Method and device for estimating the remaining oil distribution area near the fault of oil well
Through the detailed description and numerical simulation of fault block reservoirs and combined with the multiple regression method, an estimation model of the residual oil distribution area at the fault layer of the oil well was established, which solved the problem that the residual oil distribution area of the oil well in the ultra-high water-containing period of fault block reservoirs was difficult to quantitatively estimate, and achieved a fast and quantitative estimation effect.
Patent Information
- Application Number
- CN202110658803.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2021-06-15
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2041-06-15
AI Technical Summary
It is difficult to quickly and quantitatively estimate the residual oil distribution area at the fault layer of the oil wells at the fault block reservoir for ultra-high water-bearing period. Existing research mainly relies on qualitative analysis and complex numerical simulation, and there are many influencing factors and are difficult to accurately calculate.
By conducting fine reservoir descriptions on multiple fault blocks covered by the target zone, a typical geological model was established, and a reservoir numerical simulation calculation was used to calculate the residual oil distribution area when the water content of the oil well reached the threshold. Finally, a multiple regression method was used to establish an estimation model of the residual oil distribution area.
The rapid quantitative estimation of the residual oil distribution area at the fault layer of the oil wells at the ultra-high water-bearing stage of the fault block reservoir is achieved, which simplifies the process and improves the calculation efficiency, and can provide decision-making reference for the potential tapping of the oil well.
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Figure CN113312788B_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the field of oil field development, and in particular relates to a method and a device for estimating the remaining oil distribution area of an oil well near a fault. Background Art
[0002] Due to the complex geological conditions, it is difficult to use a large-scale regular well pattern in the development process of fault-block reservoirs, and a low-injection, high-production well pattern is generally used. A large number of field development practices have verified that even in the stage of ultra-high water cut, there is still a law of residual oil enrichment in the high parts of the structure. The scale of residual oil enrichment in the high parts has an important impact on the adoption of specific potential tapping measures. The existing research on residual oil in high-position oil wells by faults is mainly carried out through research and qualitative analysis of numerical simulation of reservoirs in specific blocks.
[0003] Due to the need to establish an accurate geological model and history matching technology that conforms to the actual block, the existing research process of the remaining oil distribution near the fault of the oil wells in the extremely high water cut period of the fault block reservoir is complicated and takes a long time. Since there are many factors affecting the distribution of the remaining oil near the fault of the oil wells in the extremely high water cut period of the fault block reservoir, it is difficult to calculate the influence of each factor on the remaining oil through an accurate quantitative mathematical relationship. Summary of the invention
[0004] The embodiment of the present application provides a method and device for estimating the remaining oil distribution area of an oil well near a fault, so as to achieve the purpose of rapid quantitative estimation of the remaining oil distribution area of an oil well near a fault during the extremely high water cut period of a fault block reservoir.
[0005] In a first aspect, an embodiment of the present application provides a method for estimating the remaining oil distribution area of an oil well near a fault, comprising:
[0006] S1, carry out detailed reservoir description for multiple fault blocks covered by the target zone, and establish multiple typical geological models representing the reservoir characteristics of the fault blocks in the target zone;
[0007] S2, based on the geological model, using reservoir numerical simulation means to perform reservoir numerical simulation calculations;
[0008] S3, based on the numerical simulation calculation results of the oil reservoir, the remaining oil distribution area of the oil well near the fault is counted when the water content of the oil well reaches the threshold value, and the oil well is an oil well in the extremely high water content period of the fault block reservoir;
[0009] S4, establishing a remaining oil distribution area estimation model based on the geological model established in step S1 and the remaining oil distribution area obtained in step S3.
[0010] Among them, the detailed reservoir description is carried out on multiple fault blocks covered by the target zone, and multiple typical geological models representing the characteristics of the fault block reservoirs in the target zone are established, including:
[0011] A detailed reservoir description is carried out on multiple fault blocks covered by the target zone, and the changing patterns of formation dip, permeability, oil-water viscosity ratio, edge water volume, daily liquid production, injection-production ratio, oil well location, and injection-production well spacing are statistically analyzed. Based on the statistical results, multiple typical geological models representing the characteristics of the fault block reservoirs in the target zone are established.
