Method and system for depicting optimal oil and gas enrichment area based on strike-slip fracture

Abstract

The invention provides a method and system for depicting an optimal oil gas enrichment area based on strike-slip fracture, and belongs to the technical field of oil exploration and development, and the method comprises the following specific steps: S1, calibrating a drilled well, and selecting an auxiliary layer according to a calibration result; s2, performing coherence calculation on the points on the auxiliary layer to obtain an auxiliary layer plane coherence graph, and making the color of the points with higher coherence darker, namely depicting strike-slip fractures on the auxiliary layer plane coherence graph; and S3, obtaining a target layer reservoir plane distribution diagram, superposing the auxiliary layer plane coherence diagram and the target layer reservoir plane distribution diagram, and selecting a place which has strike-slip fracture and is a development area as an oil and gas enrichment area. According to the method, the position and the trend of the strike-slip fracture can be clearly displayed on the auxiliary layer plane coherence map through the auxiliary layer coherence technology, after the reservoir plane coherence map is stacked, the oil and gas enrichment area can be more accurately recognized, and then efficient development of the oil reservoir in the later period is guided.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of oil exploration and development, and particularly relates to a method and system for depicting and optimizing an oil and gas enrichment area based on strike-slip fault. BACKGROUND

[0002] Multi-stage tectonic movements are developed in the northern part of the Tarim Basin Tarim Basin North Uplift, and under the influence of compressive stress, the strata have undergone large-scale uplift for multiple times, resulting in that the Lower Paleozoic Ordovician marine carbonate rocks have suffered multiple stages of atmospheric fresh water leaching and weathering denudation, and large-scale weathering crust buried hill and interlayer karst reservoirs are developed. Figure 1 In the early stage, the exploration and development experience of the Rencheng ancient buried hill oil and gas reservoir in the east is referred to, it is considered that the reservoir is large-area oil-bearing, and a large quasi-layered oil reservoir model is established (left), and a large number of development wells are drilled in the favorable reservoir development area according to the seismic reservoir prediction results, but the actual effect is not ideal.

[0003] In recent years, with the continuous progress of seismic processing and interpretation technology, the prediction accuracy of underground geological anomalies has gradually improved, and based on the latest exploration and development results, a new fault-controlled reservoir model is proposed, that is, the reservoir is developed near the fault zone and the oil column height is large (right), and the effectiveness of the method is also confirmed in practice, a large number of wells drilled in the later stage are around the main oil source fault. Figure 1 Further through seismic attribute prediction and efficient well analysis, large-scale conjugate strike-slip faults are developed in the Lower Paleozoic in the area, and a large number of efficient wells are distributed on both sides of the faults, and the wells drilled in the fracture-cave reservoirs far away from the faults often have low production (). Figure 2 The analysis of the reasons is that the primary matrix pores of the carbonate rocks are not developed, and the fractures formed by the fault activity not only can effectively improve the permeability of the reservoir and speed up the dissolution of the karst reservoir, thereby forming effective fracture-cave reservoirs, but also can connect the deep hydrocarbon source rocks and become the main channel for oil and gas migration.

[0004] However, the Lower Paleozoic marine carbonate rocks in the northern part of the Tarim Basin Tarim Basin North Uplift are controlled by sedimentation, and the primary matrix pores are not developed, and the planar distribution of high-quality reservoirs is extremely complex and is often not controlled by a single factor of strike-slip fault. SUMMARY

[0005] In order to solve the problems in the prior art, the application provides a method and system for depicting an optimal oil and gas enrichment area based on strike-slip faults, and the position and trend of the strike-slip faults can be clearly displayed on an auxiliary layer plane coherence map through an auxiliary layer coherence technology, and the oil and gas enrichment area can be more accurately identified after superimposing a reservoir plane distribution map, thereby guiding efficient development of a later reservoir.

[0006] In order to achieve the above object, the application provides the following technical scheme.

[0007] The application further provides a system for depicting an optimal oil and gas enrichment area based on strike-slip faults.

[0008] S1, calibrating drilled wells, and selecting an auxiliary layer according to the calibration result;

[0009] S2, performing coherence calculation on points on the auxiliary layer to obtain an auxiliary layer plane coherence map, and making the color of a point with higher coherence darker, so as to depict the strike-slip faults on the auxiliary layer plane coherence map;

[0010] S3, obtaining a reservoir plane distribution map of a target layer, superimposing the auxiliary layer plane coherence map and the reservoir plane distribution map of the target layer, and selecting a place with strike-slip faults and being a development area as the oil and gas enrichment area.

