An experimental analysis system for oil and gas reservoir rock fracturability

Abstract

The present application belongs to the technical field of oil and gas exploration and development, and discloses an oil and gas reservoir rock fracturing property experimental analysis system, which comprises a data acquisition module, a data preprocessing module, a central control module, a rock attribute data acquisition module, a data analysis module, an index screening module, an index data extraction module, an analysis module, a storage module and a display module. The present application analyzes the rock fracturing property of the oil and gas reservoir by analyzing the geological characteristics and rock attribute characteristics of the oil and gas reservoir, can ensure that the evaluation model constructed can accurately analyze the fracturing property, can truly reflect the difficulty of the fracturing property, has a wide application range and can be applied to different oil and gas reservoirs. Meanwhile, the present application does not require too much data, the analysis result is accurate, and the cost is low.

Description

Technical Field

[0001] This invention belongs to the field of oil and gas exploration and development technology, and in particular relates to an experimental analysis system for the fracturing properties of oil and gas reservoir rocks. Background Technology

[0002] Currently, with the deepening of exploration and development, unconventional oil and gas reservoirs such as shale oil and gas, tight oil and gas, and coalbed methane are gradually becoming the main battleground for oil and gas exploration and development. These unconventional oil and gas reservoirs have low natural production capacity and all require artificial fracturing to achieve economical production. Existing technologies commonly use the brittleness index to characterize fracturability, but the correlation between the two is not very good, failing to accurately reflect the ease or difficulty of reservoir fracturing. Furthermore, existing methods for analyzing rock fracturability largely rely on laboratory experiments, which are not only costly but also result in limited experimental data and inaccurate analytical results, failing to comprehensively and accurately reflect the fracturability of oil and gas reservoir rocks.

[0003] Based on the above analysis, the problems and defects of the existing technology are as follows: the existing technology, which uses the brittleness index fracturing property, cannot truly reflect the ease or difficulty of reservoir fracturing; the existing technology is not only costly, but also has limited experimental data and inaccurate analysis results, and cannot comprehensively and truly reflect the fracturing property of oil and gas reservoir rocks. Summary of the Invention

[0004] To address the problems existing in the prior art, this invention provides an experimental analysis system for the fracturing capability of oil and gas reservoir rocks.

[0005] This invention is implemented as follows: an experimental analysis system for the fracturing capability of oil and gas reservoir rocks, the system comprising:

[0006] The rock property data acquisition module is connected to the central control module and is used to determine the rock property data based on the preprocessed relevant data and the seismic inversion method.

[0007] The data analysis module, connected to the central control module, is used to analyze and determine the characteristics of oil and gas reservoirs based on preprocessed oil and gas reservoir-related data and rock property data.

[0008] The index screening module, connected to the central control module, is used to screen indices for fracturing analysis of oil and gas reservoir rocks based on the characteristics of the identified oil and gas reservoirs.

[0009] The index data extraction module is connected to the central control module and is used to extract relevant index data of the oil and gas reservoir rocks to be analyzed based on the index extraction of the fracturability analysis of the screened oil and gas reservoir rocks.

[0010] The analysis module, connected to the central control module, is used to perform fracturing analysis of oil and gas reservoir rocks based on the extracted relevant index data of oil and gas reservoir rocks, and to obtain the analysis results.

[0011] Furthermore, the oil and gas reservoir rock fracturing test analysis system also includes:

[0012] The data acquisition module is connected to the central control module and is used to acquire logging data, geological data and other relevant data of oil and gas reservoirs.

[0013] The data preprocessing module, connected to the central control module, is used to preprocess the acquired well logging data, geological data, or other data from oil and gas reservoirs.

[0014] The central control module is connected to the data acquisition module, data preprocessing module, rock property data acquisition module, data analysis module, index screening module, index data extraction module, analysis module, storage module, and display module. It is used to control the normal operation of each module using a microcontroller, controller, and microprocessor.

[0015] The storage module, connected to the central control module, is used to store the relevant data obtained from acquisition, preprocessing, and analysis.

[0016] The display module, connected to the central control module, is used to display rock property data, fracturing indexes, and fracturing analysis results of oil and gas reservoir rocks.

