Method, device and equipment for classifying and evaluating evolution stages of suture lines in rock

Abstract

The invention provides a method, device and equipment for classifying and evaluating the evolution stage of a suture line in rock, and belongs to the field of structural geology, and the method comprises the following steps: determining the amplitude change rate of the suture line included in a target rock sample; determining the porosity change rate of the target rock sample; according to the amplitude change rate and the porosity change rate, determining the overall maturity grade of the suture line in the target rock sample, wherein the overall maturity grade is used for evaluating the evolution stage of the suture line in the target rock sample. The authority of evaluation of the suture line evolution stage can be enhanced, and the evaluation accuracy and the application universality can be improved.

Description

Technical Field

[0001] The present application belongs to the field of structural geology, and specifically relates to a method, device and equipment for classifying and evaluating the evolutionary stages of sutures in rocks. Background Art

[0002] As a type of pressure solution structure, sutures are mainly formed in carbonate rocks. Their morphology, scale and geometry are crucial to understanding the diagenesis and geological history of rocks. They not only record the pressure solution of rocks in the diagenetic-epigenetic stage, but also reflect the selective dissolution process of rock components under pressure. Understanding the evolutionary stage of sutures helps to evaluate the reservoir characteristics of rocks, especially in the field of oil and gas exploration. Sutures, as potential channels for oil and gas migration, have guiding significance for reservoir evaluation and development. Therefore, the study of the evolutionary stage of sutures not only enhances our understanding of geological structures and rock properties, but also has practical application value for the exploration and development of energy resources. However, the current evaluation of the evolutionary stage of sutures mostly relies on qualitative descriptions and observations, and lacks quantitative evaluation methods and standards. Summary of the invention

[0003] The present application provides a method, device and equipment for classifying and evaluating the evolutionary stages of sutures in rocks, so as to enhance the authority of the evaluation of the evolutionary stages of sutures, and improve the accuracy and wide applicability of the evaluation.

[0004] The present application provides a method for classifying and evaluating the evolutionary stages of sutures in rocks, including: determining a rate of change of amplitude of a stylolite included in a target rock sample; determining a porosity change rate of the target rock sample; An overall maturity grade of the stylolite in the target rock sample is determined according to the amplitude change rate and the porosity change rate, and the overall maturity grade is used to evaluate the evolution stage of the stylolite in the target rock sample.

[0005] According to the method for classifying and evaluating the evolution stage of sutures in rocks provided in the present application, the overall maturity grade of the sutures in the target rock sample is determined based on the amplitude change rate and the porosity change rate, including: determining the relative importance of the amplitude change rate and the porosity change rate; determining a first weight coefficient corresponding to the amplitude change rate and a second weight coefficient corresponding to the porosity change rate based on the relative importance, wherein the higher the relative importance, the larger the corresponding weight coefficient; and determining the overall maturity grade of the sutures in the target rock sample based on the first weight coefficient, the second weight coefficient, the amplitude change rate, and the porosity change rate.

[0006] According to the method for classifying and evaluating the evolution stage of sutures in rocks provided in the present application, determining the amplitude change rate of the sutures included in the target rock sample includes: obtaining a first amplitude at the center of the suture and a second amplitude at the tip of the suture; and determining the amplitude change rate of the suture based on the first amplitude and the second amplitude.

[0007] According to the method for classifying and evaluating the evolution stage of sutures in rocks provided in the present application, determining the amplitude change rate of the suture based on the first amplitude and the second amplitude includes: obtaining the amplitude difference between the first amplitude and the second amplitude; and determining the ratio of the amplitude difference to the second amplitude as the amplitude change rate of the suture.

[0008] According to the method for classifying and evaluating the evolution stage of sutures in rocks provided in the present application, determining the porosity change rate of the target rock sample includes: obtaining a first porosity of a suture area and a second porosity of a matrix area included in the target rock sample; and determining the porosity change rate based on the first porosity and the second porosity.

[0009] According to the method for classifying and evaluating the evolution stage of sutures in rocks provided in the present application, determining the porosity change rate based on the first porosity and the second porosity includes: obtaining the porosity difference between the first porosity and the second porosity; and determining the ratio of the porosity difference to the second porosity as the porosity change rate.

