitudinal sweep efficiency of the to-be-tested well pattern is obtained according to interwell relationship data and layer series characteristic data, comprising:

[0018] The longitudinal sweep efficiency of the to-be-tested well pattern is obtained according to interwell relationship data and layer series characteristic data through a second expression, wherein the second expression is:

[0019]

[0020] In the second expression, E H represents the longitudinal sweep efficiency of the to-be-tested well pattern; a1, a2, a3, a4, D, E and F represent well pattern related coefficients; j represents a layer series serial number; Y represents an experience coefficient, wherein WOR represents water oil ratio, b1, b2, b3, b4 and b5 represent fitting coefficients, d i represents well spacing; R'' f '' j represents the ratio of the maximum pseudo resistance coefficient to the minimum pseudo resistance coefficient in the layer series; X represents a function of the reservoir permeability variation coefficient, X = b6V 2 +b7V+b8; ΔP ave represents the average value of the interwell injection and production pressure difference in the layer.

[0021] According to the application, a recovery factor calculation method based on chemical flooding and encryption synergistic effect is provided, and the longitudinal sweep efficiency of the to-be-tested well pattern is obtained according to interwell relationship data and layer series characteristic data, comprising:

[0022] According to the application, a recovery factor calculation method based on chemical flooding and encryption synergistic effect is provided, and the longitudinal sweep efficiency of the to-be-tested well pattern is obtained according to interwell relationship data and layer series characteristic data, comprising:

[0023] The longitudinal sweep efficiency of the to-be-tested well pattern is obtained according to interwell relationship data and layer series characteristic data through a second expression, wherein the second expression is:

[0024]

[0025] In the second expression, E d represents the longitudinal sweep efficiency of the to-be-tested well pattern; S wc represents the irreducible water saturation; S or represents the residual oil saturation; w and b represent process parameters, wherein S wf represents the water drive front saturation, f wf represents the water content when the water drive front reaches the outlet end; M represents the corresponding f wThe mobility ratio of the stage, n w The water phase index, n o The oil phase index, f w The water content.

[0026] The application provides a recovery calculation method based on synergy of chemical flooding and encryption, and the recovery of a to-be-tested well pattern is obtained according to a plane sweep coefficient, a longitudinal sweep coefficient and oil displacement efficiency of the to-be-tested well pattern, and the recovery calculation method comprises the following steps:

[0027] The recovery of the to-be-tested well pattern is obtained through a fourth expression according to the plane sweep coefficient, the longitudinal sweep coefficient and the oil displacement efficiency of the to-be-tested well pattern, wherein the fourth expression is as follows:

[0028] E R =E AZ E H E d ,

[0029] In the fourth expression, E R represents the recovery of the to-be-tested well pattern, E AZ represents the plane sweep coefficient of the to-be-tested well pattern, E H represents the longitudinal sweep coefficient of the to-be-tested well pattern, and E d represents the oil displacement efficiency of the to-be-tested well pattern.

[0030] The application further provides a recovery calculation system based on synergy of chemical flooding and encryption, and the recovery calculation system comprises the following steps:

[0031] A data acquisition module is configured to acquire interwell relationship data, well group feature data, layer series feature data and phase permeability data of the to-be-tested well pattern when the to-be-tested well pattern applies the synergy of chemical flooding and encryption;

[0032] A plane sweep coefficient obtaining module is configured to obtain the plane sweep coefficient of the to-be-tested well pattern according to the interwell relationship data and the well group feature data;

[0033] A longitudinal sweep coefficient obtaining module is configured to obtain the longitudinal sweep coefficient of the to-be-tested well pattern according to the interwell relationship data and the layer series feature data;

[0034] An oil displacement efficiency obtaining module is configured to obtain the oil displacement efficiency of the to-be-tested well pattern according to the phase permeability data;

[0035] A recovery obtaining module is configured to obtain the recovery of the to-be-tested well pattern according to the plane sweep coefficient, the longitudinal sweep coefficient and the oil displacement efficiency of the to-be-tested well pattern.