[0012] The method of establishing a remaining oil distribution area estimation model based on the geological model established in step S1 and the remaining oil distribution area obtained in step S3 includes:
[0013] According to the formation dip, permeability, oil-water viscosity ratio, edge water volume, daily liquid production, injection-production ratio, oil well location, injection-production well spacing corresponding to the geological model established in step S1 and the remaining oil distribution area obtained in step S3, a multivariate regression method is used to establish an estimation expression for the remaining oil distribution area near the fault of the oil well:
[0014]
[0015] The correlation coefficient after regression is: 0.9862; among them,
[0016]
[0017] S is the estimated value of the remaining oil distribution area near the fault of the oil well; S1 is the remaining oil distribution area near the fault of the oil well obtained by regression; x1 is the oil-water viscosity ratio; x2 is the injection-production ratio; x3 is the edge water volume; x4 is the permeability; x5 is the formation inclination; x6 is the injection-production well spacing; x7 is the distance between the oil well and the fault; x8 is the daily liquid production.
[0018] Wherein, the threshold is 95%.
[0019] In a second aspect, the present application provides a device for estimating the remaining oil distribution area of an oil well near a fault, comprising:
[0020] The first establishment unit is used to carry out detailed reservoir description for multiple fault blocks covered by the target zone, and establish multiple typical geological models representing the characteristics of the fault block reservoirs in the target zone;
[0021] A calculation unit, used for performing reservoir numerical simulation calculation based on the geological model and using reservoir numerical simulation means;
[0022] A statistical unit, for calculating the size of the remaining oil distribution area of the oil well near the fault when the water content of the oil well reaches a threshold value based on the numerical simulation calculation result of the oil reservoir, wherein the oil well is an oil well in the extremely high water content period of the fault block reservoir;
[0023] The second establishing unit is used to establish a remaining oil distribution area estimation model based on the geological model established by the first establishing unit and the remaining oil distribution area obtained by the statistical unit.
[0024] Wherein, the first establishing unit is used for:
[0025] A detailed reservoir description is carried out on multiple fault blocks covered by the target zone, and the changing patterns of formation dip, permeability, oil-water viscosity ratio, edge water volume, daily liquid production, injection-production ratio, oil well location, and injection-production well spacing are statistically analyzed. Based on the statistical results, multiple typical geological models representing the characteristics of the fault block reservoirs in the target zone are established.
[0026] Wherein, the second establishing unit is used for:
[0027] According to the formation dip, permeability, oil-water viscosity ratio, edge water volume, daily liquid production, injection-production ratio, oil well location, injection-production well spacing corresponding to the geological model established by the first establishment unit and the remaining oil distribution area obtained by the statistical unit, a multivariate regression method is used to establish an estimation expression for the remaining oil distribution area of the oil well near the fault:
[0028]
[0029] The correlation coefficient after regression is: 0.9862; among them,
[0030]
[0031] S is the estimated value of the remaining oil distribution area near the fault of the oil well; S1 is the remaining oil distribution area near the fault of the oil well obtained by regression; x1 is the oil-water viscosity ratio; x2 is the injection-production ratio; x3 is the edge water volume; x4 is the permeability; x5 is the formation inclination; x6 is the injection-production well spacing; x7 is the distance between the oil well and the fault; x8 is the daily liquid production.
[0032] Wherein, the threshold is 95%.
[0033] In a third aspect, an embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon, which implements the steps of any of the above methods when executed by a processor.
[0034] In a fourth aspect, an embodiment of the present application provides a computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of any of the above methods when executing the program.
