Recovery ratio calculation method, system and equipment based on chemical flooding and encryption synergistic interaction and medium

Abstract

The invention relates to the technical field, and discloses a chemical flooding and encryption synergistic interaction-based recovery ratio calculation method, system, equipment and medium, which comprehensively considers the influence factors of the chemical flooding and encryption synergistic interaction technology in offshore oilfield development, accurately calculates the recovery ratio in the offshore oilfield chemical flooding and encryption synergistic interaction development process, and improves the recovery ratio of the offshore oilfield. And reliable technical support and decision basis are provided for offshore oilfield development.

Description

Technical Field

[0001] The present invention relates to the technical field of oilfield development, and in particular to a method, system, equipment and medium for calculating recovery rate based on synergistic efficiency enhancement of chemical flooding and encryption. Background Art

[0002] As one of the important means to improve the recovery rate of offshore oil fields, chemical flooding and infill synergistic enhancement has attracted widespread attention. Chemical flooding technology expands the swept volume and improves the oil recovery efficiency by injecting specific chemicals and optimizing injection parameters, thereby improving the recovery rate of the reservoir; infill technology expands the swept volume by optimizing the well pattern and water injection scheme, thereby improving the recovery rate of the water flooding stage. However, there are still some problems in the application of chemical flooding and infill synergistic enhancement technology in offshore oil fields. For example, the existing recovery rate calculation methods are often based on traditional physical models and empirical formulas. For example, some methods directly define the swept volume by the reservoir area without giving the original swept volume calculation method, and do not consider whether the well group is connected in the area; for another example, some methods use different empirical formulas to multiply to obtain the recovery rate, but this method does not consider the impact of the vertical swept volume of the reservoir after the formation division in the calculation process, and does not fully consider the impact of the well pattern conversion and the synergistic enhancement of chemical flooding on the swept volume.

[0003] Therefore, a new recovery factor calculation method, system, equipment and medium based on the synergistic enhancement of chemical flooding and encryption are urgently needed to comprehensively consider the influencing factors of the synergistic enhancement technology of chemical flooding and encryption in offshore oilfield development, accurately calculate the recovery factor in the process of synergistic enhancement development of chemical flooding and encryption in offshore oilfields, and provide reliable technical support and decision-making basis for offshore oilfield development. Summary of the invention

[0004] The present invention provides a recovery factor calculation method, system, equipment and medium based on chemical flooding and encryption synergistic enhancement, which is used to solve the defect that the existing recovery factor calculation method cannot obtain accurate recovery factor when chemical flooding and encryption synergistic enhancement technology is applied to offshore oil field development.

[0005] The present invention provides a method for calculating recovery factor based on synergistic efficiency enhancement of chemical flooding and infilling, comprising:

[0006] Obtain the well-to-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 enhancement technology;

[0007] 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;

[0008] According to the well-to-well relationship data and formation characteristic data, the vertical sweep coefficient of the well network to be measured is obtained;

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

[0010] The recovery factor of the well network to be tested is obtained according to the plane sweep coefficient, longitudinal sweep coefficient and oil displacement efficiency of the well network to be tested.

[0011] According to a method for calculating recovery factor based on synergistic enhancement of chemical flooding and infilling provided by the present invention, characteristic data of a well group include any one of the following items or any combination thereof: degree of control of chemical flooding of the well group, mobility ratio, water content of a single well before well network conversion, injection-production pressure difference, well spacing, initial water content of a new well, cumulative injection volume, cumulative injection volume after well network conversion, water content of a single well at a statistical time node, oil phase viscosity, and displacement phase viscosity.

[0012] According to a method for calculating recovery factor based on synergistic efficiency enhancement of chemical flooding and infilling provided by the present invention, the plane sweep coefficient of the well network to be measured is obtained according to the well relationship data and the well group characteristic data, including:

[0013] According to the well relationship data and the well group characteristic data, the plane sweep coefficient of the well network to be measured is obtained through the first expression, where the first expression is:

[0014]

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

[0016] According to a method for calculating recovery factor based on synergistic enhancement of chemical flooding and infilling provided by the present invention, the formation characteristic data include any one of the following items or any combination thereof: water-oil ratio, well spacing, maximum pseudo-resistance coefficient in the formation, minimum pseudo-resistance coefficient in the formation, function of reservoir permeability variation coefficient, and average injection-production pressure difference between wells in the formation.