[0011] Further, in S1, the auxiliary layer for depicting the strike-slip faults is determined by drilling layering or adjacent seismic interpretation induced layers, and the main target layer and the main seismic horizon of the strike-slip fault distribution are preliminarily interpreted.

[0012] Further, in S1, the layer with stable velocity variation, stable stratum thickness and closest to the target layer in the vertical direction is selected as the auxiliary layer.

[0013] Further, in S2, when the coherence calculation is performed, a time window range is first determined in the vertical direction of the auxiliary layer, the coherence of all points in the auxiliary layer plane in the time window range is calculated, the color of a point with higher coherence is made darker, the connection of the dark points is the strike-slip fault line depicted on the auxiliary layer plane coherence map, and thus the auxiliary layer plane coherence map with the strike-slip faults depicted is obtained.

[0014] Further, in S2, 2-3 complete waveforms of the auxiliary layer on and below a seismic profile are selected as the time window range.

[0015] Further, in S3, the reservoir plane distribution map of the target layer is obtained by using the root mean square amplitude attribute.

[0016] Further, in S3, the time window range used for the reservoir plane distribution calculation by using the root mean square amplitude attribute is determined according to the vertical development range of the reservoir.

[0017] The application further provides a system for depicting an optimal oil and gas enrichment area based on strike-slip faults.

[0018] An auxiliary layer determination module is configured to calibrate the drilled well, and select an auxiliary layer according to a calibration result;

[0019] A strike-slip fault description module is configured to calculate the coherence of points on the auxiliary layer, obtain an auxiliary layer plane coherence map, and make the points with higher coherence darker in color, i.e., describe the strike-slip fault on the auxiliary layer plane coherence map;

[0020] An oil and gas enrichment area optimization module is configured to obtain a target layer reservoir plane distribution map, superimpose the auxiliary layer plane coherence map and the target layer reservoir plane distribution map, and select a place with a strike-slip fault and being a development area as an oil and gas enrichment area.

[0021] The application further provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the steps of the method for describing and optimizing an oil and gas enrichment area based on a strike-slip fault when executing the computer program.

[0022] The application further provides a computer readable storage medium, including a computer program, and the processor implements the steps of the method for describing and optimizing an oil and gas enrichment area based on a strike-slip fault when executing the computer program.

[0023] Compared with the prior art, the application has at least the following beneficial effects:

[0024] The application provides a method for describing and optimizing an oil and gas enrichment area based on a strike-slip fault, and since the reservoir is affected by the fracture and karstification, the plane distribution is abnormally complex, the position and strike of the strike-slip fault can be clearly displayed on the auxiliary layer plane coherence map by using coherence calculation, and the oil and gas enrichment area can be more accurately identified after superimposing the reservoir plane distribution map.

[0025] The application extracts the plane coherence by selecting the auxiliary layer closest to the target layer and continuously trackable in the horizontal direction, thereby ensuring the similarity between the described strike-slip fault and the target layer, effectively eliminating the influence of the surface reservoir on the judgment of the oil and gas enrichment area, and making the result more reliable.

[0026] The method comprehensively considers various factors such as geological structure, reservoir development, and oil and gas migration and accumulation, makes the prediction of the oil and gas enrichment area more comprehensive and accurate, can intuitively show the spatial relationship between the fracture and the reservoir through the superimposition of the auxiliary layer plane coherence map and the reservoir plane distribution map, can quickly delineate the oil and gas enrichment area, and improves the efficiency of exploration and development. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1The schematic diagram of reservoir mode under different reservoir recognition, in which the reservoir mode under quasi-layered reservoir recognition (left); and the reservoir mode under fault-controlled reservoir recognition (right);

[0028] Figure 2 The intersection plot of the distance between the drilled wells in the typical fault zone and the main fault;

[0029] Figure 3 The statistical plot of new wells in the typical oilfield in the past three years;

[0030] Figure 4 The example plot of the position of the auxiliary layer and the time window, and the root mean square amplitude time window of the target layer on the typical profile;