[0036] The application further provides an electronic device comprising a processor and a memory storing a computer program, and the processor implements the recovery calculation method of the synergy of chemical flooding and encryption when executing the computer program.

[0037] The application also provides a non-transitory computer-readable storage medium having stored thereon a computer program, which, when executed by a processor, implements any of the chemical flooding and encryption synergistic enhanced recovery calculation methods described above.

[0038] The application also provides a computer program product, which comprises a computer program that can be stored on a non-transitory computer-readable storage medium, and when the computer program is executed by a processor, the computer can execute any of the chemical flooding and encryption synergistic enhanced recovery calculation methods described above.

[0039] The application provides a chemical flooding and encryption synergistic enhanced recovery calculation method, system, device and medium, which has at least the following advantages:

[0040] (1) The interwell relationship data, well group feature data, layer series feature data and phase permeability data can be directly obtained through oilfield dynamic monitoring, the data source is simple and more real, and the use of feature data that conforms to the actual dynamic change can improve the accuracy of the calculated recovery rate;

[0041] (2) The plane wave and sweep coefficient is calculated by using the well group superposition method, the influence of geological parameters such as interwell connectivity and sand body connectivity on sweep ability is fully considered, and the accuracy of the calculated recovery rate is effectively improved;

[0042] (3) The longitudinal sweep coefficient is calculated by using the interlayer pseudo-permeation resistance coefficient and viscosity ratio, so as to realize the purpose of improving the recovery rate after the adjustment of the layer series by the chemical flooding and encryption synergistic enhancement technology;

[0043] (4) The calculation of oil displacement efficiency comprehensively considers the influence of different chemical flooding methods on the change characteristics of the phase permeability curve, and further improves the accuracy of the calculated recovery rate.

[0044] The application provides a chemical flooding and encryption synergistic enhanced recovery calculation method, system, device and medium, which comprehensively considers the influencing factors of the chemical flooding and encryption synergistic enhancement technology in offshore oilfield development, accurately calculates the recovery rate in the chemical flooding and encryption synergistic enhancement development process of offshore oilfields, and provides reliable technical support and decision basis for offshore oilfield development. BRIEF DESCRIPTION OF DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0046] Figure 1 A flowchart of a recovery factor calculation method based on synergistic effect of chemical flooding and infill is provided.

[0047] Figure 2 A schematic diagram of interwell connectivity distribution for a specific embodiment.

[0048] Figure 3 A schematic diagram of single well group sweep area change for a specific embodiment.

[0049] Figure 4 A schematic diagram of longitudinal sweep area change for a specific embodiment.

[0050] Figure 5 A numerical simulation schematic diagram under different well patterns for a specific embodiment.

[0051] Figure 6 A numerical simulation schematic diagram of longitudinal profile for a specific embodiment.

[0052] Figure 7 A structure schematic diagram of a recovery factor calculation system based on synergistic effect of chemical flooding and infill is provided.

[0053] Figure 8 A structure schematic diagram of an electronic device is provided. DETAILED DESCRIPTION

[0054] To make the objectives, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below with reference to the drawings in the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. They should not be understood as limitations to the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application. In the description of the present application, it should be understood that the terms used are only for the purpose of description, and should not be understood as indicating or implying relative importance.

[0055] Figure 1 A flowchart of a recovery factor calculation method based on synergistic effect of chemical flooding and infill is provided. The execution subject of the recovery factor calculation method based on synergistic effect of chemical flooding and infill provided by the present application can be any applicable terminal side device or network side device, such as a recovery factor calculation device based on synergistic effect of chemical flooding and infill, etc.

