Unconformity surface reservoir control bottom limit determination method, device and equipment and storage medium

Abstract

The invention discloses an unconformity surface reservoir control bottom limit determination method, device and equipment and a storage medium. The method comprises the steps that oil reservoir geologic features of a target area are obtained, and the horizon of an unconformity surface is determined according to the oil reservoir geologic features; according to the while-drilling data, the logging data and the single-well drilling and completion data associated with the horizon of the unconformity surface, the vertical distance between the single-well oil and gas reservoir section and the unconformity surface is determined; determining the incidence relation between the vertical distance and the oil and gas reservoir occurrence state evaluation index matched with each karst area type; and according to the association relationship, determining an unconformity surface hiding control threshold of the target area. According to the technical scheme, the problem of low reliability of determination of the unconformity surface reservoir control bottom limit is solved, and corresponding technical support is provided for benefit exploration and development and potential zone optimization of the carbonate reservoir while the prediction accuracy of the unconformity surface reservoir control bottom limit is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of oil reservoir development, and in particular to a method, a device, an electronic device and a storage medium for determining an unconformity surface reservoir control bottom limit. Background Art

[0002] Carbonate rocks contain abundant oil and gas resources. Faults and unconformities are important channels for oil and gas migration. The lateral migration range of oil and gas along unconformities has a very important influence on the vertical oil and gas accumulation height. For karst zones with different reservoir geological characteristics, the bottom limit of unconformities controlling oil and gas reservoir migration is also significantly different, which seriously restricts the efficient exploration and development of this type of reservoir. Therefore, the study of the bottom limit of carbonate unconformities controlling reservoirs is particularly important.

[0003] At present, the main research program for the unconformity surface controlling the scale of reservoir development in the carbonate rock field is to determine the main controlling factors of reservoir genesis in the karst zone through field outcrops, single well actual drilling core data, reservoir regional geological background and diagenesis information. For the research on the reservoir control limit, a relatively systematic geochemical analysis of source rocks and oil and gas samples is usually carried out, and a systematic analysis of burial history, thermal evolution history and fluid activity history is combined to obtain the reservoir control limit of the unconformity surface.

[0004] However, for ultra-deep reservoirs, no single well has encountered source rocks, and the research results based on data from other regions have certain limitations and cannot meet the needs of efficient exploration and development of this type of oil and gas reservoirs. Therefore, how to reliably determine the bottom limit of carbonate unconformity surface control can provide technical support for efficient exploration and development of carbonate reservoirs and optimization of potential zones, which has become an urgent problem that technicians in this field need to solve. Summary of the invention

[0005] The present invention provides a method, device, equipment and storage medium for determining the bottom limit of unconformity surface reservoir control, so as to solve the problem of low reliability in determining the bottom limit of unconformity surface reservoir control in carbonate rocks. It can improve the prediction accuracy of the bottom limit of unconformity surface reservoir control and provide corresponding technical support for the efficient exploration and development of carbonate oil reservoirs and the optimization of potential zones.

[0006] According to one aspect of the present invention, a method for determining the bottom limit of reservoir controlled by unconformity is provided, the method comprising:

[0007] Obtain the reservoir geological characteristics of the target area and determine the position of the unconformity surface based on the reservoir geological characteristics;

[0008] Determine the vertical distance from the oil and gas producing layer of a single well to the unconformity surface based on the drilling data, logging data and single well drilling and completion data associated with the unconformity surface.

[0009] Determine the correlation between the vertical distance and the evaluation index of the occurrence state of the oil and gas reservoirs matching the types of the karst areas; wherein the evaluation index of the occurrence state of the oil and gas reservoirs matching the types of the karst areas is determined in advance based on the detection data of the stratum association of the unconformity surface;

[0010] Based on the correlation, the bottom limit of reservoir controlled by the unconformity surface in the target area is determined.