[0010] According to the method for classifying and evaluating the evolution stage of sutures in rocks provided in the present application, the method also includes: determining a length value of a target suture area from the center of a target suture, the target suture area belongs to the target suture, and the target suture is any one of a plurality of sutures included in the target rock sample; determining a regional maturity grade of the target suture area according to the length value.

[0011] The present application also provides a device for classifying and evaluating the evolutionary stages of sutures in rocks, comprising: a first determination unit, configured to determine an amplitude change rate of a suture included in a target rock sample; A second determination unit, configured to determine a porosity change rate of the target rock sample; A third determination unit is used to determine an overall maturity grade of the suture in the target rock sample according to the amplitude change rate and the porosity change rate, wherein the overall maturity grade is used to evaluate an evolution stage of the suture in the target rock sample.

[0012] The present application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the method for classifying and evaluating the evolutionary stages of sutures in rocks as described above is implemented.

[0013] The present application also provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the method for classifying and evaluating the evolutionary stages of sutures in rocks as described above is implemented.

[0014] The present application also provides a computer program product, including a computer program, which, when executed by a processor, implements any of the above-mentioned methods for classifying and evaluating the evolutionary stages of sutures in rocks.

[0015] The method, device and apparatus for classifying and evaluating the evolution stage of sutures in rocks provided in the present application comprehensively determine the overall maturity level of the sutures in the target rock sample by the amplitude change rate and porosity change rate of the sutures included in the target rock sample, making the evaluation of the evolution stage of sutures in rocks more authoritative, and improving the evaluation accuracy and wide applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a flow chart of a method for classifying and evaluating the evolutionary stages of sutures in rocks provided in this application.

[0018] Figure 2 It is a schematic diagram of the structure of a device for classifying and evaluating the evolutionary stages of sutures in rocks provided by the present application; Figure 3 It is a schematic diagram of the structure of the electronic device provided by this application. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are 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 are within the scope of protection of the present invention.

[0020] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof 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 limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices.

[0021] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0022] Currently, the evaluation of suture evolution stages mostly relies on qualitative description and observation, and lacks quantitative evaluation methods and standards.

[0023] In response to the above problems, the embodiments of the present application provide a method, device and equipment for classifying and evaluating the evolution stages of sutures in rocks. The embodiments of the present application are described in detail below in conjunction with the accompanying drawings.

[0024] See also Figure 1 , Figure 1 The present invention provides a flow chart of a method for classifying and evaluating the evolutionary stages of sutures in rocks. The method for classifying and evaluating the evolutionary stages of sutures in rocks includes the following steps.

[0025] S101, determining the amplitude change rate of a suture included in a target rock sample.

[0026] The target rock sample may be obtained by first obtaining a rock sample from a surface outcrop, and then preparing a thin section based on the rock sample to obtain the target rock sample. It should be noted that a target rock sample may include multiple sutures. The amplitude change rate is determined based on the amplitudes of the multiple sutures.

[0027] S102, determining the porosity change rate of the target rock sample.

[0028] The porosity change rate may be determined based on the porosity of the suture area and the porosity of the matrix area in the target rock sample.

[0029] S103, determining an overall maturity grade of the stylolite in the target rock sample according to the amplitude change rate and the porosity change rate, wherein the overall maturity grade is used to evaluate an evolution stage of the stylolite in the target rock sample.

[0030] Among them, the maturity index M can be calculated based on the amplitude change rate and the porosity change rate, and then the overall maturity level can be determined based on the maturity index. The maturity index can be divided into three different levels, low maturity (M<0.5), medium maturity (0.5≤M<1.0) and high maturity (M≥1.0).

[0031] It can be seen that in the embodiment of the present application, the overall maturity level of the sutures in the target rock sample is determined by comprehensively determining the amplitude change rate and porosity change rate of the sutures in the target rock sample, making the evaluation of the evolution stage of the sutures in the rock more authoritative, and improving the evaluation accuracy and wide applicability.

[0032] In a possible embodiment, determining the overall maturity grade of the suture in the target rock sample based on the amplitude change rate and the porosity change rate includes: determining the relative importance of the amplitude change rate and the porosity change rate; determining a first weight coefficient corresponding to the amplitude change rate and a second weight coefficient corresponding to the porosity change rate based on the relative importance, wherein a higher relative importance indicates a larger corresponding weight coefficient; and determining the overall maturity grade of the suture in the target rock sample based on the first weight coefficient, the second weight coefficient, the amplitude change rate, and the porosity change rate.