[0056] Referring to Figure 1 The recovery factor calculation method based on synergistic effect of chemical flooding and infill provided by the present application can include:

[0057] S110, obtain interwell relationship data, well group characteristic data, layer series characteristic data, and phase permeability data of the to-be-tested well pattern when the chemical flooding and infill synergistic technology is applied, wherein the well group characteristic data includes any one or any combination of the following: well group chemical flooding control degree, mobility ratio, single well water cut before well pattern conversion, injection-production pressure difference, well spacing, new well initial water cut, cumulative injection volume, cumulative injection volume after well pattern conversion, single well water cut at a statistical time node, oil phase viscosity, and displacement phase viscosity; the layer series characteristic data includes any one or any combination of the following: water-oil ratio, well spacing, maximum pseudo-resistance coefficient in the layer series, minimum pseudo-resistance coefficient in the layer series, function of reservoir permeability variation coefficient, and interwell injection-production pressure difference average value in the layer; and the phase permeability data includes any one or any combination of the following: irreducible water saturation, residual oil saturation, water flooding front saturation, water cut when the water flooding front reaches the outlet end, water phase index, oil phase index, and water cut. The injection-production pressure difference, well spacing, cumulative injection volume, and cumulative injection volume after well pattern conversion of two connected wells can be determined according to the interwell relationship data to determine the connection relationship between the well patterns and are determined in advance according to a preset well group division relationship.

[0058] S120, obtaining the planar sweep efficiency of the to-be-tested well pattern by a first expression according to the interwell relationship data and the well group characteristic data.

[0059] The embodiment determines the size and distribution of the effective planar sweep area according to the sand body control degree and the injection scheme of the offshore oilfield on the basis of the planar sweep efficiency before the original well pattern is infilled, wherein the sand body control degree is a function of the ratio of different injection-production well numbers and the relative area of the sand body under different well pattern conditions, the sand body control degree is different under different water flooding and chemical flooding injection schemes, the sand body control degree under the chemical flooding condition is a function of the polymer waveable oil layer pore volume, the first expression of the embodiment is combined with the characteristics of the chemical flooding and infill synergistic technology of the offshore oilfield, and the planar sweep efficiency is mainly affected by the planar flow line change, the injection-production correspondence rate change, the oil well initial water cut, and the viscosity.

[0060]

[0061] In the first expression, E AZ represents the planar sweep efficiency of the to-be-tested well pattern; T, a, b, c, d, e, f, A, B, and C represent well pattern related coefficients (which can be obtained according to a preset coefficient table, and Table 1 is shown as an example); i represents the well group serial number; λ i represents the well group chemical flooding control degree; M represents the mobility ratio; f bwi represents the single well water cut before well pattern conversion; ΔP i represents the injection-production pressure difference; d i represents the well spacing; f woi represents the new well initial water cut; W Pi represents the cumulative injection volume; and W iCumulative injection after pattern conversion; f awi Single well water cut representing statistical time node; μ o Oil phase viscosity; μ pi Displacement phase viscosity.

[0062] The plane wave and coefficient calculation method of the embodiment relies on superposition of injection-production well groups, and the calculation method is in line with actual dynamics and data is easy to obtain. The plane wave and coefficient calculation considers the influence of different well patterns and well spacings on interwell pressure gradient, and also considers the influence of different years on wave and coefficient comparison, and is in line with the main change characteristics of interwell reservoir after well pattern conversion, so that the calculation result is more accurate.

[0063] S130, according to the interwell relationship data and the layer system characteristic data, the longitudinal wave and coefficient of the to-be-tested well pattern is obtained through a second expression.

[0064] On the basis of the longitudinal wave and coefficient before the original well pattern is encrypted, according to the characteristics of the offshore oilfield chemical flooding and encryption synergistic effect technology for well pattern reconstruction and layer system reorganization, considering that the longitudinal wave and coefficient is mainly affected by pressure gradient, interlayer resistance coefficient and viscosity change, a second expression is established as follows:

[0065]

[0066] In the second expression, E H Longitudinal wave and coefficient of the to-be-tested well pattern; a1, a2, a3, a4, D, E, F represent well pattern related coefficients; j represents layer system serial number; Y represents an experience coefficient, Wherein WOR represents water-oil ratio, b1, b2, b3, b4 and b5 represent fitting coefficients, d i Well spacing; R'' f '' j Ratio of maximum pseudo-resistance coefficient to minimum pseudo-resistance coefficient in layer system; X represents a function of reservoir permeability variation coefficient, X = b6V 2 +b7V+b8; ΔP ave Average value of interwell injection-production pressure difference in layer.

