Reservoir protection judgment method, device, equipment and medium

Abstract

The embodiment of the invention discloses a reservoir protection judgment method and device, equipment and a medium. The method comprises the following steps: determining a first crude oil yield after reservoir pollution and a second crude oil yield before reservoir pollution for a target drilling well; determining a first profit value according to the first crude oil yield and the crude oil unit price, and determining a second profit value according to the second crude oil yield, the crude oil unit price and the reservoir protection cost; and according to the first income value and the second income value, whether reservoir protection is carried out on the target drilling well or not is judged. According to the technical scheme provided by the embodiment of the invention, the economic benefits generated by the single well before pollution and after pollution under different skin coefficients and stable production time are comprehensively compared by introducing various expenses of the reservoir protection measures, so that whether to carry out quantitative analysis on the reservoir protection measures is realized, and the method has important significance on storage increase and production increase of an oil field.

Description

Technical Field

[0001] The present application relates to the field of petroleum exploration, and in particular to a reservoir protection determination method, device, equipment and medium. Background Art

[0002] With the continuous deepening of development, the reservoir formation pressure will decrease year by year. Continuing to use the drilling fluid density at the beginning of the drilling operation for construction will inevitably lead to a large amount of solid phase entering the reservoir. The undegradable barite will block the cracks and pores, causing reservoir pollution and seriously affecting the production of single wells. Therefore, the application of reservoir protection measures in blocks with serious reservoir pollution is an important means to help old oil fields increase and stabilize production. The main measures taken by various oil fields to address reservoir pollution include: optimizing the drilling fluid system, optimizing the wellbore structure, acid fracturing, etc., but the application cost of the above measures is relatively high, and it is unknown whether they are economical after large-scale application in oil fields. At the same time, the size of the skin coefficient and the stable production time of a single well will also affect the economic feasibility of adopting reservoir protection measures. Summary of the invention

[0003] The present application provides a reservoir protection determination method, device, equipment and medium. By introducing various costs of reservoir protection measures, the economic benefits of single wells before and after pollution are comprehensively compared under different skin coefficients and stable production times, and a quantitative analysis of whether to carry out reservoir protection measures is achieved, which is of great significance to the increase of reserves and production of oil fields.

[0004] According to one aspect of the present application, a reservoir protection determination method is provided, which is applied to a reservoir protection determination device, wherein the reservoir protection determination device is arranged at a well site, and comprises:

[0005] For the target well, determine the first crude oil production after reservoir contamination and the second crude oil production before reservoir contamination;

[0006] Determine a first income value according to the first crude oil production and crude oil unit price, and determine a second income value according to the second crude oil production, crude oil unit price and reservoir protection costs;

[0007] Whether reservoir protection is performed for the target well is determined based on the first benefit value and the second benefit value.

[0008] According to another aspect of the present application, a reservoir protection determination device is provided, comprising:

[0009] A production determination module, for determining a first crude oil production after reservoir contamination and a second crude oil production before reservoir contamination for a target well;

[0010] a revenue calculation module, configured to determine a first revenue value according to the first crude oil production and the crude oil unit price, and to determine a second revenue value according to the second crude oil production, the crude oil unit price and the reservoir protection fee;

[0011] The reservoir protection determination module is used to determine whether reservoir protection is performed for the target well according to the first benefit value and the second benefit value.

[0012] According to another aspect of the present application, a reservoir protection determination device is provided, the device comprising:

[0013] at least one processor; and

[0014] a memory communicatively connected to at least one processor; wherein,

[0015] The memory stores a computer program that can be executed by at least one processor. The computer program is executed by at least one processor so that the at least one processor can execute the reservoir protection determination method of any embodiment of the present application.

[0016] According to another aspect of the present application, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the reservoir protection determination method of any embodiment of the present application when executed.

[0017] The technical solution of the embodiment of the present application determines the first crude oil production after reservoir pollution and the second crude oil production before reservoir pollution for the target drilling, determines the first income value according to the first crude oil production and the crude oil unit price, and determines the second income value according to the second crude oil production, the crude oil unit price and the reservoir protection fee, and determines whether the target drilling should perform reservoir protection based on the first income value and the second income value. The technical solution of the embodiment of the present application, by introducing various costs of reservoir protection measures and comprehensively comparing the economic benefits generated by single wells before and after pollution under different skin coefficients and stable production times, realizes a quantitative analysis of whether to carry out reservoir protection measures, which is of great significance to the increase of reserves and production of oil fields.