[0035] The method and device for estimating the remaining oil distribution area near the fault of the oil well in the embodiment of the present application have the following beneficial effects:
[0036] The method for estimating the remaining oil distribution area of an oil well near a fault of the present application comprises: S1, conducting a detailed reservoir description for multiple fault blocks covered by a target zone, and establishing multiple typical geological models representing the characteristics of the fault block reservoirs in the target zone; S2, based on the geological model, using reservoir numerical simulation means to perform reservoir numerical simulation calculations; S3, based on the results of the reservoir numerical simulation calculations, counting the size of the remaining oil distribution area of the oil well near the fault when the water content of the oil well reaches a threshold, and the oil well is an oil well in the extremely high water content period of the fault block reservoir; S4, establishing a remaining oil distribution area estimation model based on the geological model established in step S1 and the remaining oil distribution area obtained in step S3.
[0037] The present application solves the problem of quantitatively estimating the remaining oil distribution area near the fault in an oil well in a fault-block reservoir with extremely high water cut period; and achieves the purpose of rapidly quantitatively estimating the remaining oil distribution area near the fault in an oil well in a fault-block reservoir with extremely high water cut period.
[0038] The method for estimating the distribution area of remaining oil near faults in oil wells in the extremely high water-cut period of fault-block oil reservoirs provided by the present invention has the characteristics of simple operation, quick calculation and clear objectives, and can intuitively provide a decision-making reference for tapping the potential of remaining oil near faults in oil wells in the extremely high water-cut period of fault-block oil reservoirs. It has very practical engineering application value and can well meet the needs of actual applications. BRIEF DESCRIPTION OF THE DRAWINGS
[0039] Figure 1 It is a schematic diagram of the flow of a method for estimating the remaining oil distribution area near a fault in an oil well according to Example 1;
[0040] Figure 2 This is a schematic flow chart of a method for estimating the remaining oil distribution area near a fault in an oil well according to Example 2;
[0041] Figure 3 This is a schematic diagram of the model validation results in this application;
[0042] Figure 4 This is a schematic diagram of the structure of a device for estimating the remaining oil distribution area near the fault of an oil well in this application;
[0043] Figure 5 This is a schematic diagram of the structure of a computer device according to an embodiment of the present application. DETAILED DESCRIPTION
[0044] The present application is further described below in conjunction with the accompanying drawings and embodiments.
[0045] In the following introduction, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The following introduction provides multiple embodiments of the present invention, and different embodiments can be replaced or combined, so this application can also be considered to include all possible combinations of the same and / or different embodiments recorded. Therefore, if one embodiment includes features A, B, and C, and another embodiment includes features B and D, then this application should also be considered to include embodiments containing one or more of all other possible combinations of A, B, C, and D, even though the embodiment may not be clearly recorded in the following text.
[0046] The following description provides examples and does not limit the scope, applicability or examples set forth in the claims. Changes may be made to the functions and arrangements of the elements described without departing from the scope of the present application. Various processes or components may be appropriately omitted, substituted or added to each example. For example, the described method may be performed in an order different from the order described, and various steps may be added, omitted or combined. In addition, features described in some examples may be combined in other examples.
[0047] Embodiment 1
[0048] like Figure 1 As shown, the method for estimating the remaining oil distribution area near the fault in the oil well of the fault-block reservoir with extremely high water cut in this application includes:
[0049] S1, carry out detailed reservoir description for multiple fault blocks covered by the target zone, and establish multiple typical geological models representing the reservoir characteristics of the fault blocks in the target zone;
[0050] S2, based on the geological model, using reservoir numerical simulation methods, to perform reservoir numerical simulation calculations;
[0051] S3, based on the numerical simulation calculation results of the oil reservoir, the remaining oil distribution area of the oil well near the fault is calculated when the water content of the oil well reaches the threshold, and the oil well is an oil well in the extremely high water content period of the fault block reservoir;
[0052] S4, establishing a remaining oil distribution area estimation model based on the geological model established in step S1 and the remaining oil distribution area obtained in step S3.
[0053] The present application solves the problem of quantitatively estimating the remaining oil distribution area near the fault in an oil well in a fault-block reservoir with extremely high water cut period; and achieves the purpose of rapidly quantitatively estimating the remaining oil distribution area near the fault in an oil well in a fault-block reservoir with extremely high water cut period.