[0017] According to a recovery factor calculation method based on chemical flooding and infill synergy enhancement provided by the present invention, the vertical sweep coefficient of the well network to be measured is obtained according to the well relationship data and the formation characteristic data, including:

[0018] According to the 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:

[0019]

[0020] In the second expression, E H represents the longitudinal sweep coefficient of the well network to be measured; a1, a2, a3, a4, D, E, F represent the correlation coefficients with the well network; j represents the sequence number of the layer; Y represents the empirical coefficient, Where WOR represents the water-oil ratio, b1, b2, b3, b4 and b5 represent the fitting coefficients, d i Indicates the well spacing; R″ f ″ j 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 reservoir permeability variation coefficient, X = b6V 2 +b7V+b8;ΔP ave It indicates the average injection-production pressure difference between wells within a layer.

[0021] According to a method for calculating recovery factor based on synergistic enhancement of chemical flooding and infilling provided by the present invention, phase permeability data includes any one of the following items or any combination thereof: irreducible water saturation, residual oil saturation, water flooding front saturation, water content when the water flooding front reaches the outlet end, water phase index, oil phase index, and water content.

[0022] According to a recovery factor calculation method based on chemical flooding and infill synergy enhancement provided by the present invention, the oil recovery efficiency of the well network to be measured is obtained according to the phase permeability data, including:

[0023] 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:

[0024]

[0025] In the third expression, E d Indicates the oil displacement efficiency of the well network to be tested; S wc Represents bound water saturation; S or represents the residual oil saturation; w and b represent process parameters, where S wf represents the saturation of the water flooding front, f wf It indicates 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 Indicates the water phase index, n o Indicates the oil phase index, f w Indicates moisture content.

[0026] According to a method for calculating recovery factor based on synergistic efficiency enhancement of chemical flooding and infilling provided by the present invention, the recovery factor of the well network to be tested is obtained according to the plane sweep coefficient, longitudinal sweep coefficient and oil displacement efficiency of the well network to be tested, including:

[0027] According to the plane sweep coefficient, longitudinal sweep coefficient and oil displacement efficiency of the well network to be measured, the recovery factor of the well network to be measured is obtained through the fourth expression, wherein the fourth expression is:

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

[0029] In the fourth expression, E R Indicates the recovery factor of the well network to be tested, E AZ Indicates the plane sweep coefficient of the well network to be measured; E H Indicates the longitudinal sweep coefficient of the well network to be tested; E d Indicates the oil recovery efficiency of the well network to be tested.

[0030] The present invention also provides a recovery factor calculation system based on the synergistic efficiency enhancement of chemical flooding and encryption, comprising:

[0031] The data acquisition module is used to obtain the well-to-well relationship data, well group characteristic data, stratum characteristic data, and phase permeability data of the well network to be tested when applying the chemical flooding and infill synergistic efficiency enhancement technology;

[0032] The plane sweep coefficient obtaining module is used to obtain the plane sweep coefficient of the well network to be measured according to the well relationship data and the well group characteristic data;

[0033] The module for obtaining the longitudinal sweep coefficient is used to obtain the longitudinal sweep coefficient of the well network to be measured according to the well relationship data and the formation characteristic data;

[0034] The oil recovery efficiency obtaining module is used to obtain the oil recovery efficiency of the well network to be tested based on the phase permeability data;

[0035] The recovery factor obtaining module is used to obtain the recovery factor of the well network to be measured according to the plane sweep coefficient, longitudinal sweep coefficient and oil displacement efficiency of the well network to be measured.

[0036] The present invention also provides an electronic device, comprising a processor and a memory storing a computer program, wherein when the processor executes the computer program, the method for calculating the recovery rate of chemical flooding and encryption synergistically enhancing the efficiency is implemented as described above.

[0037] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements any of the above-mentioned methods for calculating the recovery rate of synergistically enhancing the efficiency of chemical flooding and encryption.