[0018] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present application, nor is it intended to limit the scope of the present application. Other features of the present application will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 is a flow chart of a reservoir protection determination method provided according to Example 1 of the present application;

[0021] Figure 2 is a flow chart of a reservoir protection determination method provided according to Example 2 of the present application;

[0022] Figure 3 This is a bar chart of economic benefits generated under different skin coefficients provided in Example 2 of the present application;

[0023] Figure 4 It is a structural schematic diagram of a reservoir protection determination device provided according to the third embodiment of the present application;

[0024] Figure 5 It is a structural schematic diagram of a reservoir protection determination device provided in Example 4 of the present application. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0026] It should be noted that the terms "first", "second", "third", "fourth", "actual", "preset", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0027] Embodiment 1

[0028] Figure 1 This is a flow chart of a reservoir protection determination method provided in Example 1 of the present application. The present application embodiment can be applied to the situation of determining drilling benefits. The method can be executed by a reservoir protection determination device, which can be implemented in the form of hardware and / or software. The reservoir protection determination device can be configured in a reservoir protection determination device, and the reservoir protection determination device is set in a well site and / or a base data center.

[0029] like Figure 1 As shown, the reservoir protection determination method of this embodiment includes:

[0030] S110. For a target well, determine a first crude oil production after reservoir pollution and a second crude oil production before reservoir pollution.

[0031] In the embodiments of the present application, in the field of oil drilling, reservoir pollution refers to the use of drilling fluid density for construction in the early stage of drilling operations, which will cause a large number of solid particles to enter the reservoir. The solid particles include low-density rock cuttings and soil and high-density barite. The non-degradable barite blocks cracks and pores, hindering oil production, causing reservoir pollution, and seriously affecting the oil production of a single well.

[0032] It is understandable that the oil production of the contaminated reservoir is generally lower than that of the reservoir before the contamination. The oil production of the contaminated reservoir is recorded as the first crude oil production, and the oil production of the contaminated reservoir is recorded as the second crude oil production.

[0033] Specifically, determining a first crude oil production after reservoir pollution and a second crude oil production before reservoir pollution comprises the following steps:

[0034] For target wells, determine the average permeability of the reservoir;

[0035] Determine the first crude oil production according to the average permeability and geological parameters, and the skin factor of the target well; wherein the geological parameters include the total effective thickness of the oil layer of the target well, underground liquid viscosity, original formation pressure, bottom hole flow pressure, supply radius and bottom hole radius;

[0036] The second crude oil production is determined based on the average permeability and geological parameters.

[0037] Among them, reservoir permeability refers to the ability of liquid in rock to pass through a unit area of ​​rock in a unit time. It is a value used to measure the ability of fluid to pass through the effective pores of porous rock under pressure difference, expressed as K. For target drilling, determining the average permeability of the reservoir can help geologists and petroleum engineers judge the flow performance of stored liquids (such as oil and natural gas) in the formation, thereby evaluating the reservoir quality and exploitability of the formation. Geological parameters include the total effective thickness of the oil layer of the target drilling, underground liquid viscosity, original formation pressure, bottom hole flow pressure, supply radius and bottom hole radius. The skin factor of the target drilling is an indicator reflecting the degree of pollution of the oil well.

[0038] S120. Determine a first profit value according to the first crude oil production and crude oil unit price, and determine a second profit value according to the second crude oil production, crude oil unit price and reservoir protection costs.

[0039] In the embodiment of the present application, the first crude oil production is the crude oil production after the well is polluted during the drilling process, and the second crude oil production is the normal crude oil production before the well is polluted, which is calculated by a formula. The first benefit value can be understood as the economic benefit generated by oil extraction under a polluted state, and the second benefit value can be understood as the economic benefit generated by protecting the reservoir of the polluted well to achieve the economic benefit generated by oil extraction under a normal, unpolluted state. The reservoir protection cost is the cost required to increase the wellbore structure by one opening, and is related to the casing cost, drilling fluid cost, cementing cost, drill bit cost, comprehensive drilling daily fee, and construction days required for an additional opening.