[0033] The sum of the first weight coefficient and the second weight coefficient may be 1. The weight coefficient may be determined by experimental data or geological background. That is, the amplitude change rate and the porosity change rate may be determined by experimental data or geological background, and the weight coefficient of the more important indicator may be set higher. For example, if the amplitude change rate and the porosity change rate are equally important in maturity evaluation, the first weight coefficient and the second weight coefficient may be set to 0.5.

[0034] It can be seen that in this embodiment, the corresponding weight coefficients are determined based on the relative importance of the amplitude change rate and the porosity change rate, respectively, so that the overall maturity of the suture in the target rock sample can be evaluated more accurately.

[0035] In a possible embodiment, determining the amplitude change rate of a suture included in the target rock sample includes: acquiring a first amplitude at the center of the suture and a second amplitude at the tip of the suture; and determining the amplitude change rate of the suture based on the first amplitude and the second amplitude.

[0036] Among them, when obtaining the first amplitude of the center point, the image information of the rock sample can be obtained first, and then the image can be preprocessed to locate the position of the suture line, and then the image segmentation or feature extraction algorithm (such as Hough transform, corner detection, etc.) can be used to identify the midpoint of the suture line. Finally, the midpoint of the suture line is tracked to obtain the position information that changes with time, and the vibration displacement of the point is obtained by tracking the displacement change of the center point of the suture line in each frame of the image. The maximum displacement can be used as the first amplitude of the midpoint of the suture line in the target rock, or the average value of the vibration displacement can be used as the first amplitude. The method of obtaining the second amplitude of the tip is similar, and it will not be repeated here.

[0037] In a possible embodiment, determining the amplitude change rate of the suture line according to the first amplitude and the second amplitude includes: obtaining the amplitude difference between the first amplitude and the second amplitude; and determining the ratio of the amplitude difference to the second amplitude as the amplitude change rate of the suture line.

[0038] It can be seen that in this embodiment, the amplitude change rate is determined based on the amplitudes of the center and the tip of the suture thread, which can simply and quickly obtain the amplitude change rate and improve the evaluation efficiency.

[0039] In a possible embodiment, determining the porosity change rate of the target rock sample includes: acquiring a first porosity of a suture area and a second porosity of a matrix area included in the target rock sample; and determining the porosity change rate based on the first porosity and the second porosity.

[0040] Among them, the first porosity and the second porosity of the target rock sample are obtained by using techniques such as mercury injection, computed tomography (CT) or nuclear magnetic resonance (NMR). Taking the use of CT to obtain porosity as an example, the CT image is first obtained, and then the CT image is preprocessed, including noise removal: removing the noise that may be generated during the scanning process to obtain a clearer image. Image enhancement: enhancing the image contrast to make the solid part and the pore part easier to distinguish. Segmentation processing: segmenting the pore part (low-density area) and the solid part (high-density area) in the image, etc. Then the preprocessed image is binarized, and then each pixel (or voxel) is marked, for example, black pixels are set to 0 for the pore area, and white pixels are set to 1 for the solid area. Finally, the number of pixels in the pore area is counted, and the volume ratio occupied by the pore area is calculated. For example, if the resolution of the pixel is known, the volume corresponding to each pixel can be calculated. The ratio of the total volume of the pores included in the suture area to the overall volume of the suture area is the first porosity. The calculation of the second porosity is as above and will not be repeated.

[0041] In a possible embodiment, determining the porosity change rate based on the first porosity and the second porosity includes: obtaining a porosity difference between the first porosity and the second porosity; and determining a ratio of the porosity difference to the second porosity as the porosity change rate.

[0042] It can be seen that in this embodiment, the porosity change rate is determined based on the porosity of the sutured area and the matrix porosity, which can simply and quickly obtain the porosity change rate and improve the evaluation efficiency.

[0043] In a possible embodiment, the method further includes: determining a length value of a target suture area from a center of a target suture, the target suture area belonging to the target suture, and the target suture is any one of a plurality of sutures included in the target rock sample; and determining a regional maturity grade of the target suture area according to the length value.