[0038] The present invention also provides a computer program product, which includes a computer program. The computer program can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute any of the above-mentioned methods for calculating the recovery rate of synergistic chemical drive and encryption.

[0039] The present invention provides a method, system, device and medium for calculating recovery factor based on synergistic efficiency enhancement of chemical flooding and encryption, which has at least the following advantages:

[0040] (1) Well-to-well relationship data, well group characteristic data, stratum characteristic data, and phase permeability data can be directly obtained through oilfield dynamic monitoring. The data source is simple and more authentic. Using characteristic data that conforms to actual dynamic changes can improve the accuracy of calculating recovery factors.

[0041] (2) The plane sweep coefficient is calculated by using the well group superposition method, fully considering the influence of geological parameters such as the well connectivity and sand body connectivity on the sweep capacity, effectively improving the accuracy of the calculated recovery factor;

[0042] (3) The interlayer pseudo-seepage resistance coefficient and viscosity ratio are used to calculate the longitudinal sweep coefficient, so as to achieve the purpose of improving the recovery factor after adjusting the layer system for chemical flooding and infill synergy enhancement technology;

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

[0044] The present invention provides a method, system, equipment and medium for calculating the recovery factor based on the synergistic enhancement of chemical flooding and encryption, which comprehensively considers the influencing factors of the synergistic enhancement technology of chemical flooding and encryption in the development of offshore oil fields, accurately calculates the recovery factor in the process of synergistic enhancement development of chemical flooding and encryption in offshore oil fields, and provides reliable technical support and decision-making basis for the development of offshore oil fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0046] Figure 1 A schematic flow chart of a method for calculating recovery factor based on synergistic efficiency enhancement of chemical flooding and encryption provided by the present invention.

[0047] Figure 2 It is a schematic diagram of the distribution of well-to-well connectivity conditions in a specific embodiment.

[0048] Figure 3 It is a schematic diagram of the change of the swept area of ​​a single well group in a plane according to a specific embodiment.

[0049] Figure 4 It is a schematic diagram of the change of the vertical swept area of ​​the oil reservoir in a specific embodiment.

[0050] Figure 5 It is a schematic diagram of numerical simulation under different well pattern conversions of a specific embodiment.

[0051] Figure 6 It is a schematic diagram of numerical simulation of the vertical section of an oil reservoir according to a specific embodiment.

[0052] Figure 7 A schematic diagram of the structure of a recovery factor calculation system based on synergistic efficiency enhancement of chemical flooding and encryption provided by the present invention.

[0053] Figure 8 This is a schematic structural diagram of an electronic device provided by the present invention. DETAILED DESCRIPTION

[0054] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings in the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments, and they should not be understood as limitations on the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. In the description of the present invention, it should be understood that the terms used are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0055] Figure 1 A flow chart of a method for calculating the recovery factor based on the synergistic enhancement of chemical flooding and encryption provided by the present invention. The execution subject of the method for calculating the recovery factor based on the synergistic enhancement of chemical flooding and encryption provided by the present invention can be any applicable terminal side device or network side device, such as a recovery factor calculation device for the synergistic enhancement of chemical flooding and encryption.

[0056] See also Figure 1 The present invention provides a method for calculating the recovery factor based on the synergistic effect enhancement of chemical flooding and infilling, which may include:

[0057] S110. Obtain the well-to-well relationship data, well group characteristic data, formation characteristic data, and phase permeability data of the well network to be tested when applying the chemical flooding and encryption synergistic enhancement technology, wherein the well group characteristic data include any one of the following items or any combination thereof: well group chemical flooding control degree, mobility ratio, single well water content before well network conversion, injection-production pressure difference, well spacing, initial water content of new wells, cumulative injection volume, cumulative injection volume after well network conversion, single well water content at statistical time nodes, oil phase viscosity, and displacement phase viscosity; the formation characteristic data include any one of the following items 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, average injection-production pressure difference between wells within the formation; the phase permeability data include any one of the following items or any combination thereof: bound water saturation, residual oil saturation, water flooding front saturation, water content when the water flooding front reaches the outlet end, water phase index, oil phase index, and water content. Among them, the injection-production pressure difference, well spacing, cumulative injection volume, cumulative injection volume after well network conversion, etc. of two connected wells can be determined based on the inter-well relationship data to determine the connectivity relationship between the well networks and can be determined in advance based on the preset well group division relationship.