[0040] Specifically, determining a first income value according to the first crude oil production and crude oil unit price, and determining a second income value according to the second crude oil production, crude oil unit price and reservoir protection costs, includes the following steps:

[0041] The product of the first crude oil output, the crude oil unit price and the number of stable production days is used as the first income value;

[0042] Determining a second income value according to the second crude oil production, crude oil unit price and reservoir protection costs includes:

[0043] The product of the second crude oil output, the crude oil unit price and the number of stable production days is used as the crude oil revenue value;

[0044] The difference between the crude oil revenue value and the reservoir protection fee is used as the second revenue value.

[0045] In the embodiment of the present application, the cost calculation formula required for increasing the wellbore structure by one opening is as follows:

[0046] C=Ca+D+C e +B+D a *X

[0047] C is the cost of optimizing the wellbore structure for an additional opening, ￥; Ca is the casing cost required for an additional opening, ￥; D is the drilling fluid cost, ￥; Ce is the cementing cost, ￥; B is the drill bit cost, ￥; Da is the comprehensive daily drilling fee, ￥; X is the number of construction days, X days.

[0048] It should be noted that the construction days are the time X required to apply the reservoir protection method and technology. Regardless of whether the target well is protected by reservoir or not, as long as the target well is put into production, the stable production days of the target well are Y.

[0049] Without adopting the reservoir protection method, the economic value generated by the target well after stable production for Y days is the first benefit value calculation formula as follows:

[0050] W1=Q1*Y*A

[0051] W1 is the first profit value, Q1 is the first crude oil output, Y is the number of days of stable production, and A is the unit price of crude oil, ￥;

[0052] After adopting the high reservoir protection method, the economic benefits generated by the target well after stable production for Y days are the second benefit value calculation formula as follows:

[0053] W2=Q2*Y*AC

[0054] W2 is the second revenue value, and Q2 is the second crude oil output.

[0055] S130: Determine whether to perform reservoir protection for the target well according to the first benefit value and the second benefit value.

[0056] In the embodiment of the present application, a feasibility analysis of the reservoir protection method is carried out based on the first benefit value and the second benefit value. The variable in the reservoir protection analysis method is the skin coefficient of the oil well. The second benefit value calculated based on the second crude oil production before pollution can be equivalent to the benefit value after the implementation of reservoir protection measures for the target drilling. When the first benefit value is greater than or equal to the second benefit value, it can be understood that the economic benefit generated by oil extraction under a polluted state is greater than the net economic benefit after the implementation of reservoir protection measures, indicating that the reservoir pollution is relatively light, and reservoir protection measures can be omitted, and the original technology can continue to be used for drilling; when the first benefit value is less than the second benefit value, it can be understood that the economic benefit generated by oil extraction under a polluted state is less than the net economic benefit after the implementation of reservoir protection measures, indicating that the reservoir pollution is relatively serious and the single well production is significantly reduced. It is recommended to adopt reservoir protection measures to help stabilize the production of single wells.

[0057] Specifically, judging whether to perform reservoir protection on the target well according to the first benefit value and the second benefit value includes the following steps:

[0058] If the first benefit value is greater than or equal to the second benefit value, determining not to perform reservoir protection on the target well;

[0059] If the first benefit value is less than the second benefit value, it is determined to perform reservoir protection on the target well.

[0060] In the embodiment of the present application, a feasibility analysis of the reservoir protection method is carried out according to the first benefit value and the second benefit value. The variable in the reservoir protection analysis method is the skin coefficient of the oil well. When the first benefit value is greater than or equal to the second benefit value, it can be understood that the economic benefit generated by oil extraction under a polluted state is greater than the net economic benefit after the implementation of reservoir protection measures, indicating that the reservoir pollution is relatively light, and reservoir protection measures may not be adopted, and the original technology can continue to be used for drilling; when the first benefit value is less than the second benefit value, it can be understood that the economic benefit generated by oil extraction under a polluted state is less than the net economic benefit after the implementation of reservoir protection measures, indicating that the reservoir pollution is relatively serious, and the single well production has been significantly reduced. It is recommended to adopt reservoir protection measures to help stabilize the production of single wells.