[0017] Furthermore, the rock property data acquisition module determines the rock property data based on preprocessed relevant data and seismic inversion methods, including:

[0018] First, obtain the pre-processed logging data, geological data, or other data of the oil and gas reservoir, analyze the pre-processed logging data, geological data, or other data of the oil and gas reservoir, and obtain the analysis results;

[0019] Secondly, seismic wavelets are extracted based on the analysis results; based on the preprocessed oil and gas reservoir data, analysis results, and extracted seismic wavelets, wave impedance inversion is performed to obtain rock property data.

[0020] Furthermore, based on the preprocessed oil and gas reservoir data, analysis results, and extracted seismic wavelets, wave impedance inversion was performed to obtain rock property data, including:

[0021] First, the subsurface rock velocity of the oil and gas reservoir is extracted from the preprocessed oil and gas reservoir data. The subsurface rock velocity of the oil and gas reservoir is multiplied by the density data of the oil and gas reservoir to obtain the well wave impedance data of the oil and gas reservoir.

[0022] Secondly, the reflection coefficient is extracted based on the well wave impedance data; and a geological model of the oil and gas reservoir is constructed based on the analysis results, the oil and gas reservoir data, and the extracted seismic wavelet.

[0023] Then, based on the geological model of the oil and gas reservoir constructed by combining the seismic wavelet and other data, the wave impedance inversion body is obtained by using the sparse pulse inversion method.

[0024] Finally, based on the correlation between the oil and gas reservoir and the wave impedance inversion body, the property data of the oil and gas reservoir rocks are obtained.

[0025] Furthermore, the analysis module performs fracturing analysis on the extracted relevant index data of the oil and gas reservoir rocks, and obtains the following analysis results:

[0026] First, the relevant index data of the oil and gas reservoir rocks were corrected and normalized to obtain the preprocessed relevant index data of the oil and gas reservoir rocks.

[0027] Secondly, an evaluation model for the fracturing capability of oil and gas reservoir rocks was constructed, and the fracturing capability of oil and gas reservoir rocks was analyzed based on the relevant index data of pre-processed oil and gas reservoir rocks using the constructed evaluation model, and the analysis results were obtained.

[0028] Furthermore, the construction of the fracturing capability evaluation model for oil and gas reservoir rocks includes:

[0029] First, the relationships between the various indices of the fracturing capability analysis of oil and gas reservoir rocks are determined, and an initial evaluation model is established based on the analytic hierarchy process (AHP).

[0030] Secondly, the importance of each index in the fracturing ability analysis of oil and gas reservoir rocks is determined, and the indexes are ranked according to their importance.

[0031] Finally, based on the ranking results, the weights of each indicator are determined, and the initial evaluation model is optimized and adjusted in combination with the weights of each indicator to obtain the evaluation model for the fracturing capability of oil and gas reservoir rocks.

[0032] Furthermore, before determining the weight of each indicator based on the ranking results, it is necessary to construct a priority relationship matrix based on the ranking results of the importance of each indicator.

[0033] The optimization and adjustment of the initial evaluation model by combining the weights of the various indicators to obtain the oil and gas reservoir rock fracturing evaluation model includes:

[0034] The initial evaluation model is adjusted based on the priority relationship matrix of each indicator to obtain the evaluation model for the fracturability of oil and gas reservoir rocks.

[0035] Another object of the present invention is to provide a computer device, the computer device including a memory and a processor, the memory storing a computer program, the computer program being executed by the processor causing the processor to implement the experimental analysis system for the fracturing of oil and gas reservoir rocks.

[0036] Another object of the present invention is to provide a computer-readable storage medium storing a computer program, which, when executed by a processor, causes the processor to implement the experimental analysis system for the fracturing of oil and gas reservoir rocks.

[0037] Another objective of this invention is to provide an information data processing terminal for implementing the experimental analysis system for the fracturing capability of oil and gas reservoir rocks.