[0058] S120. 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 through a first expression.

[0059] In this embodiment, based on the plane sweep coefficient before the original well pattern densification, the size and distribution of the effective plane sweep area are determined according to the sand body control degree and injection scheme of the offshore oil field, wherein the sand body control degree is a function of different injection-production well number ratios and sand body relative areas under different well pattern conditions, and the sand body control degrees of water flooding and chemical flooding are different under different injection schemes. Under chemical flooding conditions, the sand body control degree is a function of the oil layer pore volume that can be swept by the polymer. Combined with the technical characteristics of synergistic enhancement of chemical flooding and densification in offshore oil fields, considering that the plane sweep coefficient is mainly affected by the changes in plane streamlines, the changes in the injection-production correspondence rate, the initial water content and viscosity of the oil well, the first expression of this embodiment is:

[0060]

[0061] In the first expression, E AZ represents the plane sweep coefficient of the well network to be measured; T, a, b, c, d, e, f, A, B, C represent the correlation coefficients with the well network (which can be obtained according to the preset coefficient table, see Table 1 for examples); i represents the well group number; λ i represents the control degree of chemical flooding in the well group; M represents the mobility ratio; f bwi Indicates the water content of a single well before well pattern conversion; ΔP i Indicates the injection-production pressure difference; d i represents the well spacing; f woi Indicates the initial water content of the new well; W Pi Indicates the cumulative injection volume; W iCumulative injection volume after well pattern conversion; f awi Indicates the water content of a single well at the statistical time node; μ o Indicates the viscosity of the oil phase; μ pi represents the viscosity of the displacing phase.

[0062] The plane sweep coefficient calculation method of this embodiment relies on the superposition of injection and production well groups, the calculation method fits the actual dynamics on site, and the data is easy to obtain. The plane sweep coefficient calculation takes into account the impact of different well patterns and well spacing on the inter-well pressure gradient, and clarifies the impact of different annual comparisons on the sweep coefficient. The overall compliance is in line with the main changes in the wells of the reservoir after the well pattern conversion, and the calculation results are more accurate.

[0063] S130. According to the well-to-well relationship data and the formation characteristic data, the longitudinal sweep coefficient of the well network to be measured is obtained through a second expression.

[0064] In this embodiment, based on the longitudinal sweep coefficient before the original well pattern densification, according to the characteristics of the offshore oilfield chemical flooding and densification synergistic efficiency enhancement technology, which is the well pattern reconstruction and layer reorganization, the longitudinal sweep coefficient is mainly affected by the pressure gradient, the interlayer resistance coefficient and the viscosity change, and the second expression is established as follows:

[0065]

[0066] In the second expression, E H represents the longitudinal sweep coefficient of the well network to be measured; a1, a2, a3, a4, D, E, F represent the correlation coefficients with the well network; j represents the sequence number of the layer; Y represents the empirical coefficient, Where WOR represents the water-oil ratio, b1, b2, b3, b4 and b5 represent the fitting coefficients, d i Indicates the well spacing; R″ f ″ j 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 reservoir permeability variation coefficient, X = b6V 2 +b7V+b8;ΔP ave It indicates the average injection-production pressure difference between wells within a layer.

[0067] The calculation of the longitudinal sweep coefficient in this embodiment introduces the pseudo-resistance coefficient ratio, fully considering the influence of the layer change process on the longitudinal sweep coefficient, and conforming to the technical characteristics of chemical flooding and encryption synergistic efficiency enhancement.

[0068] S140. Obtain the oil displacement efficiency of the well network to be measured according to the phase permeability data through a third expression.

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

[0070]

[0071] In the third expression, E d Indicates the oil displacement efficiency of the well network to be tested; S wc Represents bound water saturation; S or represents the residual oil saturation; w and b represent process parameters, where S wf represents the saturation of the water flooding front, f wf It indicates the water content when the water drive front reaches the outlet end; n w Indicates the water phase index, n o Indicates the oil phase index, f w Indicates moisture content.