[0044] In addition to calculating the maturity level of the sutures in the target rock sample as a whole, the maturity of each suture area on each suture can also be evaluated separately. The closer the target suture area is to the center, the higher the maturity level of the target suture area can be considered.

[0045] It can be seen that in this embodiment, the maturity level of the suture area is determined based on the distance between the suture area and the suture center, which can enhance the comprehensiveness of the evaluation of the suture evolution stage.

[0046] The following is a description of a device for classifying and evaluating the evolutionary stages of sutures in rocks provided in the present application. The device for classifying and evaluating the evolutionary stages of sutures in rocks described below corresponds to the method for classifying and evaluating the evolutionary stages of sutures in rocks described above.

[0047] See also Figure 2 , Figure 2 It is a structural schematic diagram of a device for classifying and evaluating the evolutionary stage of sutures in rocks provided by the present application. The device 200 for classifying and evaluating the evolutionary stage of sutures in rocks comprises: a first determination unit 201, used to determine the amplitude change rate of the sutures included in the target rock sample; a second determination unit 202, used to determine the porosity change rate of the target rock sample; a third determination unit 203, used to determine the overall maturity grade of the sutures in the target rock sample according to the amplitude change rate and the porosity change rate, and the overall maturity grade is used to evaluate the evolutionary stage of the sutures in the target rock sample.

[0048] In a possible embodiment, in terms of determining the overall maturity grade of the suture in the target rock sample based on the amplitude change rate and the porosity change rate, the third determination unit 203 is specifically used to: determine the relative importance of the amplitude change rate and the porosity change rate; determine a first weight coefficient corresponding to the amplitude change rate and a second weight coefficient corresponding to the porosity change rate based on the relative importance, wherein a higher relative importance indicates a larger corresponding weight coefficient; and determine the overall maturity grade of the suture in the target rock sample based on the first weight coefficient, the second weight coefficient, the amplitude change rate, and the porosity change rate.

[0049] In a possible embodiment, in terms of determining the amplitude change rate of the suture included in the target rock sample, the first determination unit 201 is specifically used to: obtain a first amplitude at the center of the suture and a second amplitude at the tip of the suture; and determine the amplitude change rate of the suture based on the first amplitude and the second amplitude.

[0050] In a possible embodiment, in determining the amplitude change rate of the suture line according to the first amplitude and the second amplitude, the first determination unit 201 is specifically used to: obtain the amplitude difference between the first amplitude and the second amplitude; and determine that the ratio of the amplitude difference to the second amplitude is the amplitude change rate of the suture line.

[0051] In a possible embodiment, in terms of determining the porosity change rate of the target rock sample, the second determination unit 202 is specifically used to: obtain a first porosity of a suture area and a second porosity of a matrix area included in the target rock sample; and determine the porosity change rate based on the first porosity and the second porosity.

[0052] In a possible embodiment, in determining the porosity change rate based on the first porosity and the second porosity, the second determination unit 202 is specifically used to: obtain the porosity difference between the first porosity and the second porosity; and determine the ratio of the porosity difference to the second porosity as the porosity change rate.

[0053] In a possible embodiment, the device 200 for classifying and evaluating the evolution stage of sutures in rocks also includes a fourth determination unit, and the fourth determination unit is specifically used to: determine a length value of a target suture area from a center of a target suture, wherein the target suture area belongs to the target suture, and the target suture is any one of a plurality of sutures included in the target rock sample; and determine a regional maturity grade of the target suture area according to the length value.

[0054] See also Figure 3 , Figure 3 Schematic diagram of the structure of the electronic device provided by this application. Figure 3 As shown, the electronic device may include: a processor 310, a communication interface 320, a memory 330 and a communication bus 340, wherein the processor 310, the communication interface 320 and the memory 330 communicate with each other through the communication bus 340. The processor 310 may call the logic instructions in the memory 330 to execute a method for classifying and evaluating the evolution stage of sutures in rocks, the method comprising: determining the amplitude change rate of sutures included in a target rock sample; determining the porosity change rate of the target rock sample; determining the overall maturity grade of the sutures in the target rock sample according to the amplitude change rate and the porosity change rate, the overall maturity grade being used to evaluate the evolution stage of the sutures in the target rock sample.