[0054] Embodiment 2
[0055] like Figure 2-3As shown, the method for estimating the remaining oil distribution area of an oil well near a fault in the present application includes steps S11-S4, and each step is described below.
[0056] S11, carry out detailed reservoir description for multiple fault blocks covered by the target area, and establish multiple typical geological models representing the characteristics of the fault block reservoirs in the target area.
[0057] This step includes detailed reservoir description of multiple fault blocks covered by the target zone, statistical analysis of formation dip, permeability, oil-water viscosity ratio, edge water volume, daily liquid production, injection-production ratio, oil well location, injection-production well spacing, and establishment of multiple typical geological models that can represent the characteristics of the fault block reservoirs in the target zone based on the statistical results. The values of various parameters in the model are shown in Table 1.
[0058] Table 1 Values of model parameters
[0059]
[0060]
[0061]
[0062]
[0063] S2, based on the geological model established in step S11, using reservoir numerical simulation means, perform reservoir numerical simulation calculations.
[0064] S3, based on the results of numerical simulation of the reservoir, the size of the remaining oil distribution area near the fault of the oil well is calculated when the water content of the oil well reaches the threshold, and the oil well is an oil well in the extremely high water content period of the fault block reservoir.
[0065] In this step, the threshold is 95%. Based on the geological model established in step S2, the distribution area of the remaining oil in the oil well near the fault is statistically analyzed when the water content of the oil well reaches 95%. The statistical results are shown in Table 2.
[0066] Table 2 Statistical results of residual oil distribution area
[0067] Model Remaining oil area, m2 Model Remaining oil area, m2 Model Remaining oil area, m2 Model Remaining oil area, m2 1 4632 41 11322 81 5603 121 1694 2 2909 42 8903 82 3277 122 1445 3 2123 43 7478 83 2872 123 1412 4 1907 44 6821 84 2353 124 1319 5 1775 45 5958 85 2226 125 1167 6 4599 46 20229 86 4490 126 2496 7 2724 47 17698 87 2713 127 1517 8 2102 48 16158 88 2112 128 1505 9 1885 49 15235 89 1728 129 1395 10 1675 50 14636 90 1578 130 1252 11 4342 51 4690 91 4223 131 9633 12 2506 52 2970 92 2433 132 5215 13 2000 53 2160 93 2028 133 3715 14 1657 54 1997 94 1675 134 2868 15 1635 55 1805 95 1591 135 2484 16 4179 56 4632 96 4276 136 3755 17 2450 57 2909 97 2211 137 1935 18 1881 58 2123 98 1836 138 1323 19 1648 59 1907 99 1269 139 964 20 1602 60 1775 100 1249 140 834 21 4120 61 3769 101 4344 141 4080 22 2320 62 2382 102 2432 142 2265 23 1753 63 1965 103 1911 143 1576 24 1540 64 1594 104 1435 144 1225 25 1498 65 1492 105 1270 145 1116 26 0 66 3506 106 4757 146 5240 27 0 67 2069 107 2905 147 3364 28 0 68 1521 108 2163 148 2715 29 0 69 1388 109 1930 149 2397 30 0 70 1211 110 1877 150 2218 31 636 71 2685 111 4766 151 7225 32 367 72 1734 112 2916 152 5811 33 221 73 1387 113 2235 153 4915 34 89 74 1127 114 1996 154 4480 35 0 75 902 115 1890 155 4069 36 4632 76 6461 116 1241 37 2909 77 4381 117 1188 38 2123 78 3721 118 1083 39 1907 79 3324 119 1019 40 1775 80 2736 120 971
[0068] S4, establishing a remaining oil distribution area estimation model based on the geological model established in step S1 and the remaining oil distribution area obtained in step S3.