[0011] According to another aspect of the present invention, a device for determining the bottom limit of unconformity-controlled reservoir is provided, the device comprising:

[0012] The layer determination module is used to obtain the reservoir geological characteristics of the target area and determine the layer of the unconformity surface based on the reservoir geological characteristics;

[0013] A vertical distance determination module is used to determine the vertical distance from the oil and gas producing layer section of a single well to the unconformity surface based on the drilling data, logging data and single well drilling and completion data associated with the layer position of the unconformity surface;

[0014] A correlation determination module is used to determine the correlation between the vertical distance and the oil and gas reservoir occurrence state evaluation index matching each karst area type; wherein the oil and gas reservoir occurrence state evaluation index matching each karst area type is determined in advance based on the detection data of the stratum association of the unconformity surface;

[0015] The reservoir control bottom limit determination module is used to determine the reservoir control bottom limit of the unconformity surface in the target area based on the association relationship.

[0016] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising:

[0017] at least one processor; and

[0018] a memory communicatively connected to the at least one processor; wherein,

[0019] 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 method for determining the bottom limit of unconformity-controlled reservoirs described in any embodiment of the present invention.

[0020] According to another aspect of the present invention, 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 method for determining the bottom limit of unconformity-controlled reservoirs as described in any embodiment of the present invention when executed.

[0021] The technical solution of the embodiment of the present invention obtains the reservoir geological characteristics of the target area, and determines the stratum of the unconformity surface according to the reservoir geological characteristics; then determines the vertical distance from the oil and gas producing layer section of a single well to the unconformity surface according to the drilling data, logging data and single well drilling and completion data associated with the stratum of the unconformity surface; then determines the correlation between the vertical distance and the oil and gas reservoir occurrence state evaluation index matching the type of each karst area; finally, according to the correlation, determines the unconformity control bottom limit of the target area. This technical solution solves the problem of low reliability in determining the unconformity control bottom limit of carbonate rocks, and can provide corresponding technical support for the efficient exploration and development of carbonate oil reservoirs and the optimization of potential zones while improving the accuracy of predicting the unconformity control bottom limit.

[0022] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 This is a flow chart of a method for determining the bottom limit of reservoir controlled by an unconformity surface provided in accordance with the first embodiment of the present invention;

[0025] Figure 2A This is a flow chart of a method for determining the bottom limit of reservoir controlled by an unconformity surface provided in accordance with the second embodiment of the present invention;

[0026] Figure 2B is a seismic profile of the X oil field provided according to the second embodiment of the present invention;

[0027] Figure 2C It is a schematic diagram of the intersection analysis of the daily oil production of each single well in the interlayer karst area and the vertical distance according to the second embodiment of the present invention;

[0028] Figure 2D It is a schematic diagram of the intersection analysis of the daily oil production and the vertical distance of the oil test matching the interlayer karst zone provided in the second embodiment of the present invention;

[0029] Figure 3 2 is a schematic diagram of the structure of a device for determining the bottom limit of unconformity-controlled reservoirs provided in accordance with Embodiment 3 of the present invention;

[0030] Figure 4It is a structural schematic diagram of an electronic device for implementing the method for determining the bottom limit of unconformity surface control reservoir according to an embodiment of the present invention. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0032] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention 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 invention 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. The acquisition, storage, use, processing, etc. of data in the technical solution of this application comply with the relevant provisions of national laws and regulations.

[0033] Embodiment 1

[0034] Figure 1 A flowchart of a method for determining the bottom limit of unconformity surface control is provided for the first embodiment of the present invention. This embodiment can be applied to the prediction scenario of the bottom limit of unconformity surface control. The method can be executed by a device for determining the bottom limit of unconformity surface control. The device can be implemented in the form of hardware and / or software, and the device can be configured in an electronic device. Figure 1 As shown, the method includes:

[0035] S110, obtaining reservoir geological characteristics of the target area, and determining the stratum of the unconformity surface according to the reservoir geological characteristics.

[0036] This solution can determine the geological characteristics of the reservoir through the geological data and seismic data of the target area. Specifically, the unconformity layer within the developed reservoir range of the target area is determined based on the reservoir geological background of the target area. By interpreting and analyzing the seismic data of the target area, the unconformity layer of the entire target area can be determined based on the unconformity layer within the developed reservoir range.

[0037] S120, determining the vertical distance from the oil and gas producing layer section of the single well to the unconformity surface based on the while drilling data, well logging data and single well drilling and completion data associated with the strata of the unconformity surface.