[0061] The embodiments of the present application disclose a reservoir protection determination method, device, equipment and medium. The method includes: for a target well, determining a first crude oil production after reservoir pollution and a second crude oil production before reservoir pollution; determining a first revenue value based on the first crude oil production and crude oil unit price, and determining a second revenue value based on the second crude oil production, crude oil unit price and reservoir protection costs; determining whether reservoir protection is performed for the target well based on the first revenue value and the second revenue value. The technical solution of the embodiment of the present application, by introducing various costs of reservoir protection measures, comprehensively compares the economic benefits generated by single wells before and after pollution under different skin coefficients and stable production times, realizes a quantitative analysis of whether to carry out reservoir protection measures, which is of great significance to the increase of reserves and production of oil fields.

[0062] Embodiment 2

[0063] Figure 2 This is a flow chart of a reservoir protection determination method provided in Example 2 of this application. This embodiment of the application is optimized based on the above embodiment. For solutions not described in detail in the embodiment of this application, please refer to the above embodiment. Figure 2 As shown, the method of the embodiment of the present application specifically includes the following steps:

[0064] S210. Determine the average permeability of the reservoir for the target well.

[0065] In the embodiments of the present application, reservoir permeability refers to the ability of liquid in rock to pass through a unit area of ​​rock in a unit time. It is a value used to measure the ability of fluid to pass through the effective pores of porous rock under pressure difference, and is represented by K. The average permeability is determined based on the permeability and effective thickness of each sublayer of the target drilling, and the number of sublayers opened by oil. The average permeability reflects an indicator of the concentration trend of the permeability of each sublayer of the target drilling. For the target drilling, determining the average permeability of the reservoir can help geologists and petroleum engineers judge the flow properties of liquids (such as oil and natural gas) stored in the formation, thereby evaluating the reservoir quality and developability of the formation.

[0066] Specifically, for a target well, determining the average permeability of a reservoir includes the following steps:

[0067] For each reservoir of the target well, determine the product of the permeability of each reservoir and the effective thickness of the reservoir;

[0068] The ratio of the sum of the products corresponding to each reservoir to the sum of the effective thicknesses of each reservoir is taken as the average permeability of the reservoir.

[0069] According to the above, the average permeability of the target well section is determined based on the following formula:

[0070]

[0071] K is the average permeability, mD; K i is the permeability of the ith layer, mD; H i is the effective thickness of the ith small layer, m; n is the number of small layers opened by the oil well.

[0072] S220: Determine the first crude oil production after reservoir contamination based on the average permeability and geological parameters and the skin factor of the target well.

[0073] In the embodiment of the present application, the geological parameters include the total effective thickness of the oil layer of the target well, the viscosity of the underground liquid, the original formation pressure, the bottom hole flow pressure, the supply radius and the bottom hole radius. The skin coefficient of the target well is an indicator reflecting the degree of pollution of the oil well. The oil production after pollution is determined based on the geological parameters and the average permeability calculated, and the skin coefficient of the oil well as the first crude oil production.

[0074] Specifically, determining the first crude oil production according to the average permeability, geological parameters and skin factor of the target wellbore comprises the following steps:

[0075] The first crude oil production is determined based on the following formula:

[0076]

[0077] Among them, Q1 is the first crude oil production, S is the skin coefficient of the target well, K is the average permeability, H is the total effective thickness of the oil layer of the target well, μ is the underground fluid viscosity, Pe is the original formation pressure, Pw is the bottom hole flow pressure, Re is the supply radius, and Rw is the bottom hole radius.

[0078] S230: Determine the second crude oil production before reservoir contamination according to the average permeability, geological parameters and skin factor of the target well.

[0079] Specifically, according to the average permeability, geological parameters and skin factor of the target well, determining the second crude oil production before reservoir contamination includes the following steps:

[0080] The second crude oil production is determined based on the following formula:

[0081]

[0082] Among them, Q2 is the second crude oil production.