[0072] This embodiment comprehensively considers the variation characteristics of the phase permeability curves under different displacement modes, and the obtained oil displacement efficiency is consistent with the technical characteristics of chemical flooding to enhance oil recovery.

[0073] S150. According to the plane sweep coefficient, the longitudinal sweep coefficient, and the oil displacement efficiency of the well network to be measured, the recovery factor of the well network to be measured is obtained through the fourth expression.

[0074] This embodiment calculates the recovery factor based on the swept volume-oil displacement efficiency method, obtains the swept volume through the plane sweep coefficient and the longitudinal sweep coefficient, obtains the oil displacement efficiency under the chemical flooding condition by correcting the end point of the phase permeability curve through chemical flooding, and finally obtains the recovery factor under the synergistic effect of chemical flooding and infilling in the offshore oil field, forming a fourth expression:

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

[0076] In the fourth expression, E R Indicates the recovery factor of the well network to be tested, E AZ Indicates the plane sweep coefficient of the well network to be measured; E H Indicates the longitudinal sweep coefficient of the well network to be tested; E d Indicates the oil recovery efficiency of the well network to be tested.

[0077] Figure 2-6 It is derived from the actual model of Suizhong 36-1, from which a single well group is intercepted in this embodiment. The model porosity, permeability, original oil saturation, relative permeability, injection method, dynamics, and well network conversion form are all obtained according to the actual conditions of the oil field. Figure 2-6The basic inverse nine-point well pattern of the verification model is shown, and the basic model of nine vertical layers with interlayers is shown. Based on this model, relevant dynamic data is given. This embodiment converts the original inverse nine-point well pattern into an oil well density well pattern, uses a formula to predict the sweep coefficient after the conversion well pattern, calculates the recovery factor, and finally compares it with the numerical simulation calculation results to evaluate the accuracy.

[0078] See also Figure 2-6 In this embodiment, the inverse nine-point well pattern (well pattern to be tested) is converted into an oblique row and column well pattern encryption method by using chemical flooding and encryption synergistic technology. The well relationship data, well group characteristic data, layer characteristic data, and phase permeability data are obtained from the geological data (sand body connectivity relationship) of the well pattern to be tested, fluid dynamics simulation (numerical simulation), actual production data (tracer, pressure monitoring or production dynamics), dynamic tracking data, etc. The plane wave and system are calculated by the first expression after the well pattern to be tested is converted into an oblique row and column well pattern encryption and chemical flooding is adopted. The number is 0.92, and the correlation coefficient is shown in Table 1. The second expression is used to calculate that under the condition of the subdivided strata being three groups, the longitudinal sweep coefficient of the well network to be tested is 0.82, and the correlation coefficient is shown in Table 1. The third expression is used to calculate that after the synergistic enhancement of chemical flooding and infilling in offshore oil fields, the oil displacement efficiency of the well network to be tested is 0.63. The fourth expression is used to calculate that the recovery factor of the well network to be tested under the synergistic enhancement of chemical flooding and infilling in offshore oil fields is 0.48, and the relative error with the numerical simulation result is 1.25%, and the result has high accuracy.

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

[0080]

[0081]

[0082] The method for calculating the recovery rate of the synergistic enhancement of chemical flooding and infill provided by the present invention relies on the theoretical technology of improving oil recovery by water flooding in offshore oil fields, combines the technical characteristics of injection medium conversion, well network form conversion and well spacing conversion in the process of chemical flooding and infilling, and effectively utilizes the dynamic monitoring data of the mine through the well group division method, and provides the plane sweep coefficient correction term, the longitudinal sweep coefficient correction term and the displacement efficiency characterization term. Through the sweep volume-oil displacement efficiency method, the accurate calculation of the synergistic enhancement of oil recovery rate of chemical flooding and infilling in offshore oil fields is finally achieved.

[0083] The recovery factor calculation method for the synergistic enhancement of chemical flooding and infill provided by the present invention improves the sweep coefficient calculation method applicable to a balanced and single well network into a sweep coefficient calculation method applicable to different well networks and different injection modes, and combines it with the offshore oil field oil recovery efficiency calculation method to obtain the recovery factor calculation method for the synergistic enhancement of chemical flooding and infill. Through mutual verification of numerical simulation and calculation results, it is found that the calculation result of the present invention has a small error, which can provide strong data support for oil field production.