[0069] This step includes:
[0070] According to the formation dip, permeability, oil-water viscosity ratio, edge water volume, daily liquid production, injection-production ratio, oil well location, injection-production well spacing corresponding to the geological model established in step S1 and the remaining oil distribution area obtained in step S3, a multivariate regression method is used to establish an estimation expression for the remaining oil distribution area near the fault of the oil well:
[0071]
[0072] The correlation coefficient after regression is: 0.9862; among them,
[0073]
[0074] S is the estimated value of the remaining oil distribution area near the fault of the oil well, m 2 ; S1 is the remaining oil distribution area of the oil well near the fault obtained by regression, m 2 ; x1 is the oil-water viscosity ratio; x2 is the injection-production ratio; x3 is the edge water volume, PV; x4 is the permeability, mD; x5 is the formation dip, °; x6 is the injection-production well spacing, m; x7 is the distance from the oil well to the fault, m; x8 is the daily liquid production, m 3 / d.
[0075] Formula ① can be used to calculate the estimated value of the remaining oil distribution area corresponding to different parameters in step S11, and compared with the remaining oil distribution area value obtained in step S3 for verification. The results are as follows: Figure 2 shown.
[0076] The method for estimating the distribution area of remaining oil near faults in oil wells in the extremely high water-cut period of fault-block oil reservoirs provided by the present invention has the characteristics of simple operation, quick calculation and clear objectives, and can intuitively provide a decision-making reference for tapping the potential of remaining oil near faults in oil wells in the extremely high water-cut period of fault-block oil reservoirs. It has very practical engineering application value and can well meet the needs of actual applications.
[0077] The working principle or operation process of the present application includes: (1) detailed reservoir description and establishment of a typical geological model; (2) numerical simulation of the reservoir; (3) distribution area of remaining oil near the fault of an oil well in a fault-block reservoir with extremely high water content; and (4) establishment of a model for estimating the distribution area of remaining oil.
[0078] The improvements of the present invention include: 1. Establishing multiple typical geological models that can represent the characteristics of the fault block reservoir in the target area; 2. Based on the results of numerical simulation of the reservoir, a multivariate regression method is used to establish a quantitative mathematical relationship between the remaining oil distribution area near the fault in the oil wells of the fault block reservoir with extremely high water content and parameters such as formation inclination, permeability, oil-water viscosity ratio, edge water volume, daily liquid production, injection-production ratio, oil well location, and injection-production well spacing.
[0079] Embodiment 3
[0080] like Figure 4 As shown, the present application provides a device for estimating the remaining oil distribution area of an oil well near a fault, comprising:
[0081] The first establishing unit 201 is used to carry out detailed reservoir description for multiple fault blocks covered by the target zone, and establish multiple typical geological models representing the characteristics of the fault block reservoirs in the target zone;
[0082] The calculation unit 202 is used to perform reservoir numerical simulation calculation based on the geological model and using reservoir numerical simulation means;
[0083] The statistical unit 203 is used to calculate the remaining oil distribution area of the oil well near the fault when the water content of the oil well reaches the threshold value based on the numerical simulation calculation result of the oil reservoir, and the oil well is an oil well in the extremely high water content period of the fault block reservoir;
[0084] The second establishing unit 204 is used to establish a remaining oil distribution area estimation model according to the geological model established by the first establishing unit and the remaining oil distribution area obtained by the statistical unit.
[0085] In some embodiments, the first establishing unit 201 is used to:
[0086] A detailed reservoir description is carried out on multiple fault blocks covered by the target zone, and the changing patterns of formation dip, permeability, oil-water viscosity ratio, edge water volume, daily liquid production, injection-production ratio, oil well location, and injection-production well spacing are statistically analyzed. Based on the statistical results, multiple typical geological models representing the reservoir characteristics of the fault blocks in the target zone are established.