[0067] The longitudinal wave and coefficient calculation of the embodiment introduces a pseudo-resistance coefficient ratio, fully considers the influence of layer system change on longitudinal wave and coefficient, and is in line with the characteristics of chemical flooding and encryption synergistic effect technology.

[0068] S140, according to phase permeability data, the oil displacement efficiency of the to-be-tested well pattern is obtained through a third expression.

[0069] The embodiment determines the oil displacement efficiency under different displacement modes according to the endpoints of the phase permeability curve, that is, different displacement modes give corresponding phase permeability curves, and a third expression is established as follows:

[0070]

[0071] In the third expression, E d represents the oil displacement efficiency of the to-be-tested well pattern; S wc represents the irreducible water saturation; S or represents the residual oil saturation; w and b represent process parameters, wherein S wf represents the water drive front saturation, f wf represents the water content when the water drive front reaches the outlet end; n w represents the water phase index, n o represents the oil phase index, f w represents the water cut.

[0072] The oil displacement efficiency obtained in this embodiment is consistent with the characteristics of the chemical flooding enhanced oil recovery technology in consideration of the variation characteristics of the relative permeability curves under different displacement modes.

[0073] S150, according to the areal sweep efficiency, the longitudinal sweep efficiency and the oil displacement efficiency of the to-be-tested well pattern, the recovery efficiency of the to-be-tested well pattern is obtained through a fourth expression.

[0074] This embodiment calculates the recovery efficiency according to the swept volume-oil displacement efficiency method, obtains the swept volume through the areal sweep efficiency and the longitudinal sweep efficiency, obtains the oil displacement efficiency under the chemical flooding condition through the modification of the relative permeability curve endpoints by the chemical flooding, finally obtains the recovery efficiency under the synergistic effect of the offshore oilfield chemical flooding and the infilling, and forms the fourth expression as:

[0075] E R = E AZ E H E d ,

[0076] In the fourth expression, E R represents the recovery efficiency of the to-be-tested well pattern, E AZ represents the areal sweep efficiency of the to-be-tested well pattern; E H represents the longitudinal sweep efficiency of the to-be-tested well pattern; E d represents the oil displacement efficiency of the to-be-tested well pattern.

[0077] Figure 2-6 This embodiment intercepts a single well group from the Suizhong 36-1 actual model. The model porosity, permeability, original oil saturation, relative permeability, injection mode and dynamic, and well pattern conversion form are obtained according to the actual conditions of the oilfield. Figure 2-6The basic inverted nine-spot well pattern form of the verification model is shown, and the basic model of nine layers with barriers in the vertical direction is shown, and relevant dynamic data are given based on the model. In the embodiment, the original inverted nine-spot well pattern is converted into an oil well row infill well pattern, the sweep efficiency after the conversion of the well pattern is predicted by using a formula, the recovery efficiency is calculated, and finally, the accuracy is evaluated by comparing with the numerical simulation calculation result.

[0078] Referring to Figure 2-6 , the inverted nine-spot well pattern (to-be-tested well pattern) is converted into a slanting column oil well row infill mode by using the chemical flooding and infill synergistic enhancement technology. The interwell relationship data, well group feature data, layer series feature data, and phase permeability data are obtained from the geological data (sand body connectivity relationship) of the to-be-tested well pattern, fluid dynamics simulation (numerical simulation), actual production data (tracer, pressure monitoring or production dynamic), dynamic tracking data, and the like. The planar sweep efficiency of the to-be-tested well pattern after the conversion of the inverted nine-spot into the slanting column oil well row infill and the adoption of the chemical flooding is 0.92, and the correlation coefficients are shown in Table 1. The longitudinal sweep efficiency of the to-be-tested well pattern under the condition that the subdivided layer series is three groups is 0.82, and the correlation coefficients are shown in Table 1. The oil displacement efficiency of the to-be-tested well pattern after the chemical flooding and infill synergistic enhancement of the offshore oilfield is 0.63, and the recovery efficiency of the to-be-tested well pattern under the synergistic enhancement of the chemical flooding and infill of the offshore oilfield is 0.48. The relative error with the numerical simulation result is 1.25%, and the result accuracy is relatively high.