[0031] Figure 5 The coherent plane distribution map of the auxiliary layer in the typical oilfield;

[0032] Figure 6 The reservoir plane distribution map of the target layer in the typical oilfield;

[0033] Figure 7 The plane distribution map of the target layer fracture + reservoir in the typical oilfield;

[0034] Figure 8 The schematic diagram of new well deployment on the RP fault zone;

[0035] Figure 9 The schematic diagram of a computer device provided by an embodiment of the present application;

[0036] Figure 10 The block diagram of a chip provided by an embodiment of the present application. DETAILED DESCRIPTION

[0037] To make the purpose, technical scheme and advantages of the present application clearer, the implementation process of the present application is further described in detail below with reference to the drawings. The schematic examples of the present application and the descriptions thereof are used to explain the present application, and do not limit the present application.

[0038] The present application proposes an optimal method for oil and gas enrichment area suitable for efficient development of fractured-vuggy carbonate reservoirs in a complex karst area based on strike-slip fault description. Due to the influence of faults and karstification, the plane distribution of the reservoir is extremely complex. A marker layer closest to the target layer and continuously trackable in the horizontal direction is selected as an auxiliary layer, the coherence of the auxiliary layer is calculated, the similarity between the described fault and the target layer is ensured, and the influence of the surface reservoir is eliminated, so that the plane coherence map of the auxiliary layer is obtained. Based on the strike-slip fault displayed on the plane coherence map of the auxiliary layer, the plane coherence map of the auxiliary layer and the plane distribution map of the reservoir are superimposed to obtain the oil and gas enrichment area. The specific steps are as follows:

[0039] Step 1: Preparation of seismic and geological data

[0040] Understand the regional geological background, analyze the background and development characteristics of strike-slip fault development;

[0041] Step 2: Seismic-geological horizon calibration and main marker horizon interpretation

[0042] Through drilling stratification or adjacent seismic interpretation of the induced layer, the main purpose layer and the main seismic horizon of strike-slip fault distribution are preliminarily interpreted. Through fine calibration of the drilled wells, the results of calibration are used to optimize the closest auxiliary layer to the reservoir as an auxiliary layer, and the structure of the auxiliary layer is interpreted to ensure that the real structure position of the reservoir can be maximized. Figure 4 );

[0043] Among them, the conditions for determining the auxiliary layer are: 1) the velocity changes stably in the vertical direction, that is, there are obvious continuous seismic axes that can be tracked on the seismic profile; 2) the stratum thickness is relatively stable; 3) it meets the above two conditions and is closest to the target layer.

[0044] Step 3: Obtain the auxiliary layer coherence to obtain the auxiliary layer plane coherence map;

[0045] A time window range is determined in the vertical direction of the auxiliary layer obtained in step 2. The time window range generally selects 2-3 complete waveforms above and below the auxiliary layer on the seismic profile, which can retain the discontinuous characteristics of the seismic events caused by the fracture.

[0046] Taking the calculation of the coherence value of a certain point as an example, the seismic records of the adjacent points to be calculated are obtained, generally 5, 7, 9, etc. The base channel is selected for coherence value calculation, and the above process is repeated until the coherence value of each point on the auxiliary layer plane is calculated. The auxiliary layer coherence plane distribution map is obtained Figure 5 ), specifically, the coherence value is represented by the gray value on the auxiliary layer coherence plane distribution map, the higher the coherence, the darker the color, so that the points with high coherence value can be connected into a line to depict the strike-slip fracture. The specific steps of coherence value calculation are as follows:

[0047] Suppose the seismic records of the adjacent points to be calculated are X i (n); i=1, 2, …, M; n=1, 2, …, N, where M is the selected M channels, and N is the number of each channel. In order to calculate the similarity of M channels, it is assumed that there is a standard channel The energy objective function Q can be expressed as:

[0048]

[0049] Taking the derivative of both sides gives

[0050]

[0051] Equation (1) represents the absolute error. After normalization, its ratio to the total error energy is:

[0052]

[0053] Because energy balancing is used between channels during the acquisition process, the total energy value of channel M is generally fixed. Let

[0054] Formula (4) can be used to calculate the correlation coefficient between different channels at a certain point, and thus the coherence value at that point can be obtained.