[0038] After the position of the unconformity is determined, the drilling data, logging data, mud logging data and single well drilling and completion data of the area where the unconformity is located are obtained. According to the drilling data, mud logging data and single well drilling and completion data associated with the position of the unconformity, the vertical distance from the oil and gas producing layer section of the single well to the unconformity can be calculated. Specifically, according to the drilling data and mud logging data, by identifying the typical sedimentary background and rock cuttings characteristics, the lateral depth and vertical depth of the unconformity actually encountered by the single well can be determined. According to the single well drilling and completion data, the lateral depth and vertical depth of the bottom of the oil layer actually encountered by the single well can be determined. According to the vertical depth of the unconformity actually encountered by the single well and the vertical depth of the bottom of the oil layer actually encountered by the single well, the vertical distance from the oil and gas producing layer section of the single well to the unconformity can be determined. It can be understood that the difference between the vertical depth of the unconformity actually encountered by the single well and the vertical depth of the bottom of the oil layer actually encountered by the single well is the vertical distance from the oil and gas producing layer section of the single well to the unconformity.

[0039] In a preferred solution, the single well oil test layer section can also be determined based on the single well oil test data, and the lateral depth and vertical depth of the single well oil test bottom can be obtained by statistical analysis. The single well completion bottom depth and the depth value of the bottom of the oil test layer section can be compared and analyzed. For oil wells with both parameters, the bottom data of the oil test layer section can be selected as the bottom of the oil-producing layer section. For oil wells without oil test layer section data, the bottom of the oil well completion bottom can be selected as the bottom of the oil-producing layer section.

[0040] S130. Determine the correlation between the vertical distance and the oil and gas reservoir occurrence state evaluation index matching each karst area type.

[0041] Among them, the evaluation index of the occurrence state of oil and gas reservoirs matching the types of karst areas is determined in advance based on the detection data associated with the strata of the unconformity surface. The detection data may include oil test and production test data, fluid property detection data, and abnormal data of gas logging while drilling. According to the detection data of each single well, the evaluation index of the occurrence state of oil and gas reservoirs of each single well can be determined, and then according to the type of karst area to which each single well belongs, the evaluation index of the occurrence state of oil and gas reservoirs matching the type of karst area can be determined. The types of karst areas may include buried hill karst areas, interlayer karst areas, and fault-controlled karst areas. The evaluation index of the occurrence state of oil and gas reservoirs may include indicators such as the oil production, gas production, the percentage of the cumulative oil production in the stage to the cumulative oil and gas equivalent production in the stage, the total hydrocarbon content, the C1 content, and the C2+ content of the actual target layer encountered by the single well.

[0042] After determining the reservoir occurrence status evaluation indexes matching each karst area type, the vertical distance is cross-analyzed with the reservoir occurrence status evaluation indexes matching each karst area type to obtain the correlation between the vertical distance and the reservoir occurrence status evaluation indexes matching each karst area type.

[0043] S140. Determine the bottom limit of the reservoir controlled by the unconformity surface in the target area according to the correlation relationship.

[0044] After obtaining the correlation between the vertical distance and the oil and gas reservoir occurrence status evaluation index matching each karst area type, the vertical distance from the oil and gas producing layer section of the single well to the unconformity surface can be determined based on the correlation relationship on the basis of the known karst area type of the single well and at least one oil and gas reservoir occurrence status evaluation index, thereby obtaining the bottom limit of the unconformity surface controlling the reservoir in the target area.

[0045] The technical solution of the embodiment of the present invention obtains the reservoir geological characteristics of the target area, and determines the stratum of the unconformity surface according to the reservoir geological characteristics; then determines the vertical distance from the oil and gas producing layer section of a single well to the unconformity surface according to the drilling data, logging data and single well drilling and completion data associated with the stratum of the unconformity surface; then determines the correlation between the vertical distance and the oil and gas reservoir occurrence state evaluation index matching the type of each karst area; finally, according to the correlation, determines the unconformity control bottom limit of the target area. This technical solution solves the problem of low reliability in determining the unconformity control bottom limit of carbonate rocks, and can provide corresponding technical support for the efficient exploration and development of carbonate oil reservoirs and the optimization of potential zones while improving the accuracy of predicting the unconformity control bottom limit.