[0038] Based on the above technical solutions and the technical problems solved, please analyze the advantages and positive effects of the technical solution to be protected by this invention from the following aspects:

[0039] First, addressing the technical problems existing in the prior art and the difficulty in solving them, this paper closely analyzes, in conjunction with the technical solution to be protected by this invention and the results and data obtained during the research and development process, how the technical solution of this invention solves the technical problems, and the inventive technical effects brought about by solving these problems. The specific description is as follows:

[0040] This invention analyzes the fracturing capability of oil and gas reservoirs by analyzing their geological characteristics and rock properties. This ensures that the constructed evaluation model can accurately analyze fracturing capability, truly reflect the ease or difficulty of fracturing, and has a wide range of applications, applicable to different oil and gas reservoirs. At the same time, this invention does not require excessive data, and the analysis results are accurate and low-cost.

[0041] Second, considering the technical solution as a whole or from a product perspective, the technical effects and advantages of the technical solution to be protected by this invention are specifically described as follows:

[0042] This invention can continuously, completely, and accurately analyze the fracturing capability of oil and gas reservoir rocks, and the analysis results are true and reliable. Attached Figure Description

[0043] Figure 1 This is a flowchart of a method for determining rock attribute data based on preprocessed relevant data and seismic inversion methods provided in this embodiment of the invention.

[0044] Figure 2This is a flowchart of a method for determining rock properties by performing wave impedance inversion based on preprocessed oil and gas reservoir data, analysis results, and extracted seismic wavelets, as provided in this embodiment of the invention.

[0045] Figure 3 This is a flowchart illustrating the method by which the analysis module, based on extracted relevant index data of oil and gas reservoir rocks, performs fracturing analysis on oil and gas reservoir rocks and obtains the analysis results. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0047] I. Explanatory and Illustrative Embodiments. To enable those skilled in the art to fully understand how the present invention is specifically implemented, this section provides an explanatory and illustrative description of the embodiments described in the claims.

[0048] The oil and gas reservoir rock fracturing test analysis system provided in this embodiment of the invention includes:

[0049] The data acquisition module is connected to the central control module and is used to acquire logging data, geological data and other relevant data of oil and gas reservoirs.

[0050] The data preprocessing module, connected to the central control module, is used to preprocess the acquired well logging data, geological data, or other data from oil and gas reservoirs.

[0051] The central control module is connected to the data acquisition module, data preprocessing module, rock property data acquisition module, data analysis module, index screening module, index data extraction module, analysis module, storage module, and display module. It is used to control the normal operation of each module using a microcontroller, controller, and microprocessor.

[0052] The rock property data acquisition module is connected to the central control module and is used to determine the rock property data based on the preprocessed relevant data and the seismic inversion method.

[0053] The data analysis module, connected to the central control module, is used to analyze and determine the characteristics of oil and gas reservoirs based on preprocessed oil and gas reservoir-related data and rock property data.

[0054] The index screening module, connected to the central control module, is used to screen indices for fracturing analysis of oil and gas reservoir rocks based on the characteristics of the identified oil and gas reservoirs.

[0055] The index data extraction module is connected to the central control module and is used to extract relevant index data of the oil and gas reservoir rocks to be analyzed based on the index extraction of the fracturability analysis of the screened oil and gas reservoir rocks.

[0056] The analysis module, connected to the central control module, is used to perform fracturing analysis of oil and gas reservoir rocks based on the extracted relevant index data of oil and gas reservoir rocks, and to obtain the analysis results.

[0057] The storage module, connected to the central control module, is used to store the relevant data obtained from acquisition, preprocessing, and analysis.

[0058] The display module, connected to the central control module, is used to display rock property data, fracturing indexes, and fracturing analysis results of oil and gas reservoir rocks.

[0059] like Figure 1 As shown, the rock property data acquisition module provided in this embodiment of the invention determines rock property data based on preprocessed relevant data combined with seismic inversion methods, including:

[0060] S101: Obtain the pre-processed logging data, geological data, or other data of the oil and gas reservoir, analyze the pre-processed logging data, geological data, or other data of the oil and gas reservoir, and obtain the analysis results;

[0061] S102, Seismic wavelet extraction is performed based on the analysis results; based on the preprocessed oil and gas reservoir data, analysis results, and extracted seismic wavelet, wave impedance inversion is performed to obtain rock property data.