[0087] The second establishing unit 204 is used for:
[0088] According to the formation dip, permeability, oil-water viscosity ratio, edge water volume, daily liquid production, injection-production ratio, oil well location, injection-production well spacing and the remaining oil distribution area obtained by the statistical unit corresponding to the geological model established by the first establishment unit, the multivariate regression method is used to establish the remaining oil distribution area estimation expression near the fault of the oil well:
[0089]
[0090] The correlation coefficient after regression is: 0.9862; among them,
[0091]
[0092] S is the estimated value of the remaining oil distribution area near the fault of the oil well; S1 is the remaining oil distribution area near the fault of the oil well obtained by regression; x1 is the oil-water viscosity ratio; x2 is the injection-production ratio; x3 is the edge water volume; x4 is the permeability; x5 is the formation inclination; x6 is the injection-production well spacing; x7 is the distance between the oil well and the fault; x8 is the daily liquid production.
[0093] In some embodiments, the threshold is 95%.
[0094] In the present application, an embodiment of a device for estimating the remaining oil distribution area of an oil well near a fault is basically similar to an embodiment of a method for estimating the remaining oil distribution area of an oil well near a fault. For relevant matters, please refer to the introduction of the embodiment of the method for estimating the remaining oil distribution area of an oil well near a fault.
[0095] Those skilled in the art can clearly understand that the technical solutions of the embodiments of the present invention can be implemented with the help of software and / or hardware. "Unit" and "module" in this specification refer to software and / or hardware that can independently complete or cooperate with other components to complete specific functions, where the hardware can be, for example, FPGA (Field-Programmable Gate Array), IC (Integrated Circuit), etc.
[0096] Each processing unit and / or module of the embodiment of the present invention may be implemented by an analog circuit that realizes the functions described in the embodiment of the present invention, or may be implemented by software that executes the functions described in the embodiment of the present invention.
[0097] The embodiment of the present invention also provides a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the steps of the method for estimating the remaining oil distribution area of the oil well near the fault are implemented. The computer-readable storage medium may include, but is not limited to, any type of disk, including a floppy disk, an optical disk, a DVD, a CD-ROM, a micro drive, and a magneto-optical disk, a ROM, a RAM, an EPROM, an EEPROM, a DRAM, a VRAM, a flash memory device, a magnetic card or an optical card, a nano system (including a molecular memory IC), or any type of medium or device suitable for storing instructions and / or data.
[0098] Figure 5 This is a schematic diagram of the structure of the computer device according to the embodiment of the present application. Figure 5 As shown, the computer device of the present application is, for example, a laptop computer, a desktop computer, a workbench, a personal digital assistant, a server, a blade server, a mainframe computer, and other suitable computers. The computer device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices and other similar computing devices. The computer device of the present application includes a processor 401, a memory 402, an input device 403 and an output device 404. The processor 401, the memory 402, the input device 403 and the output device 404 can be connected by a bus 405 or other means. The memory 402 stores a computer program, which can be run on the processor 401, and the processor 401 implements the above-mentioned method steps for estimating the remaining oil distribution area of the oil well near the fault when executing the program.
[0099] The input device 403 can receive input digital or character information, and generate key signal input related to user settings and function control of the data processing computer device, such as a touch screen, a keypad, a mouse, a track pad, a touch pad, an indicator bar, one or more mouse buttons, a trackball, a joystick, etc. The output device 404 may include a display device, an auxiliary lighting device (e.g., an LED), and a tactile feedback device (e.g., a vibration motor). The display device may include, but is not limited to, a liquid crystal display (LCD), a light emitting diode (LED) display, a plasma display, and a touch screen.
[0100] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as: multiple units or components can be combined, or can be integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the components shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.
[0101] In the embodiments of the present invention, all functional units may be integrated into one processing unit, or each unit may be separately used as a unit, or two or more units may be integrated into one unit; the above-mentioned integrated units may be implemented in the form of hardware or in the form of hardware plus software functional units.