[0046] Embodiment 2

[0047] Figure 2A This is a flow chart of a method for determining the bottom limit of an unconformity surface provided in the second embodiment of the present invention. This embodiment is based on the above embodiment and is refined. Figure 2A As shown, the method includes:

[0048] S210, obtaining reservoir geological characteristics of the target area, and determining the stratum of the unconformity surface according to the reservoir geological characteristics.

[0049] This plan takes the X oilfield as an example to illustrate the process of determining the bottom limit of unconformity surface control. Figure 2B is a seismic profile of the X oil field provided according to the second embodiment of the present invention, such as Figure 2B As shown in the figure, the Yijianfang Formation of the Ordovician in the carbonate reservoir of the X oil field is a set of parallel unconformities in the region.

[0050] S220, determining the depth of the unconformity surface encountered by the single well according to the drilling data and well logging data associated with the strata of the unconformity surface.

[0051] S230. Determine the bottom depth of the well for oil and production testing of the single well according to the single well drilling and completion data associated with the strata of the unconformity surface.

[0052] The depth of the unconformity encountered by a single well in the X oil field and the depth of the oil-testing interval of a single well after drilling are shown in Table 1.

[0053] Table 1:

[0054]

[0055] S240. Determine the vertical distance from the oil and gas producing layer of a single well to the unconformity surface based on the depth of the unconformity surface encountered by the single well and the bottom depth of the well during oil and gas testing and production testing.

[0056] As shown in Table 1, based on the depth of the unconformity encountered by a single well and the depth of the oil-testing layer section of a single well, the vertical distance from the oil and gas producing layer section of a single well to the unconformity can be calculated, that is, the distance from the unconformity in Table 1.

[0057] S250. Determine the correlation between the vertical distance and the oil and gas reservoir occurrence state evaluation index matching each karst area type.

[0058] In this solution, optionally, the process of determining the evaluation index of the occurrence state of oil and gas reservoirs matching the types of karst areas includes:

[0059] Determine the evaluation index of the oil and gas reservoir occurrence state of the single well according to the detection data; wherein the detection data includes oil test and production test data and abnormal gas logging data while drilling;

[0060] According to the evaluation index of oil and gas reservoir occurrence state of single well, the evaluation index of oil and gas reservoir occurrence state matching each karst area type is determined.

[0061] It is understandable that the detection data may include oil test and production test data and abnormal gas logging data while drilling. Based on the oil test and production test data and abnormal gas logging data while drilling, the oil and gas reservoir occurrence state evaluation index of a single well can be determined. According to the reservoir characteristics encountered by a single well, the type of karst area to which the single well belongs can be determined in advance. According to the type of karst area to which the single well belongs and the oil and gas reservoir occurrence state evaluation index of the single well, the oil and gas reservoir occurrence state evaluation index of the single well of different karst area types can be statistically classified to obtain the oil and gas reservoir occurrence state evaluation index matching each karst area type.

[0062] In a feasible solution, the determination of the evaluation index of the occurrence state of oil and gas reservoirs matching the types of karst areas includes:

[0063] According to the reservoir characteristics encountered by a single well, the type of karst area to which the single well belongs is determined; the types of karst areas include buried hill karst areas, interlayer karst areas and fault-controlled karst areas;

[0064] According to the oil and gas reservoir occurrence state evaluation index of the single well and the karst area type to which the single well belongs, the oil and gas reservoir occurrence state evaluation index matching each karst area type is determined.

[0065] On the basis of the above scheme, the oil and gas reservoir occurrence state assessment index includes at least one of oil production, gas production, cumulative oil production ratio, total hydrocarbon content, first carbon compound content and second carbon compound content;

[0066] Determining the evaluation index of the occurrence state of oil and gas reservoirs based on the detection data includes:

[0067] Based on the test oil and production data, the oil production, gas production and cumulative oil production ratio are determined, and based on the abnormal gas logging data while drilling, the total hydrocarbon content, the first carbon compound content and the second carbon compound content are determined.

[0068] The oil test and production test data of each single well in the X oilfield are shown in Table 2, and the abnormal data of gas logging while drilling of each single well in the X oilfield are shown in Table 3.