[0083] S240. Determine a first profit value according to the first crude oil production and the crude oil unit price, and determine a second profit value according to the second crude oil production, the crude oil unit price and reservoir protection costs.

[0084] In the embodiment of the present application, the first crude oil production is the crude oil production after the well is polluted during the drilling process, and the second crude oil production is the normal crude oil production before the pollution is calculated by a formula. In this embodiment, the first benefit value can be understood as the economic benefit generated by oil extraction under a polluted state, and the second benefit value can be understood as the economic benefit generated by protecting the reservoir of the polluted well to achieve the economic benefit generated by oil extraction under a normal and unpolluted state. The reservoir protection cost is the cost required to increase the wellbore structure by one opening, and is related to the casing cost, drilling fluid cost, cementing cost, drill bit cost, comprehensive drilling daily fee and construction days required for an additional opening.

[0085] S250: Determine whether to perform reservoir protection for the target well according to the first benefit value and the second benefit value.

[0086] In the embodiment of the present application, a feasibility analysis of the reservoir protection method is carried out according to the first benefit value and the second benefit value. The variable in the reservoir protection analysis method is the skin coefficient of the oil well. When the first benefit value is greater than or equal to the second benefit value, it can be understood that the economic benefit generated by oil extraction under a polluted state is greater than the net economic benefit after the implementation of reservoir protection measures, indicating that the reservoir pollution is relatively light, and reservoir protection measures may not be adopted, and the original technology can continue to be used for drilling; when the first benefit value is less than the second benefit value, it can be understood that the economic benefit generated by oil extraction under a polluted state is less than the net economic benefit after the implementation of reservoir protection measures, indicating that the reservoir pollution is relatively serious, and the single well production has been significantly reduced. It is recommended to adopt reservoir protection measures to help stabilize the production of single wells.

[0087] The embodiment of the present application discloses a reservoir protection determination method, device, equipment and medium. The method includes: determining the average permeability of the reservoir for the target well; determining the first crude oil production after reservoir pollution according to the average permeability and geological parameters, and the skin coefficient of the target well; determining the second crude oil production before reservoir pollution according to the average permeability, geological parameters and the skin coefficient of the target well; determining the first income value according to the first crude oil production and the unit price of crude oil, and determining the second income value according to the second crude oil production, the unit price of crude oil and the cost of reservoir protection; determining whether the target well is to perform reservoir protection according to the first income value and the second income value. The technical solution of the embodiment of the present application, by introducing various costs of reservoir protection measures, comprehensively compares the economic benefits generated by single wells before and after pollution under different skin coefficients and stable production times, realizes the quantitative analysis of whether to carry out reservoir protection measures, which is of great significance to the increase of reserves and production of oil fields.

[0088] In the embodiments of the present application, for example, the determination of whether to perform reservoir protection is further described in detail in combination with the following charts and examples.

[0089] The history of wells drilled on site from 2020 to 2023 is collected to obtain the effective thickness Hi and permeability Ki, underground liquid viscosity μ, original formation pressure Pe, bottom hole flow pressure Pw, supply radius Re, bottom hole radius Rw, skin coefficient S, casing Ca required to add one opening, drilling fluid D, cementing Ce and drill bit cost B, comprehensive drilling daily cost Da and stable production years Y of each target sublayer, comprehensively compare the economic feasibility of reservoir protection analysis methods under different skin coefficients, and draw charts.

[0090] Table 1 shows the effective thickness and permeability of each sub-layer of the target layer. The average permeability K of the target well section is calculated by the formula The average permeability of the target layer was calculated and found to be 3799.29 mD.

[0091] Effective Thickness and Permeability of Each Sub-layer in the Target Layer

[0092] Small layer Effective thickness(m) Permeability (mD) 1 6.2 1509 2 1.3 2172 3 0.6 509 4 0.7 701 5 5.3 2326 6 7.2 4403 7 2.6 5673 8 3.7 2568 9 4.2 4562 10 7.5 5892 11 8.9 4328

[0093] Through calculation, under normal circumstances, the first crude oil production is 338.53 m3 / d.

[0094] Through calculation, the second crude oil production under different skin factors is shown in Table 2 below. Table 2 shows the single-well production and economic benefits at different skin factors (taking a 2-month cycle as an example). The single-well production at different skin factors corresponds to the first crude oil production Q1, and the cumulative economic benefits correspond to the first benefit value W1.