[0084] The following is a description of the recovery factor calculation system for synergistic chemical flooding and encryption provided by the present invention. The recovery factor calculation system for synergistic chemical flooding and encryption described below and the recovery factor calculation method for synergistic chemical flooding and encryption described above can be referenced to each other.

[0085] See also Figure 7 The present invention provides a chemical flooding and encryption synergistic recovery factor calculation system, comprising:

[0086] The data acquisition module is used to obtain the well-to-well relationship data, well group characteristic data, stratum characteristic data, and phase permeability data of the well network to be tested when applying the chemical flooding and infill synergistic efficiency enhancement technology;

[0087] The plane sweep coefficient obtaining module is used to obtain the plane sweep coefficient of the well network to be measured according to the well relationship data and the well group characteristic data;

[0088] The module for obtaining the longitudinal sweep coefficient is used to obtain the longitudinal sweep coefficient of the well network to be measured according to the well relationship data and the formation characteristic data;

[0089] The oil recovery efficiency obtaining module is used to obtain the oil recovery efficiency of the well network to be tested based on the phase permeability data;

[0090] The recovery factor obtaining module is used to obtain the recovery factor of the well network to be measured according to the plane sweep coefficient, longitudinal sweep coefficient and oil displacement efficiency of the well network to be measured.

[0091] Figure 8 An example of a physical structure diagram of an electronic device is shown in FIG. Figure 8 As shown, the electronic device may include: a processor 810, a communication interface 820, a memory 830 and a communication bus 840, wherein the processor 810, the communication interface 820 and the memory 830 communicate with each other through the communication bus 840. The processor 810 may call the logic instructions in the memory 830 to perform the following steps:

[0092] Obtain the well-to-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 enhancement technology;

[0093] 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;

[0094] According to the well-to-well relationship data and formation characteristic data, the vertical sweep coefficient of the well network to be measured is obtained;

[0095] According to the phase permeability data, the oil displacement efficiency of the well network to be tested is obtained;

[0096] The recovery factor of the well network to be tested is obtained according to the plane sweep coefficient, longitudinal sweep coefficient and oil displacement efficiency of the well network to be tested.

[0097] In addition, the logic instructions in the above-mentioned memory 830 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0098] On the other hand, the present invention further provides a computer program product, the computer program product comprising a computer program, the computer program can be stored on a non-transitory computer readable storage medium, and when the computer program is executed by a processor, the computer can perform the following steps:

[0099] Obtain the well-to-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 enhancement technology;

[0100] 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;

[0101] According to the well-to-well relationship data and formation characteristic data, the vertical sweep coefficient of the well network to be measured is obtained;

[0102] According to the phase permeability data, the oil displacement efficiency of the well network to be tested is obtained;

[0103] The recovery factor of the well network to be tested is obtained according to the plane sweep coefficient, longitudinal sweep coefficient and oil displacement efficiency of the well network to be tested.

[0104] In another aspect, the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon, which is implemented to perform the following steps when executed by a processor:

[0105] Obtain the well-to-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 enhancement technology;

[0106] 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;

[0107] According to the well-to-well relationship data and formation characteristic data, the vertical sweep coefficient of the well network to be measured is obtained;

[0108] According to the phase permeability data, the oil displacement efficiency of the well network to be tested is obtained;

[0109] The recovery factor of the well network to be tested is obtained according to the plane sweep coefficient, longitudinal sweep coefficient and oil displacement efficiency of the well network to be tested.

[0110] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without creative work.

[0111] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0112] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for calculating oil recovery based on synergistic efficiency enhancement of chemical flooding and infilling, characterized in that: include: Obtain the well-to-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 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 well-to-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, longitudinal sweep coefficient and oil displacement efficiency of the well network to be tested.

2. The method for calculating the recovery factor of chemical flooding and densification 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 network conversion, injection-production pressure difference, well spacing, initial water content of a new well, cumulative injection volume, cumulative injection volume after well network conversion, water content of a single well at a statistical time node, oil phase viscosity, and displacement phase viscosity.