[0079] Table 1 Correlation coefficients related to well patterns under different conditions

[0080]

[0081]

[0082] The recovery efficiency calculation method of the chemical flooding and infill synergistic enhancement provided in the application relies on the water flooding enhanced oil recovery theory technology of the offshore oilfield, combines the injection medium conversion, well pattern form conversion and well spacing conversion technical characteristics in the chemical flooding and infill process, effectively utilizes the mine field dynamic monitoring data through the well group division mode, gives the planar sweep efficiency correction term, the longitudinal sweep efficiency correction term and the displacement efficiency representation term, and finally realizes the accurate calculation of the recovery efficiency of the chemical flooding and infill synergistic enhancement of the offshore oilfield by using the swept volume-oil displacement efficiency method.

[0083] The chemical flooding and infilling synergistic enhanced recovery factor calculation method provided by the application is suitable for the sweep efficiency calculation method of balanced and single well pattern, is improved to be suitable for the sweep efficiency calculation method under different well patterns and different injection modes, and combined with the oil displacement efficiency calculation method of offshore oil fields, the chemical flooding and infilling synergistic enhanced recovery factor calculation method is obtained.

[0084] The chemical flooding and infilling synergistic enhanced recovery factor calculation system provided by the application is described below, and the chemical flooding and infilling synergistic enhanced recovery factor calculation system described below can be correspondingly referred to the chemical flooding and infilling synergistic enhanced recovery factor calculation method described above.

[0085] Referring to Figure 7 The chemical flooding and infilling synergistic enhanced recovery factor calculation system provided by the application comprises:

[0086] The data acquisition module is configured to acquire interwell relationship data, well group feature data, layer series feature data and relative permeability data of the to-be-tested well pattern when the chemical flooding and infilling synergistic enhanced technology is applied.

[0087] The planar sweep efficiency obtaining module is configured to obtain the planar sweep efficiency of the to-be-tested well pattern according to the interwell relationship data and the well group feature data.

[0088] The longitudinal sweep efficiency obtaining module is configured to obtain the longitudinal sweep efficiency of the to-be-tested well pattern according to the interwell relationship data and the layer series feature data.

[0089] The oil displacement efficiency obtaining module is configured to obtain the oil displacement efficiency of the to-be-tested well pattern according to the relative permeability data.

[0090] The recovery factor obtaining module is configured to obtain the recovery factor of the to-be-tested well pattern according to the planar sweep efficiency, the longitudinal sweep efficiency and the oil displacement efficiency of the to-be-tested well pattern.

[0091] Figure 8 An example of an entity structure schematic diagram of an electronic device is shown in Figure 8 As shown in the figure, the electronic device can include a processor 810, a communications interface 820, a memory 830 and a communications bus 840, wherein the processor 810, the communications interface 820 and the memory 830 complete mutual communication through the communications bus 840. The processor 810 can call the logical instructions in the memory 830 to execute the following steps:

[0092] Obtain the interwell relationship data, well group characteristic data, layer series characteristic data, and phase permeability data of the to-be-tested well pattern when the chemical flooding and infill synergistic technology is applied;

[0093] According to the interwell relationship data and the well group characteristic data, the planar sweep efficiency of the to-be-tested well pattern is obtained.

[0094] According to the interwell relationship data and the layer series characteristic data, the vertical sweep efficiency of the to-be-tested well pattern is obtained.

[0095] According to the phase permeability data, the oil displacement efficiency of the to-be-tested well pattern is obtained.