[0069] It is easy to understand that the oil production may include the daily oil production converted from the single well oil test, the gas production may include the daily gas production converted from the single well oil test, the cumulative oil production percentage may include the percentage of the cumulative oil production of a stage to the cumulative oil and gas equivalent of the stage, the first carbon compound content may include the C1 content of different target layer sections during the single well drilling process, and the second carbon compound content may include the C2+ content of different target layer sections during the single well drilling process.

[0070] According to the oil test and production test data of each single well, the daily oil production, daily gas production, and the percentage of the cumulative oil production in the stage to the cumulative oil and gas equivalent production in the stage can be determined. According to the abnormal gas logging data while drilling of each single well, the total hydrocarbon content, C1 content and C2+ content of different target layers during the drilling process of the single well can be determined.

[0071] Table 2:

[0072]

[0073] Table 3:

[0074]

[0075] In a preferred solution, the method of determining the oil and gas reservoir occurrence state evaluation index matching each karst area type according to the oil and gas reservoir occurrence state evaluation index of the single well and the karst area type to which the single well belongs includes:

[0076] According to the type of karst area to which the single well belongs, the single wells of each karst area type are determined;

[0077] Each karst area type is taken as the target karst area type in turn, and the oil and gas reservoir occurrence state evaluation index matched by each single well in the target karst area type and the measured depth corresponding to the oil and gas reservoir occurrence state evaluation index are calculated.

[0078] After determining the single wells of each karst area type, the single well oil and gas reservoir occurrence state evaluation index of each karst area type can be depth-weighted according to the depth from the unconformity surface. The specific calculation method of the oil and gas reservoir occurrence state evaluation index matching the target karst area type can be as follows:

[0079] Among them, A represents the evaluation index of oil and gas reservoir occurrence state matching the target karst area type, A1, A2…A n Indicators of the occurrence status of oil and gas reservoirs in each single well representing the target karst area type, D1, D2…D n Indicates the measurement depth corresponding to the evaluation index of oil and gas reservoir occurrence status of each single well.

[0080] The evaluation indicators of oil and gas reservoir occurrence status of each single well in X Oilfield are shown in Table 4.

[0081] Table 4:

[0082]

[0083] Figure 2C This is a schematic diagram of the intersection analysis of the daily oil production of each single well in the interlayer karst area and the vertical distance according to the second embodiment of the present invention. Figure 2D 1 is a schematic diagram of the intersection analysis of the daily oil production of the oil test and the vertical distance matched in the interlayer karst zone according to the second embodiment of the present invention. Taking the correlation between the vertical distance of the interlayer karst zone and the daily oil production of the oil test as an example, the daily oil production of the oil test of each single well in the interlayer karst zone and the vertical distance are directly intersected and analyzed to obtain the following: Figure 2C The scatter plot shown is based on Figure 2C The scattered point distribution shown in the figure is difficult to fit the correlation between the daily oil production of the oil test and the vertical distance. After the daily oil production of the oil test of each single well in the interlayer karst area is processed by depth weighted average, the intersection analysis of the daily oil production of the oil test and the vertical distance matching the interlayer karst area is performed to obtain Figure 2D Therefore, this scheme is conducive to accurately and reliably locating the correlation between the evaluation index of oil and gas reservoir occurrence state and the vertical distance, thereby ensuring the feasibility of predicting the bottom limit of unconformity surface control.

[0084] In this embodiment, the determination of the correlation between the vertical distance and the oil and gas reservoir occurrence state evaluation index matching each karst area type includes:

[0085] If the number of reservoir occurrence state evaluation indicators matching the target karst area type is greater than 1, the vertical distance and the reservoir occurrence state evaluation indicators matching the target karst area type are sequentially cross-analyzed to obtain the correlation between the vertical distance and the reservoir occurrence state evaluation indicators matching the target karst area type.

[0086] It should be noted that the number of reservoir occurrence state evaluation indicators that match the target karst area type can be one or more. If the number of reservoir occurrence state evaluation indicators that match the target karst area type is more than one, the vertical distance is sequentially intersected with each reservoir occurrence state evaluation indicator that matches the target karst area type, and a correlation chart of the vertical distance and each reservoir occurrence state evaluation indicator is drawn to obtain the correlation between the vertical distance and the reservoir occurrence state evaluation indicator that matches the target karst area type.

[0087] S260. Determine the bottom limit of the reservoir controlled by the unconformity surface in the target area based on the correlation relationship.