[0055] Step 4: Obtaining the planar distribution map of the target reservoir layer

[0056] By extracting the root mean square amplitude attribute of the target layer, the planar distribution location of the reservoir is determined, and a planar distribution map of the reservoir is obtained. Figure 6 ).

[0057] Calculation process for obtaining reservoir planar distribution from root mean square amplitude properties:

[0058] First, the vertical development range of the reservoir is determined through interpretation, and a time window is given. Assuming the seismic records for the points to be analyzed within the time window are X(n)n=1,2,…,N, where N is the number of sampling points in each vertical trace, the amplitude value of each point is read as A(n)n=1,2,…,N. The root mean square amplitude attribute at that point is then calculated. By iteratively calculating the root mean square amplitude value of each point on the plane, a plane property distribution map is obtained.

[0059] Step 5: Selection of oil-rich reservoir areas

[0060] Using the auxiliary layer planar coherence map obtained in step 3 ( Figure 5 ), a planar distribution map of the superimposed reservoirs ( Figure 6 ), to obtain the planar distribution map of the target layer fracture + reservoir ( Figure 7 In the plane distribution map of the target layer fracture + reservoir, the plane coherence map of the auxiliary layer is high, and the area where the reservoir is developed is the oil and gas enrichment area. That is, the area where the deep strike-slip fracture is developed and the target layer reservoir is developed is the oil-rich area.

[0061] In summary, the method proposed in this invention for characterizing preferred oil and gas enrichment zones based on strike-slip fractures is simple and easy to implement, and can quickly obtain favorable development zones of oil reservoirs.

[0062] This invention, through auxiliary layer coherence technology, clarifies the distribution range of planar main strike-slip fractures. Based on the study of differential oil and gas enrichment patterns along strike-slip fractures, 20 wells drilled in the past three years along the oil and gas enrichment zones identified by the method of this invention have all been put into production, with an average single-well production capacity of 34 tons / day. The proportion of profitable wells has increased from 14.3% in 2016 to the current 66.7%. Figure 3 The cumulative oil production during this phase reached 345,000 tons, achieving excellent production results.

[0063] Furthermore, such as Figure 8 As shown, based on the method of this invention, the area near the RP fault zone was determined to be an oil and gas enrichment zone. Five new wells were deployed on the RP fault zone, and the specific production results are as follows:

[0064]

[0065] Based on the statistics of production effects of newly completed wells in the RP fault zone above, it can be seen that new wells deployed in the oil and gas enrichment areas identified by the method of this invention can all have good oil and gas production.

[0066] In another embodiment of the present invention, a system for identifying and selecting oil and gas enrichment zones based on strike-slip fractures is provided. This system can be used to implement the above-mentioned method for identifying and selecting oil and gas enrichment zones based on strike-slip fractures. Specifically, the system for identifying and selecting oil and gas enrichment zones based on strike-slip fractures includes an auxiliary layer determination module, a strike-slip fracture characterization module, and an oil and gas enrichment zone selection module. The auxiliary layer determination module is used to calibrate the drilled wells and select auxiliary layers based on the calibration results.

[0067] The strike-slip fracture characterization module is used to perform coherence calculations on points on the auxiliary layer to obtain a plane coherence map of the auxiliary layer. Points with higher coherence are colored darker, thus characterizing the strike-slip fracture on the plane coherence map of the auxiliary layer.

[0068] The oil and gas enrichment zone selection module is used to obtain the planar distribution map of the target reservoir, overlay the planar coherence map of the auxiliary layer and the planar distribution map of the target reservoir, and select the area with strike-slip fractures and which is a development zone as the oil and gas enrichment zone.

[0069] In still another embodiment of the present application, a computer device is provided, which comprises a processor and a memory for storing a computer program comprising program instructions, and the processor is configured to execute the program instructions stored in the computer storage medium. The processor can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc., which are the computing core and control core of the terminal, and are suitable for implementing one or more instructions, and are particularly suitable for loading and executing one or more instructions to implement a corresponding method flow or a corresponding function; the processor in the embodiments of the present application can be used for the operation of a method for depicting an optimal oil and gas enrichment area based on strike-slip faulting, comprising:

[0070] Step 1: preparation of seismic and geological data

[0071] Understand the regional geological background, analyze the background and development characteristics of strike-slip fault development;