[0102] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A method for estimating the remaining oil distribution area near a fault in an oil well, characterized in that: include: S1, carry out detailed reservoir description for multiple fault blocks covered by the target zone, and establish multiple typical geological models representing the characteristics of the fault block reservoirs in the target zone; including: carry out detailed reservoir description for multiple fault blocks covered by the target zone, statistically analyze the variation patterns of formation dip, permeability, oil-water viscosity ratio, edge water volume, daily liquid production, injection-production ratio, oil well location, and injection-production well spacing, and establish multiple typical geological models representing the characteristics of the fault block reservoirs in the target zone based on the statistical results; S2, based on the geological model, using reservoir numerical simulation means to perform reservoir numerical simulation calculations; S3, based on the numerical simulation calculation results of the oil reservoir, the remaining oil distribution area of the oil well near the fault is counted when the water content of the oil well reaches the threshold value, and the oil well is an oil well in the extremely high water content period of the fault block reservoir; S4, establishing a remaining oil distribution area estimation model according to the geological model established in step S1 and the remaining oil distribution area obtained in step S3; comprising: establishing an estimation expression for the remaining oil distribution area near the fault of the oil well by using a multivariate regression method according to the formation dip angle, permeability, oil-water viscosity ratio, edge water volume, daily liquid production, injection-production ratio, oil well location, injection-production well spacing and the remaining oil distribution area obtained in step S3 corresponding to the geological model established in step S1: The correlation coefficient after regression is: 0.9862; among them, S is the estimated value of the remaining oil distribution area near the fault of the oil well; S1 is the remaining oil distribution area near the fault of the oil well obtained by regression; x1 is the oil-water viscosity ratio; x2 is the injection-production ratio; x3 is the edge water volume; x4 is the permeability; x5 is the formation inclination; x6 is the injection-production well spacing; x7 is the distance between the oil well and the fault; x8 is the daily liquid production.
2. The method for estimating the remaining oil distribution area of an oil well near a fault according to claim 1, characterized in that: The threshold is 95%.
3. A device for estimating the remaining oil distribution area near a fault in an oil well, characterized in that: include: The first establishment unit is used to carry out detailed reservoir description for multiple fault blocks covered by the target zone, and establish multiple typical geological models representing the characteristics of the fault block reservoirs in the target zone; Carry out detailed reservoir description for multiple fault blocks covered by the target zone, statistically analyze the variation patterns of formation dip, permeability, oil-water viscosity ratio, edge water volume, daily liquid production, injection-production ratio, oil well location, and injection-production well spacing, and establish multiple typical geological models representing the characteristics of the fault block reservoirs in the target zone based on the statistical results; A calculation unit, used for performing reservoir numerical simulation calculation based on the geological model and using reservoir numerical simulation means; A statistical unit, for calculating the size of the remaining oil distribution area of the oil well near the fault when the water content of the oil well reaches a threshold value based on the numerical simulation calculation result of the oil reservoir, wherein the oil well is an oil well in the extremely high water content period of the fault block reservoir; The second establishing unit is used to establish a remaining oil distribution area estimation model according to the geological model established by the first establishing unit and the remaining oil distribution area obtained by the statistical unit; according to the formation dip, permeability, oil-water viscosity ratio, edge water volume, daily liquid production, injection-production ratio, oil well location, injection-production well spacing corresponding to the geological model established by the first establishing unit and the remaining oil distribution area obtained by the statistical unit, a multivariate regression method is used to establish an estimation expression for the remaining oil distribution area near the fault of the oil well: The correlation coefficient after regression is: 0.9862; among them, S is the estimated value of the remaining oil distribution area near the fault of the oil well; S1 is the remaining oil distribution area near the fault of the oil well obtained by regression; x1 is the oil-water viscosity ratio; x2 is the injection-production ratio; x3 is the edge water volume; x4 is the permeability; x5 is the formation inclination; x6 is the injection-production well spacing; x7 is the distance between the oil well and the fault; x8 is the daily liquid production.
4. The device for estimating the remaining oil distribution area near the fault of an oil well according to claim 3, characterized in that: The threshold is 95%.
5. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the method described in any one of claims 1 to 2 are implemented.
6. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the steps of the method according to any one of claims 1 to 2 are implemented.
Citation Information
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