[0088] The above scheme fully considers various dynamic and static data such as the geological background of the reservoir area, seismic inversion data, the depth of the unconformity encountered by the oil well, the completion depth, the bottom depth of the test well section, the test oil and production data, the fluid analysis and testing data, and the gas logging anomaly data. On the basis of making full use of the dynamic and static characteristics of the actual development wells, the production characteristics of various oil wells controlled by the unconformity are systematically analyzed, and the trend is predicted based on this, so as to obtain the bottom limit of the carbonate rock unconformity. Through the full integration of multiple disciplines and multiple data, the research results of this scheme are directly related to all the production wells that have been drilled and put into production, which can solve the actual production problems that the oil field is concerned about, and can provide important technical support for the efficient exploration and development of similar areas.

[0089] The technical solution of the embodiment of the present invention obtains the reservoir geological characteristics of the target area, and determines the stratum of the unconformity surface according to the reservoir geological characteristics; then determines the vertical distance from the oil and gas producing layer section of a single well to the unconformity surface according to the drilling data, logging data and single well drilling and completion data associated with the stratum of the unconformity surface; then determines the correlation between the vertical distance and the oil and gas reservoir occurrence state evaluation index matching the type of each karst area; finally, according to the correlation, determines the unconformity control bottom limit of the target area. This technical solution solves the problem of low reliability in determining the unconformity control bottom limit of carbonate rocks, and can provide corresponding technical support for the efficient exploration and development of carbonate oil reservoirs and the optimization of potential zones while improving the accuracy of predicting the unconformity control bottom limit.

[0090] Embodiment 3

[0091] Figure 3 This is a schematic diagram of the structure of a device for determining the bottom limit of unconformity surface reservoir control provided in the third embodiment of the present invention. Figure 3As shown, the device comprises:

[0092] The layer determination module 310 is used to obtain the reservoir geological characteristics of the target area and determine the layer of the unconformity surface according to the reservoir geological characteristics;

[0093] A vertical distance determination module 320 is used to determine the vertical distance from the oil and gas producing layer section of a single well to the unconformity surface based on the drilling data, logging data and single well drilling and completion data associated with the layer position of the unconformity surface;

[0094] The correlation determination module 330 is used to determine the correlation between the vertical distance and the oil and gas reservoir occurrence state evaluation index matching each karst area type; wherein the oil and gas reservoir occurrence state evaluation index matching each karst area type is determined in advance based on the detection data of the stratum association of the unconformity surface;

[0095] The reservoir control bottom limit determination module 340 is used to determine the reservoir control bottom limit of the unconformity surface in the target area according to the association relationship.

[0096] In this solution, optionally, the vertical distance determination module 320 is specifically used to:

[0097] Determine the depth of the unconformity encountered by a single well based on the drilling data and logging data associated with the unconformity layer.

[0098] Determine the bottom depth of the well for oil and production testing based on the single well drilling and completion data associated with the unconformity surface;

[0099] According to the depth of the unconformity surface encountered by the single well and the bottom depth of the single well for oil and gas testing and production, the vertical distance from the oil and gas producing section of the single well to the unconformity surface is determined.

[0100] In a feasible solution, the device further includes an indicator determination model, and the indicator determination model includes:

[0101] A single well index determination unit is used to determine the oil and gas reservoir occurrence state evaluation index of a single well according to the detection data; wherein the detection data includes oil test and production test data and abnormal gas logging data while drilling;

[0102] The karst area type index determination unit is used to determine the oil and gas reservoir occurrence state evaluation index matching each karst area type according to the oil and gas reservoir occurrence state evaluation index of the single well.

[0103] On the basis of the above scheme, optionally, the oil and gas reservoir occurrence state assessment index includes at least one of oil production, gas production, cumulative oil production ratio, total hydrocarbon content, first carbon compound content and second carbon compound content;

[0104] The single well index determination unit is specifically used for:

[0105] Based on the test oil and production data, the oil production, gas production and cumulative oil production ratio are determined, and based on the abnormal gas logging data while drilling, the total hydrocarbon content, the first carbon compound content and the second carbon compound content are determined.