[0095] Table 2 Single-Well Production and Economic Benefits at Different Skin Factors (Taking a 2-Month Cycle as an Example)

[0096]

[0097] The cost required to increase one drilling operation and optimize the wellbore structure, combined with the actual situation on site, is calculated through the formula C = Ca + D + Ce + B + Da*X. The cost of increasing one drilling operation and optimizing the wellbore structure is 13.9 million RMB.

[0098] Combined with the economic benefits generated by comprehensively comparing Q1 and Q2 considering the life of the production wells on site, and draw a chart. Taking production for 2 months, crude oil price of 80 US dollars / barrel, and US dollar exchange rate of 7.1 as an example for calculation, the cumulative economic benefits generated by the second crude oil production Q2 are 72.566 million yuan. The difference between the Q2 crude oil benefit value and the reservoir protection cost is used as the second benefit value W2, which is 58.666 million yuan. The first benefit value W1 accumulated by Q1 under different skin factors is shown in Table 2.

[0099] As Figure 3 shown, based on the first benefit value W1 and the second benefit value W2, a feasibility analysis of whether to carry out reservoir protection methods for the target drilling is conducted. The dotted line is the dividing line. On the right side of the dotted line, when the skin factor is greater than 1, the first benefit value W1 generated by exploitation under the polluted state is less than the second benefit value W2 after implementing reservoir protection measures. When W1 < W2, in this case, it is recommended to adopt reservoir protection measures to help the single well maintain stable production.

[0100] Example 3

[0101] Figure 4 This is a schematic structural diagram of a reservoir protection determination device provided by an embodiment of the present application. This embodiment is applicable to the situation of determining reservoir protection for a specified drilling in oil exploration. The reservoir protection determination device can be implemented in the form of hardware and / or software, and the reservoir protection determination device can be configured in any electronic device with network communication functions.

[0102] like Figure 4 As shown, the reservoir protection determination device of this embodiment includes the following:

[0103] A production determination module 310 is used to determine, for a target well, a first crude oil production after reservoir contamination and a second crude oil production before reservoir contamination;

[0104] A revenue calculation module 320, configured to determine a first revenue value according to the first crude oil production and the crude oil unit price, and to determine a second revenue value according to the second crude oil production, the crude oil unit price and the reservoir protection fee;

[0105] The reservoir protection determination module 330 is used to determine whether to perform reservoir protection on the target well according to the first benefit value and the second benefit value.

[0106] Based on the device technical solution provided in the above embodiment, specifically, the production module 310 is determined to include:

[0107] For target wells, determine the average permeability of the reservoir;

[0108] Determine the first crude oil production according to the average permeability and geological parameters; wherein the geological parameters include the total effective thickness of the oil layer of the target well, underground fluid viscosity, original formation pressure, bottom hole flow pressure, supply radius and bottom hole radius;

[0109] The second crude oil production is determined based on the average permeability, geological parameters and skin factor of the target well.

[0110] Based on the device technical solution provided in the above embodiment, specifically, for the target well, determining the average permeability of the reservoir includes:

[0111] For each reservoir of the target well, determine the product of the permeability of each reservoir and the effective thickness of the reservoir;

[0112] The ratio of the sum of the products corresponding to each reservoir to the sum of the effective thicknesses of each reservoir is taken as the average permeability of the reservoir.

[0113] Based on the device technical solution provided in the above embodiment, specifically, according to the average permeability, geological parameters and skin factor of the target well, determining the first crude oil production includes:

[0114] The first crude oil production is determined based on the following formula:

[0115]

[0116] Among them, Q1 is the first crude oil production, and S is the skin coefficient of the target well.