[0072] Step 2: seismic-geological horizon calibration and main marker horizon interpretation

[0073] Through drilling stratification or adjacent seismic interpretation of the layer, the main purpose layer and the main seismic horizon of strike-slip fault distribution are preliminarily interpreted. Through fine calibration of the drilled well, the results of calibration are used to optimize the nearest and regionally distributed marker layer to the reservoir as an auxiliary layer, and the auxiliary layer is structurally interpreted to ensure that the real structural position of the reservoir can be maximally reflected Figure 4 );

[0074] Step 3: obtaining of auxiliary layer coherence to obtain auxiliary layer plane coherence map

[0075] A time window range is determined on the longitudinal direction of the auxiliary layer obtained in step 2, and the time window range generally selects 2-3 complete waveforms of the auxiliary layer on the seismic profile, which can retain the discontinuous characteristics of the seismic events due to the occurrence of the fault.

[0076] Taking the calculation of the coherence value of a certain point as an example, the seismic records of the adjacent multiple channels of the to-be-solved point are obtained, and generally the base channels of 5, 7, 9, etc. are selected for coherence value calculation, and the above process is repeated to update the to-be-solved point until the coherence value of each point on the auxiliary layer plane is calculated, and the auxiliary layer coherence plane distribution map is obtainedFigure 5 Specifically, the coherence value is represented by grayscale values ​​on the coherence plane distribution map of the auxiliary layer. The higher the coherence, the darker the color. Thus, points with high coherence values ​​can be connected to form a line to depict the strike-slip fracture.

[0077] Step 4: Obtaining the planar distribution map of the target reservoir layer

[0078] By extracting the root mean square amplitude attribute of the target layer, the planar distribution location of the reservoir is determined, and a planar distribution map of the reservoir is obtained. Figure 6 ).

[0079] Step 5: Selection of oil-rich reservoir areas

[0080] Using the auxiliary layer planar coherence map obtained in step 3 ( Figure 5 ), a planar distribution map of the superimposed reservoirs ( Figure 6 ), to obtain the planar distribution map of the target layer fracture + reservoir ( Figure 7 In the plane distribution map of the target layer fracture + reservoir, the plane coherence map of the auxiliary layer is high, and the area where the reservoir is developed is the oil and gas enrichment area. That is, the area where the deep strike-slip fracture is developed and the target layer reservoir is developed is the oil-rich area.

[0081] Figure 9 This is a schematic diagram of a computer device provided according to an embodiment of the present invention.

[0082] Please see Figure 9 The computer device 60 in this embodiment includes a processor 61, a memory 62, and a computer program 63 stored in the memory 62 and executable on the processor 61. When executed by the processor 61, the computer program 63 implements a method for characterizing preferred oil and gas enrichment zones based on strike-slip fractures, as described in detail here to avoid repetition. Alternatively, when executed by the processor 61, the computer program 63 implements the functions of each model / unit in the system for characterizing preferred oil and gas enrichment zones based on strike-slip fractures, as described in detail here to avoid repetition.

[0083] Computer device 60 can be a desktop computer, laptop, handheld computer, cloud server, or other computing device. Computer device 60 may include, but is not limited to, a processor 61 and a memory 62. Those skilled in the art will understand that... Figure 9 This is merely an example of computer device 60 and does not constitute a limitation on computer device 60. It may include more or fewer components than shown, or combine certain components, or different components. For example, computer device may also include input / output devices, network access devices, buses, etc.

[0084] The processor 61 can be a central processing unit (CPU), and can also be other general-purpose processors, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0085] The memory 62 can be an internal storage unit of the computer device 60, such as a hard disk or a memory of the computer device 60. The memory 62 can also be an external storage device of the computer device 60, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the computer device 60.

[0086] Further, the memory 62 can include both the internal storage unit and the external storage device of the computer device 60. The memory 62 is used to store computer programs and other programs and data required by the computer device. The memory 62 can also be used to temporarily store data that has been output or will be output.

[0087] Figure 10 A block diagram of a chip according to an embodiment of the present application is provided.

[0088] Referring to Figure 10 , the computer device is a chip, and the chip 600 of this embodiment includes a processor 622, the number of which can be one or more, and a memory 632 for storing computer programs executable by the processor 622. The computer programs stored in the memory 632 can include one or more than one module each corresponding to a set of instructions. In addition, the processor 622 can be configured to execute the computer programs to perform the method for delineating a preferred hydrocarbon enrichment zone based on strike-slip faulting described above.