[0106] Optionally, the karst area type index determination unit includes:

[0107] The karst area type determination subunit is used to determine the karst area type to which a single well belongs according to the reservoir characteristics encountered by the single well; the karst area types include buried hill karst area, interlayer karst area and fault-controlled karst area;

[0108] The karst area type index determination subunit is used to determine the oil and gas reservoir occurrence state evaluation index matching each karst area type according to the oil and gas reservoir occurrence state evaluation index of the single well and the karst area type to which the single well belongs.

[0109] In a preferred solution, the karst area type indicator determination subunit is specifically used for:

[0110] According to the type of karst area to which the single well belongs, the single wells of each karst area type are determined;

[0111] Each karst area type is taken as the target karst area type in turn, and the oil and gas reservoir occurrence state evaluation index matched by each single well in the target karst area type and the measured depth corresponding to the oil and gas reservoir occurrence state evaluation index are calculated.

[0112] Based on the above solution, optionally, the association relationship determination module 330 is specifically used to:

[0113] If the number of reservoir occurrence state evaluation indicators matching the target karst area type is greater than 1, the vertical distance and the reservoir occurrence state evaluation indicators matching the target karst area type are sequentially cross-analyzed to obtain the correlation between the vertical distance and the reservoir occurrence state evaluation indicators matching the target karst area type.

[0114] The device for determining the bottom limit of unconformity surface control of reservoirs provided in the embodiment of the present invention can execute the method for determining the bottom limit of unconformity surface control of reservoirs provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0115] Embodiment 4

[0116] Figure 4A schematic diagram of an electronic device 410 that can be used to implement an embodiment of the present invention is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device may 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 invention described and / or required herein.

[0117] like Figure 4 As shown, the electronic device 410 includes at least one processor 411, and a memory connected to the at least one processor 411 in communication, such as a read-only memory (ROM) 412, a random access memory (RAM) 413, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 411 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 412 or the computer program loaded from the storage unit 418 to the random access memory (RAM) 413. In the RAM 413, various programs and data required for the operation of the electronic device 410 can also be stored. The processor 411, the ROM 412, and the RAM 413 are connected to each other via a bus 414. An input / output (I / O) interface 415 is also connected to the bus 414.

[0118] Multiple components in the electronic device 410 are connected to the I / O interface 415, including: an input unit 416, such as a keyboard, a mouse, etc.; an output unit 417, such as various types of displays, speakers, etc.; a storage unit 418, such as a disk, an optical disk, etc.; and a communication unit 419, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 419 allows the electronic device 410 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0119] The processor 411 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the processor 411 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 411 executes the various methods and processes described above, such as the method for determining the bottom limit of the unconformity surface.

[0120] In some embodiments, the method for determining the bottom limit of unconformity-controlled reservoirs may be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 418. In some embodiments, part or all of the computer program may be loaded and / or installed on the electronic device 410 via the ROM 412 and / or the communication unit 419. When the computer program is loaded into the RAM 413 and executed by the processor 411, one or more steps of the method for determining the bottom limit of unconformity-controlled reservoirs described above may be performed. Alternatively, in other embodiments, the processor 411 may be configured to execute the method for determining the bottom limit of unconformity-controlled reservoirs in any other appropriate manner (e.g., by means of firmware).

[0121] Various implementations of the systems and techniques described above herein can be implemented in digital electronic 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 implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that 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.

[0122] The computer programs for implementing the method of the present invention 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 unconformity surface control and bottom limit determination device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0123] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in combination with an instruction execution system, device or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0124] To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the 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).

[0125] 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.

[0126] 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.

[0127] 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 described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0128] The above specific implementations do not constitute a limitation on the protection scope of the present invention. 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 modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for determining the bottom limit of unconformity surface reservoir, characterized in that: The method comprises: Obtain the reservoir geological characteristics of the target area and determine the position of the unconformity surface based on the reservoir geological characteristics; Determine the vertical distance from the oil and gas producing layer of a single well to the unconformity surface based on the drilling data, logging data and single well drilling and completion data associated with the unconformity surface. Determine the correlation between the vertical distance and the evaluation index of the occurrence state of the oil and gas reservoirs matching the types of the karst areas; wherein the evaluation index of the occurrence state of the oil and gas reservoirs matching the types of the karst areas is determined in advance based on the detection data of the stratum association of the unconformity surface; Based on the correlation, the bottom limit of reservoir controlled by the unconformity surface in the target area is determined.