[0117] Based on the device technical solution provided in the above embodiment, specifically, determining the second crude oil production according to the average permeability and geological parameters includes:

[0118] The second crude oil production is determined based on the following formula:

[0119]

[0120] Wherein, Q2 is the first crude oil production, K is the average permeability, H is the total effective thickness of the oil layer of the target well, μ is the underground fluid viscosity, Pe is the original formation pressure, Pw is the bottom hole flow pressure, Re is the supply radius, and Rw is the bottom hole radius;

[0121] Based on the device technical solution provided in the above embodiment, specifically, the process of determining the reservoir protection fee includes:

[0122] Determine the comprehensive drilling cost based on the comprehensive daily drilling cost and the number of construction days;

[0123] The reservoir protection cost is determined based on the comprehensive drilling cost, casing cost, drilling fluid cost, cementing cost and drill bit cost.

[0124] Based on the device technical solution provided in the above embodiment, specifically, the revenue calculation module 320 includes:

[0125] The product of the first crude oil output, the crude oil unit price and the number of stable production days is taken as the first profit value.

[0126] Determining a second income value according to the second crude oil production, crude oil unit price and reservoir protection costs includes:

[0127] The product of the second crude oil output, the crude oil unit price and the number of stable production days is used as the crude oil revenue value;

[0128] The difference between the crude oil revenue value and the reservoir protection fee is used as the second revenue value.

[0129] Based on the device technical solution provided in the above embodiment, specifically, the reservoir protection determination module 330 includes:

[0130] If the first benefit value is greater than or equal to the second benefit value, determining not to perform reservoir protection on the target well;

[0131] If the first benefit value is less than the second benefit value, it is determined to perform reservoir protection on the target well.

[0132] The embodiments of the present application disclose a reservoir protection determination method, device, equipment and medium. The method includes: for a target well, determining a first crude oil production after reservoir pollution and a second crude oil production before reservoir pollution; determining a first revenue value based on the first crude oil production and crude oil unit price, and determining a second revenue value based on the second crude oil production, crude oil unit price and reservoir protection costs; determining whether reservoir protection is performed for the target well based on the first revenue value and the second revenue value. The technical solution of the embodiment of the present application, by introducing various costs of reservoir protection measures, comprehensively compares the economic benefits generated by single wells before and after pollution under different skin coefficients and stable production times, realizes a quantitative analysis of whether to carry out reservoir protection measures, which is of great significance to the increase of reserves and production of oil fields.

[0133] The reservoir protection determination device provided in the embodiment of the present invention can execute the reservoir protection determination method provided in any embodiment of the present invention mentioned above, and has the corresponding functions and beneficial effects of executing the reservoir protection determination method. For detailed process, please refer to the relevant operations of the reservoir protection determination method in the above embodiment.

[0134] Embodiment 4

[0135] Figure 5 The structural schematic diagram of the reservoir protection determination device 10 that can be used to implement the embodiment of the present application is shown. The reservoir protection determination device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workbenches, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The reservoir protection determination device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present application described and / or required herein.

[0136] like Figure 5As shown, the reservoir protection determination device 10 includes at least one processor 11, and a memory connected to the at least one processor 11, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 to the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the reservoir protection determination device 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other through a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0137] A plurality of components in the reservoir protection determination device 10 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the reservoir protection determination device 10 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0138] The processor 11 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as a reservoir protection determination method.

[0139] In some embodiments, the reservoir protection determination method may be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed on the reservoir protection determination device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the reservoir protection determination method described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to execute the reservoir protection determination method in any other appropriate manner (e.g., by means of firmware).

[0140] Various embodiments of the systems and techniques described above herein can be implemented in digital reservoir protection determination circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include: being implemented in one or more computer programs, which can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a dedicated or general programmable processor, which can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0141] The computer programs for implementing the methods of the present application may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer or other programmable reservoir protection determination device, so that when the computer programs are executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer programs may be executed entirely on the machine, partially on the machine, partially on the machine as a stand-alone software package and partially on a remote machine, or entirely on a remote machine or server.

[0142] In the context of the present application, a computer readable storage medium may be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, device, or apparatus. A computer readable storage medium may include, but is not limited to, a magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or apparatus for reservoir protection determination, or any suitable combination of the foregoing. Alternatively, a computer readable storage medium may be a machine readable signal medium. More specific examples of machine readable storage media may include electrical connections based on one or more lines, portable computer disks, hard disks, random access memories (RAM), read-only memories (ROM), erasable programmable read-only memories (EPROM or flash memory), optical fibers, portable compact disk read-only memories (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0143] To provide interaction with a user, the systems and techniques described herein may be implemented on a reservoir protection determination device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball), through which a user can provide input to the reservoir protection determination device. Other types of devices may also be used to provide interaction with a user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0144] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0145] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0146] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps recorded in this application can be executed in parallel, sequentially or in different orders, as long as the information expected by the technical solution of this application can be achieved, and this document is not limited here.