[0089] In addition, the chip 600 can also include a power supply component 626 which can be configured to perform power management of the chip 600, and a communication component 650 which can be configured to implement communication of the chip 600, such as wired or wireless communication. In addition, the chip 600 can also include an input / output interface 658. The chip 600 can operate based on an operating system stored in the memory 632.

[0090] In still another embodiment of the present application, the present application further provides a storage medium, specifically a computer readable storage medium, which is a memory device in a computer device, for storing programs and data. It can be understood that the computer readable storage medium herein can include an internal storage medium in the computer device, and of course can include an extended storage medium supported by the computer device. The computer readable storage medium provides a storage space, which stores an operating system of the terminal. Moreover, one or more instructions adapted to be loaded and executed by the processor are stored in the storage space, and the instructions can be one or more computer programs. It should be noted that the computer readable storage medium herein can be a high-speed RAM memory, or a non-volatile memory such as at least one disk memory.

[0091] The one or more instructions stored in the computer readable storage medium can be loaded and executed by the processor to implement the corresponding steps of the method for delineating a preferred oil and gas enrichment zone based on strike-slip fracture in the above embodiments; the one or more instructions stored in the computer readable storage medium are loaded and executed by the processor to perform the following steps:

[0092] S1 calibrating the drilled well, and selecting an auxiliary layer according to the calibration result;

[0093] S2 calculating the coherence of points on the auxiliary layer to obtain an auxiliary layer plane coherence map, and making the color of points with higher coherence darker, i.e. delineating the strike-slip fracture on the auxiliary layer plane coherence map;

[0094] S3 obtaining a target layer reservoir plane distribution map, superimposing the auxiliary layer plane coherence map and the target layer reservoir plane distribution map, and selecting a place with strike-slip fracture and being a development zone as an oil and gas enrichment zone.

[0095] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the above-mentioned division of each functional unit and module is exemplified, and in actual application, the above-mentioned functions can be completed by different functional units and modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be realized in the form of hardware or software. In addition, the specific names of each functional unit and module are only for the convenience of mutual distinction, and do not limit the protection scope of the present application. The specific working process of the units and modules in the above system can refer to the corresponding process in the foregoing method embodiments, which will not be described here.

[0096] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described or recorded in detail in a certain embodiment can be referred to the related description of other embodiments.

[0097] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed in the present application can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are executed in hardware or software depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0098] In the embodiments provided by the present application, it should be understood that the disclosed apparatus / terminal and method can be implemented by other ways. For example, the above-mentioned apparatus / terminal embodiments are only schematic, and the division of the modules or units is only a logical function division, and there can be another division way in actual implementation, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or other forms.

[0099] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0100] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

[0101] The integrated module / unit, if implemented in the form of a software functional unit and sold or used as an independent product, can be stored in a computer readable storage medium. Based on such understanding, all or part of the processes in the above-mentioned embodiment methods can be completed by a computer program instructing related hardware, and the computer program can be stored in a computer readable storage medium. The computer program can implement the steps of each method embodiment when executed by a processor. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or some intermediate forms. The computer readable medium can include any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal, and software distribution medium, etc. It should be noted that the computer readable medium can include or exclude contents according to the requirements of legislation and patent practice in the jurisdiction, for example, in some jurisdictions, according to legislation and patent practice, the computer readable medium does not include electrical carrier signals and telecommunication signals.

[0102] The present application is described with reference to flowcharts and / or block diagrams according to the methods, devices, and computer program products of embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and the combination of flows and / or blocks in the flowcharts and / or block diagrams can be implemented by computer program instructions. These computer program instructions can be provided to a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to produce a machine, so that the instructions executed by the computer or other programmable data processing devices produce a device that implements the functions specified in the flowcharts and / or block diagrams. Figure 1 The functions specified in one flow or multiple flows and / or blocks Figure 1 The functions specified in one flow or multiple flows and / or blocks

[0103] These computer program instructions can also be stored in a computer readable storage medium that can direct the computer or other programmable data processing devices to work in a specific manner, so that the instructions stored in the computer readable storage medium produce a manufactured product including instruction devices that implement the functions specified in the flowcharts and / or block diagrams. Figure 1one or more processes and / or blocks Figure 1 the function specified in the one or more blocks.