[0096] According to the planar sweep efficiency, the vertical sweep efficiency, and the oil displacement efficiency of the to-be-tested well pattern, the recovery efficiency of the to-be-tested well pattern is obtained.

[0097] In addition, the logical instructions in the memory 830 described above can be implemented in the form of a software function unit and sold or used as an independent product, and can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or the parts that contribute to the prior art or parts of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various media that can store program codes.

[0098] On the other hand, the present application also provides a computer program product, which comprises a computer program, the computer program can be stored on a non-transitory computer readable storage medium, and the computer program can be executed by a processor, so that the computer can execute the following steps:

[0099] Obtain the interwell relationship data, well group characteristic data, layer series characteristic data, and phase permeability data of the to-be-tested well pattern when the chemical flooding and infill synergistic technology is applied;

[0100] According to the interwell relationship data and the well group characteristic data, the planar sweep efficiency of the to-be-tested well pattern is obtained.

[0101] According to the interwell relationship data and the layer series characteristic data, the vertical sweep efficiency of the to-be-tested well pattern is obtained.

[0102] According to the phase permeability data, the oil displacement efficiency of the to-be-tested well pattern is obtained.

[0103] According to the planar sweep coefficient, the longitudinal sweep coefficient and the oil displacement efficiency of the to-be-tested well pattern, the recovery efficiency of the to-be-tested well pattern is obtained.

[0104] In another aspect, the application further provides a non-transitory computer readable storage medium, having stored thereon a computer program, which, when executed by a processor, implements the following steps:

[0105] Obtaining interwell relationship data, well group feature data, layer series feature data and phase permeability data of the to-be-tested well pattern when the chemical flooding and encryption synergistic technology are applied;

[0106] According to the interwell relationship data and the well group feature data, the planar sweep coefficient of the to-be-tested well pattern is obtained.

[0107] According to the interwell relationship data and the layer series feature data, the longitudinal sweep coefficient of the to-be-tested well pattern is obtained.

[0108] According to the phase permeability data, the oil displacement efficiency of the to-be-tested well pattern is obtained.

[0109] According to the planar sweep coefficient, the longitudinal sweep coefficient and the oil displacement efficiency of the to-be-tested well pattern, the recovery efficiency of the to-be-tested well pattern is obtained.

[0110] The apparatus embodiments described above are merely illustrative, wherein the units shown as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e., can be located in one place, or can be distributed on a plurality of network units. Part or all of the modules can be selected according to actual needs to achieve the purpose of the present embodiment scheme. Those skilled in the art can understand and implement without creative labor.

[0111] From the above description of the embodiments, those skilled in the art can clearly understand that the embodiments can be realized by means of software plus necessary universal hardware platforms, and of course can also be realized by hardware. Based on such understanding, the above technical solutions, essentially or in other words, the part that contributes to the prior art, can be embodied in the form of a software product, which can be stored in a computer readable storage medium, such as a ROM / RAM, a magnetic disk, an optical disk, etc., and includes a plurality of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute the methods described in each embodiment or some parts of the embodiments.