[0147] The above specific implementations do not constitute a limitation on the protection scope of this application. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of this application should be included in the protection scope of this application.

Claims

1. A reservoir protection determination method, characterized in that: The method comprises: For the target well, determine the first crude oil production after reservoir contamination and the second crude oil production before reservoir contamination; Determine a first income value according to the first crude oil production and crude oil unit price, and determine a second income value according to the second crude oil production, crude oil unit price and reservoir protection costs; Whether reservoir protection is performed for the target well is determined based on the first benefit value and the second benefit value.

2. The method according to claim 1, characterized in that For the target well, determine the first crude oil production after reservoir contamination and the second crude oil production before reservoir contamination, including: For target wells, determine the average permeability of the reservoir; Determine the first crude oil production according to the average permeability and geological parameters; wherein the geological parameters include the total effective thickness of the oil layer of the target well, underground fluid viscosity, original formation pressure, bottom hole flow pressure, supply radius and bottom hole radius; The second crude oil production is determined based on the average permeability, geological parameters and skin factor of the target well.

3. The method according to claim 2, characterized in that Determining the first crude oil production according to the average permeability, geological parameters and skin factor of the target wellbore includes: The first crude oil production is determined based on the following formula: Among them, Q1 is the first crude oil production, and S is the skin coefficient of the target well. Determining the second crude oil production according to the average permeability and geological parameters includes: The second crude oil production is determined based on the following formula: Among them, Q2 is the second crude oil production, K is the average permeability, H is the total effective thickness of the oil layer of the target drilling, μ is the underground liquid viscosity, Pe is the original formation pressure, Pw is the bottom hole flow pressure, Re is the supply radius, and Rw is the bottom hole radius.

4. The method according to claim 2, characterized in that: For target wells, determine the average permeability of the reservoir, including: For each reservoir of the target well, determine the product of the permeability of each reservoir and the effective thickness of the reservoir; The ratio of the sum of the products corresponding to each reservoir to the sum of the effective thicknesses of each reservoir is taken as the average permeability of the reservoir.

5. The method according to claim 1, characterized in that The process of determining the reservoir protection fee includes: Determine the comprehensive drilling cost based on the comprehensive daily drilling cost and the number of construction days; The reservoir protection cost is determined based on the comprehensive drilling cost, casing cost, drilling fluid cost, cementing cost and drill bit cost.

6. The method according to claim 1, characterized in that Determining a first revenue value according to the first crude oil output and the crude oil unit price includes: The product of the first crude oil output, the crude oil unit price and the number of stable production days is used as the first income value; Determining a second income value according to the second crude oil production, crude oil unit price and reservoir protection costs includes: The product of the second crude oil output, the crude oil unit price and the number of stable production days is used as the crude oil revenue value; The difference between the crude oil revenue value and the reservoir protection fee is used as the second revenue value.

7. The method according to claim 1, characterized in that Determining whether to perform reservoir protection on the target well according to the first benefit value and the second benefit value includes: If the first benefit value is greater than or equal to the second benefit value, determining not to perform reservoir protection on the target well; If the first benefit value is less than the second benefit value, it is determined to perform reservoir protection on the target well.

8. A reservoir protection determination device, characterized in that: The device comprises: A production determination module determines, for a target well, a first crude oil production after reservoir contamination and a second crude oil production before reservoir contamination; a revenue calculation module, which determines a first revenue value according to the first crude oil production and the crude oil unit price, and determines a second revenue value according to the second crude oil production, the crude oil unit price and the reservoir protection fee; The reservoir protection determination module determines whether to perform reservoir protection on the target well according to the first benefit value and the second benefit value.

9. A reservoir protection determination device, characterized in that: The device comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the reservoir protection determination method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the reservoir protection determination method according to any one of claims 1 to 7 when executed.

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