[0055] In addition, the logic instructions in the above-mentioned memory 330 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0056] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to execute the method for classifying and evaluating the evolution stage of sutures in rocks provided by the above-mentioned methods, the method comprising: determining the amplitude change rate of the sutures included in the target rock sample; determining the porosity change rate of the target rock sample; determining the overall maturity grade of the sutures in the target rock sample based on the amplitude change rate and the porosity change rate, the overall maturity grade being used to evaluate the evolution stage of the sutures in the target rock sample.

[0057] On the other hand, the present application also provides a computer program product, including a computer program, which, when executed by a processor, implements any of the above-mentioned methods for classifying and evaluating the evolution stage of sutures in rocks, the method including: determining the amplitude change rate of the sutures included in the target rock sample; determining the porosity change rate of the target rock sample; determining the overall maturity grade of the sutures in the target rock sample based on the amplitude change rate and the porosity change rate, and the overall maturity grade is used to evaluate the evolution stage of the sutures in the target rock sample.

[0058] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0059] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for classifying and evaluating the evolutionary stages of sutures in rocks, characterized in that: include: determining a rate of change of amplitude of a stylolite included in a target rock sample; determining a porosity change rate of the target rock sample; An overall maturity grade of the stylolite in the target rock sample is determined according to the amplitude change rate and the porosity change rate, and the overall maturity grade is used to evaluate the evolution stage of the stylolite in the target rock sample.

2. The method according to claim 1, characterized in that The step of determining the overall maturity level of the stylolite in the target rock sample according to the amplitude change rate and the porosity change rate comprises: Determining the relative importance of the amplitude change rate and the porosity change rate; Determine a first weight coefficient corresponding to the amplitude change rate and a second weight coefficient corresponding to the porosity change rate according to the relative importance, wherein a higher relative importance corresponds to a larger corresponding weight coefficient; An overall maturity grade of a stylolite in the target rock sample is determined based on the first weight coefficient, the second weight coefficient, the amplitude change rate, and the porosity change rate.

3. The method according to claim 1, characterized in that The step of determining the amplitude change rate of a stylolite included in the target rock sample comprises: acquiring a first amplitude at a center of the suture and a second amplitude at a tip of the suture; An amplitude change rate of the suture line is determined based on the first amplitude and the second amplitude.

4. The method according to claim 3, characterized in that The step of determining the amplitude change rate of the suture line according to the first amplitude and the second amplitude comprises: Obtaining an amplitude difference between the first amplitude and the second amplitude; The ratio of the amplitude difference to the second amplitude is determined as the amplitude change rate of the suture line.

5. The method according to claim 1, characterized in that Determining the porosity change rate of the target rock sample includes: Acquire a first porosity of a suture region and a second porosity of a matrix region included in the target rock sample; The porosity change rate is determined based on the first porosity and the second porosity.

6. The method according to claim 5, characterized in that The determining the porosity change rate according to the first porosity and the second porosity includes: Obtaining a porosity difference between the first porosity and the second porosity; The ratio of the porosity difference to the second porosity is determined as the porosity change rate.

7. The method according to claim 1, characterized in that The method further comprises: Determine a length value of a target stylus region from a center of a target stylus, wherein the target stylus region belongs to the target stylus, and the target stylus is any one of a plurality of stylus included in the target rock sample; A regional maturity level of the target suture region is determined based on the length value.

8. A device for classifying and evaluating the evolutionary stages of sutures in rocks, characterized in that: include: a first determining unit, configured to determine an amplitude change rate of a suture included in a target rock sample; A second determination unit, configured to determine a porosity change rate of the target rock sample; A third determination unit is used to determine an overall maturity grade of the suture in the target rock sample according to the amplitude change rate and the porosity change rate, wherein the overall maturity grade is used to evaluate an evolution stage of the suture in the target rock sample.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that: When the processor executes the computer program, the method for classifying and evaluating the evolutionary stages of sutures in rocks as claimed in any one of claims 1 to 7 is implemented.

10. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method for classifying and evaluating the evolutionary stages of sutures in rocks as claimed in any one of claims 1 to 7 is implemented.

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