[0112] It should be pointed out finally that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit the same; and although the present application has been described in detail with reference to the foregoing embodiments, it should be appreciated by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features thereof can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for calculating oil recovery based on synergistic efficiency enhancement of chemical flooding and infilling, characterized in that: include: Obtain inter-well relationship data, well group characteristic data, stratum characteristic data, and phase permeability data of the well network to be tested when applying chemical flooding and infill synergistic efficiency enhancement technology; According to the well-to-well relationship data and well group characteristic data, the plane sweep coefficient of the well network to be measured is obtained; According to the inter-well relationship data and formation characteristic data, the vertical sweep coefficient of the well network to be measured is obtained; According to the phase permeability data, the oil displacement efficiency of the well network to be tested is obtained; The recovery factor of the well network to be tested is obtained according to the plane sweep coefficient, vertical sweep coefficient and oil displacement efficiency of the well network to be tested; The method of obtaining the plane sweep coefficient of the well network to be measured based on the well-to-well relationship data and the well group characteristic data includes: According to the well-to-well relationship data and the well group characteristic data, the plane sweep coefficient of the well network to be measured is obtained by the first expression, wherein the first expression is: ， In the first expression, Indicates the plane sweep coefficient of the well network to be measured; T, a, b, c, d, e, f, A, B, C indicate the correlation coefficients with the well network; i indicates the well group number; Indicates the degree of chemical flooding control in the well group; M indicates the mobility ratio; Indicates the water content of a single well before well pattern conversion; Indicates the injection-production pressure difference; represents the well spacing; Indicates the initial water content of the new well; Indicates the cumulative injection volume; Cumulative injection volume after well pattern conversion; Indicates the water content of a single well at the statistical time node; Indicates the viscosity of the oil phase; represents the displacement phase viscosity; The method of obtaining the longitudinal sweep coefficient of the well network to be measured based on the well-to-well relationship data and the formation characteristic data includes: According to the inter-well relationship data and the formation characteristic data, the longitudinal sweep coefficient of the well network to be measured is obtained through the second expression, where the second expression is: ， In the second expression, Indicates the longitudinal sweep coefficient of the well network to be measured; a1, a2, a3, a4, D, E, F indicate the correlation coefficients with the well network; j indicates the sequence number of the layer; Y indicates the empirical coefficient; represents the well spacing; It represents the ratio of the maximum pseudo-resistance coefficient to the minimum pseudo-resistance coefficient in the layer system; X represents the function of the coefficient of variation of reservoir permeability; Indicates the average injection-production pressure difference between wells within the layer; The oil displacement efficiency of the well network to be measured is obtained based on the phase permeability data, including: According to the phase permeability data, the oil displacement efficiency of the well network to be measured is obtained through the third expression, where the third expression is: ， In the third expression, Indicates the oil displacement efficiency of the well network to be tested; represents the bound water saturation; Indicates residual oil saturation; w and b indicate process parameters; Indicates the saturation of the water flooding front; Indicates the water content when the water flooding front reaches the outlet end; , The water phase index, Indicates the oil phase index, Indicates moisture content; The method of obtaining the recovery factor of the well network to be measured based on the plane sweep coefficient, the longitudinal sweep coefficient, and the oil displacement efficiency of the well network to be measured includes: According to the plane sweep coefficient, longitudinal sweep coefficient, and displacement efficiency of the well network to be measured, the recovery factor of the well network to be measured is obtained by the fourth expression, wherein the fourth expression is: ， In the fourth expression, Indicates the recovery factor of the well network to be tested, Indicates the plane sweep coefficient of the well network to be measured; Indicates the longitudinal sweep coefficient of the well network to be measured; Indicates the oil displacement efficiency of the well network to be tested.

2. The method for calculating the recovery factor of chemical flooding and infill synergistic efficiency according to claim 1, characterized in that: The well group characteristic data include any one of the following items or any combination thereof: the degree of chemical flooding control of the well group, mobility ratio, water content of a single well before well pattern conversion, injection-production pressure difference, well spacing, initial water content of a new well, cumulative injection volume, cumulative injection volume after well pattern conversion, water content of a single well at the statistical time node, oil phase viscosity, and displacement phase viscosity.

3. The method for calculating the recovery factor of chemical flooding and infill synergistic efficiency according to claim 2, characterized in that: The formation characteristic data include any one of the following or any combination thereof: water-oil ratio, well spacing, maximum pseudo resistance coefficient within the formation, minimum pseudo resistance coefficient within the formation, function of reservoir permeability variation coefficient, and average injection-production pressure difference between wells within the formation.

4. The method for calculating the recovery factor of chemical flooding and infill synergistic efficiency according to claim 3, characterized in that: The relative permeability data includes any one of the following items or any combination thereof: irreducible water saturation, residual oil saturation, water flooding front saturation, water cut when the water flooding front reaches the outlet, water phase index, oil phase index, and water cut.