3. The method for calculating the recovery factor of chemical flooding and densification synergistic efficiency according to claim 2, characterized in that: The plane sweep coefficient of the well network to be measured is obtained according to the well relationship data and the well group characteristic data, including: According to the well relationship data and the well group characteristic data, the plane sweep coefficient of the well network to be measured is obtained through the first expression, where the first expression is: In the first expression, E AZ represents the plane sweep coefficient of the well network to be measured; T, a, b, c, d, e, f, A, B, C represent the correlation coefficients with the well network; i represents the well group number; λ i represents the control degree of chemical flooding in the well group; M represents the mobility ratio; f bwi Indicates the water content of a single well before well pattern conversion; ΔP i Indicates the injection-production pressure difference; d i represents the well spacing; f woi Indicates the initial water content of the new well; W Pi Indicates the cumulative injection volume; W i Cumulative injection volume after well pattern conversion; f awi Indicates the water content of a single well at the statistical time node; μ o Indicates the viscosity of the oil phase; μ pi represents the viscosity of the displacing phase.

4. The method for calculating the recovery factor of chemical flooding and densification synergistic efficiency according to claim 3, 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.

5. The method for calculating the recovery factor of chemical flooding and densification synergistic efficiency according to claim 4, characterized in that: The method of obtaining the longitudinal sweep coefficient of the well network to be measured based on the well relationship data and the formation characteristic data includes: According to the 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, E H represents the longitudinal sweep coefficient of the well network to be measured; a1, a2, a3, a4, D, E, F represent the correlation coefficients with the well network; j represents the layer number; Y represents the empirical coefficient; d i Indicates the well spacing; R″ f ″ j 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 reservoir permeability variation coefficient; ΔP ave It indicates the average injection-production pressure difference between wells within a layer.

6. The method for calculating the recovery factor of chemical flooding and densification synergistic efficiency according to claim 5, characterized in that: The relative permeability data include any one of the following or any combination thereof: irreducible water saturation, residual oil saturation, water flooding front saturation, water content when the water flooding front reaches the outlet, water phase index, oil phase index, water content; and / or, The oil displacement efficiency of the well network to be measured is obtained according to 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, E d Indicates the oil displacement efficiency of the well network to be tested; S wc Represents bound water saturation; S or represents residual oil saturation; w and b represent process parameters; S wf Indicates the saturation of the water flooding front; f wf It indicates the water content when the water drive front reaches the outlet end; n w Indicates the water phase index, n o Indicates the oil phase index, f w Indicates moisture content.

7. The method for calculating the recovery factor of chemical flooding and densification synergistically enhancing the efficiency according to claim 6, characterized in that: The method of obtaining the recovery factor of the well network to be measured according to the plane sweep coefficient, the longitudinal sweep coefficient and the oil displacement efficiency of the well network to be measured comprises: According to the plane sweep coefficient, longitudinal sweep coefficient and oil displacement efficiency of the well network to be measured, the recovery factor of the well network to be measured is obtained through the fourth expression, wherein the fourth expression is: AND R =And AZ AND H AND d , In the fourth expression, E R Indicates the recovery factor of the well network to be tested, E AZ Indicates the plane sweep coefficient of the well network to be measured; E H Indicates the longitudinal sweep coefficient of the well network to be tested; E d Indicates the oil recovery efficiency of the well network to be tested.

8. A recovery factor calculation system based on chemical flooding and infill synergy enhancement, characterized in that: include: The data acquisition module is used to obtain the well-to-well relationship data, well group characteristic data, stratum characteristic data, and phase permeability data of the well network to be tested 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 according to the well relationship data and the well group characteristic data; The module for obtaining the longitudinal sweep coefficient is used to obtain the longitudinal sweep coefficient of the well network to be measured according to the well relationship data and the formation characteristic data; The oil recovery efficiency obtaining module is used to obtain the oil recovery efficiency of the well network to be tested 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 according to the plane sweep coefficient, longitudinal sweep coefficient and oil displacement efficiency of the well network to be measured.

9. 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 enhancing chemical flooding and encryption as described in any one of claims 1 to 8 is implemented.

10. 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, the method for calculating the recovery factor of synergistic chemical flooding and encryption as described in any one of claims 1 to 8 is implemented.

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