[0104] These computer program instructions can also be loaded into computer or other programmable data processing devices, so that a series of operational steps are performed on the computer or other programmable data processing devices to generate a computer-implemented process, so that the instructions executed on the computer or other programmable data processing devices provide a process for implementing the flow Figure 1 one or more processes and / or blocks Figure 1 Figure 1 the function specified in the one or more blocks.

[0105] The above is only to illustrate the technical idea of the present application, and cannot limit the protection scope of the present application. Any modification made according to the technical idea of the present application on the basis of the technical scheme falls within the protection scope of the claims of the present application.

Claims

1. A method for delineating, preferably oil and gas, rich zones based on strike-slip faulting, characterized in that, The specific steps are as follows: S1 calibrates the drilled well, and selects an auxiliary layer according to the calibration result; S2 calculates the coherence of points on the auxiliary layer to obtain an auxiliary layer plane coherence map, and makes the color of points with higher coherence darker, so as to delineate the strike-slip fault on the auxiliary layer plane coherence map; S3 obtains a target layer reservoir plane distribution map, superimposes the auxiliary layer plane coherence map and the target layer reservoir plane distribution map, and selects a place with strike-slip fault and development zone as an oil and gas enrichment zone.

2. The method for delineating a preferred hydrocarbon enrichment zone based on strike-slip faulting according to claim 1, characterized in that, In S1, the main target layer and the seismic horizon of the main strike-slip fault distribution are preliminarily interpreted through well layering or adjacent seismic interpretation, so as to determine the auxiliary layer for delineating the strike-slip fault.

3. A method for delineating a preferred hydrocarbon enrichment zone based on strike-slip faulting according to claim 2, characterized in that, In S1, the layer closest to the target layer with stable velocity change and stable stratum thickness in the vertical direction is selected as the auxiliary layer.

4. The method for delineating a preferred hydrocarbon enrichment zone based on strike-slip faulting according to claim 1, characterized in that, In S2, when the coherence calculation is performed, a time window range is first determined in the vertical direction of the auxiliary layer, the coherence of all points in the auxiliary layer plane in the time window range is calculated, the color of points with higher coherence is made darker, and then the strike-slip fault line is connected on the auxiliary layer plane coherence map, so as to obtain the auxiliary layer plane coherence map with the strike-slip fault.

5. A method for delineating a preferred hydrocarbon enrichment zone based on strike-slip faulting according to claim 4, characterized in that, In S2, the time window range is selected as 2-3 complete waveforms on the auxiliary layer on the seismic profile.

6. The method for delineating a preferred hydrocarbon enrichment zone based on strike-slip faulting according to claim 1, wherein, In S3, the reservoir plane distribution map of the target layer is obtained by using the root mean square amplitude attribute.

7. A method for delineating a preferred hydrocarbon enrichment zone based on strike-slip faulting according to claim 6, characterized in that, In S3, the time window range used for reservoir plane distribution calculation by using the root mean square amplitude attribute is determined according to the vertical development range of the reservoir.

8. A system for delineating, preferably, hydrocarbon rich zones based on strike-slip faulting, the system comprising: It comprises: An auxiliary layer determination module for calibrating the drilled well and selecting an auxiliary layer according to the calibration result; A strike-slip fault delineation module for calculating the coherence of points on the auxiliary layer to obtain an auxiliary layer plane coherence map, and making the color of points with higher coherence darker, that is, delineating the strike-slip fault on the auxiliary layer plane coherence map; An oil and gas enrichment zone optimization module for obtaining a target layer reservoir plane distribution map, superimposing the auxiliary layer plane coherence map and the target layer reservoir plane distribution map, and selecting a place with strike-slip fault and development zone as an oil and gas enrichment zone.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, The processor executes the computer program to realize the steps of the method for preferably delineating an oil and gas enrichment zone based on a strike-slip fault according to any one of claims 1-7.

10. A computer readable storage medium comprising a computer program, characterized in that, The computer program is executed by the processor to realize the steps of the method for preferably delineating an oil and gas enrichment zone based on a strike-slip fault according to any one of claims 1-7.

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