5. A recovery factor calculation system based on synergistic efficiency enhancement of chemical flooding and infilling, characterized in that: include: The data acquisition module is used to obtain the well network relationship data, well group characteristic data, layer characteristic data, and phase permeability data when applying the chemical flooding and infill synergistic efficiency enhancement technology; The plane sweep coefficient obtaining module is used to obtain the plane sweep coefficient of the well network to be measured based on the well relationship data and the well group characteristic data; The longitudinal sweep coefficient obtaining module is used to obtain the longitudinal sweep coefficient of the well network to be measured based on the inter-well relationship data and the formation characteristic data; The oil displacement efficiency obtaining module is used to obtain the oil displacement efficiency of the well network to be measured based on the phase permeability data; The recovery factor obtaining module is used to obtain the recovery factor of the well network to be measured based on the plane sweep coefficient, longitudinal sweep coefficient and oil displacement efficiency of the well network to be measured; The method of obtaining the plane sweep coefficient of the well network to be measured based on the well-to-well relationship data and the well group characteristic data includes: According to the well-to-well relationship data and the well group characteristic data, the plane sweep coefficient of the well network to be measured is obtained by the first expression, wherein the first expression is: ， In the first expression, Indicates the plane sweep coefficient of the well network to be measured; T, a, b, c, d, e, f, A, B, C indicate the correlation coefficients with the well network; i indicates the well group number; Indicates the degree of chemical flooding control in the well group; M indicates the mobility ratio; Indicates the water content of a single well before well pattern conversion; Indicates the injection-production pressure difference; represents the well spacing; Indicates the initial water content of the new well; Indicates the cumulative injection volume; Cumulative injection volume after well pattern conversion; Indicates the water content of a single well at the statistical time node; Indicates the viscosity of the oil phase; represents the displacement phase viscosity; The method of obtaining the longitudinal sweep coefficient of the well network to be measured based on the well-to-well relationship data and the formation characteristic data includes: According to the inter-well relationship data and the formation characteristic data, the longitudinal sweep coefficient of the well network to be measured is obtained through the second expression, where the second expression is: ， In the second expression, Indicates the longitudinal sweep coefficient of the well network to be measured; a1, a2, a3, a4, D, E, F indicate the correlation coefficients with the well network; j indicates the sequence number of the layer; Y indicates the empirical coefficient; represents the well spacing; It represents the ratio of the maximum pseudo-resistance coefficient to the minimum pseudo-resistance coefficient in the layer system; X represents the function of the coefficient of variation of reservoir permeability; Indicates the average injection-production pressure difference between wells within the layer; The oil displacement efficiency of the well network to be measured is obtained based on the phase permeability data, including: According to the phase permeability data, the oil displacement efficiency of the well network to be measured is obtained through the third expression, where the third expression is: ， In the third expression, Indicates the oil displacement efficiency of the well network to be tested; represents the bound water saturation; Indicates residual oil saturation; w and b indicate process parameters; Indicates the saturation of the water flooding front; Indicates the water content when the water flooding front reaches the outlet end; , The water phase index, Indicates the oil phase index, Indicates moisture content; The method of obtaining the recovery factor of the well network to be measured based on the plane sweep coefficient, the longitudinal sweep coefficient, and the oil displacement efficiency of the well network to be measured includes: According to the plane sweep coefficient, longitudinal sweep coefficient, and displacement efficiency of the well network to be measured, the recovery factor of the well network to be measured is obtained by the fourth expression, wherein the fourth expression is: ， In the fourth expression, Indicates the recovery factor of the well network to be tested, Indicates the plane sweep coefficient of the well network to be measured; Indicates the longitudinal sweep coefficient of the well network to be measured; Indicates the oil displacement efficiency of the well network to be tested.

6. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the method for calculating the recovery rate of synergistically enhanced chemical flooding and encryption as described in any one of claims 1 to 4 is implemented.

7. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, it implements the method for calculating the recovery rate of synergistically enhanced chemical flooding and encryption as described in any one of claims 1 to 4.

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