2. The method according to claim 1, characterized in that Determining the vertical distance from the oil and gas producing layer section of a single well to the unconformity surface based on the drilling data, logging data and single well drilling and completion data associated with the strata of the unconformity surface includes: Determine the depth of the unconformity encountered by a single well based on the drilling data and logging data associated with the unconformity layer. Determine the bottom depth of the well for oil and production testing based on the single well drilling and completion data associated with the unconformity surface; According to the depth of the unconformity surface encountered by the single well and the bottom depth of the single well for oil and gas testing and production, the vertical distance from the oil and gas producing section of the single well to the unconformity surface is determined.

3. The method according to claim 1, characterized in that The process of determining the evaluation index of the occurrence state of oil and gas reservoirs matching the types of karst areas includes: Determine the evaluation index of the oil and gas reservoir occurrence state of the single well according to the detection data; wherein the detection data includes oil test and production test data and abnormal gas logging data while drilling; According to the evaluation index of oil and gas reservoir occurrence state of single well, the evaluation index of oil and gas reservoir occurrence state matching each karst area type is determined.

4. The method according to claim 3, characterized in that The oil and gas reservoir occurrence state assessment index includes at least one of oil production, gas production, cumulative oil production ratio, total hydrocarbon content, first carbon compound content and second carbon compound content; Determining the evaluation index of the oil and gas reservoir occurrence state of a single well based on the detection data includes: Based on the oil test and production test data, the oil production, gas production and cumulative oil production ratio of a single well are determined, and based on the abnormal gas logging data while drilling, the total hydrocarbon content, the first carbon compound content and the second carbon compound content are determined.

5. The method according to claim 3, characterized in that: Determining the oil and gas reservoir occurrence state evaluation index matching each karst area type based on the oil and gas reservoir occurrence state evaluation index of the single well includes: According to the reservoir characteristics encountered by a single well, the type of karst area to which the single well belongs is determined; the types of karst areas include buried hill karst areas, interlayer karst areas and fault-controlled karst areas; According to the oil and gas reservoir occurrence state evaluation index of the single well and the karst area type to which the single well belongs, the oil and gas reservoir occurrence state evaluation index matching each karst area type is determined.

6. The method according to claim 5, characterized in that The method of determining the oil and gas reservoir occurrence state evaluation index matching each karst area type according to the oil and gas reservoir occurrence state evaluation index of the single well and the karst area type to which the single well belongs includes: According to the type of karst area to which the single well belongs, the single wells of each karst area type are determined; Each karst area type is taken as the target karst area type in turn, and the oil and gas reservoir occurrence state evaluation index matched by each single well in the target karst area type and the measured depth corresponding to the oil and gas reservoir occurrence state evaluation index are calculated.

7. The method according to claim 6, characterized in that The determination of the correlation between the vertical distance and the evaluation index of the occurrence state of the oil and gas reservoirs matching the types of the karst areas includes: If the number of reservoir occurrence state evaluation indicators matching the target karst area type is greater than 1, the vertical distance and the reservoir occurrence state evaluation indicators matching the target karst area type are sequentially cross-analyzed to obtain the correlation between the vertical distance and the reservoir occurrence state evaluation indicators matching the target karst area type.

8. A device for determining the bottom limit of unconformity surface reservoir, characterized in that: include: The layer determination module is used to obtain the reservoir geological characteristics of the target area and determine the layer of the unconformity surface based on the reservoir geological characteristics; A vertical distance determination module is used to determine the vertical distance from the oil and gas producing layer section of a single well to the unconformity surface based on the drilling data, logging data and single well drilling and completion data associated with the layer position of the unconformity surface; A correlation determination module is used to determine the correlation between the vertical distance and the evaluation index of the occurrence state of oil and gas reservoirs matching the types of each karst area; The reservoir control bottom limit determination module is used to determine the reservoir control bottom limit of the unconformity surface in the target area based on the association relationship.

9. An electronic device, characterized in that: The electronic 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 perform the method for determining the bottom limit of unconformity-controlled reservoirs 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 method for determining the bottom limit of unconformity surface control according to any one of claims 1 to 7 when executed.

Images