[0062] like Figure 2 As shown in the embodiment of the present invention, the wave impedance inversion based on preprocessed oil and gas reservoir data, analysis results, and extracted seismic wavelets yields rock property data including:

[0063] S201, extract the subsurface rock velocity of the oil and gas reservoir from the preprocessed oil and gas reservoir data, and multiply the subsurface rock velocity of the oil and gas reservoir with the density data of the oil and gas reservoir to obtain the well wave impedance data of the oil and gas reservoir.

[0064] S202, Extract the reflection coefficient based on the well wave impedance data; Construct a geological model of the oil and gas reservoir based on the analysis results, oil and gas reservoir data, and the extracted seismic wavelet;

[0065] S203, Based on the geological model of the oil and gas reservoir constructed by combining the seismic wavelet and other data, the wave impedance inversion body is obtained using the sparse pulse inversion method;

[0066] S204. Based on the correlation between the oil and gas reservoir and the wave impedance inversion body, the property data of the oil and gas reservoir rocks are obtained.

[0067] like Figure 3 As shown, the analysis module provided in this embodiment of the invention performs fracturing analysis on oil and gas reservoir rocks based on the extracted relevant index data, and obtains the following analysis results:

[0068] S301, The relevant index data of the oil and gas reservoir rocks are corrected and normalized to obtain the pre-processed relevant index data of the oil and gas reservoir rocks.

[0069] S302, Construct an evaluation model for the fracturing capability of oil and gas reservoir rocks, and use the constructed evaluation model for the fracturing capability of oil and gas reservoir rocks based on the relevant index data of pre-processed oil and gas reservoir rocks to conduct fracturing capability analysis of oil and gas reservoir rocks, and obtain the analysis results.

[0070] The fracturing evaluation model for oil and gas reservoir rocks provided in this embodiment of the invention includes:

[0071] First, the relationships between the various indices of the fracturing capability analysis of oil and gas reservoir rocks are determined, and an initial evaluation model is established based on the analytic hierarchy process (AHP).

[0072] Secondly, the importance of each index in the fracturing ability analysis of oil and gas reservoir rocks is determined, and the indexes are ranked according to their importance.

[0073] Finally, based on the ranking results, the weights of each indicator are determined, and the initial evaluation model is optimized and adjusted in combination with the weights of each indicator to obtain the evaluation model for the fracturing capability of oil and gas reservoir rocks.

[0074] Before determining the weight of each indicator based on the ranking results provided in this embodiment of the invention, the following step is required: constructing a priority relationship matrix based on the ranking results of the importance of each indicator.

[0075] The oil and gas reservoir rock fracturing evaluation model obtained by optimizing and adjusting the initial evaluation model by combining the weights of the various indicators provided in this embodiment of the invention includes:

[0076] The initial evaluation model is adjusted based on the priority relationship matrix of each indicator to obtain the evaluation model for the fracturability of oil and gas reservoir rocks.

[0077] II. Application Examples. To demonstrate the inventiveness and technical value of the present invention, this section provides application examples of the claimed technical solutions applied to specific products or related technologies.

[0078] This invention applies the oil and gas reservoir rock fracturing test analysis system to a computer device. The computer device includes a memory and a processor. The memory stores a computer program. When the computer program is executed by the processor, the processor executes the oil and gas reservoir rock fracturing test analysis system.

[0079] It should be noted that embodiments of the present invention can be implemented in hardware, software, or a combination of both. The hardware portion can be implemented using dedicated logic; the software portion can be stored in memory and executed by a suitable instruction execution system, such as a microprocessor or dedicated-design hardware. Those skilled in the art will understand that the above-described devices and methods can be implemented using computer-executable instructions and / or included in processor control code, for example, such code provided on a carrier medium such as a disk, CD, or DVD-ROM, a programmable memory such as read-only memory (firmware), or a data carrier such as an optical or electronic signal carrier. The devices and modules of the present invention can be implemented by hardware circuitry such as very large-scale integrated circuits or gate arrays, semiconductors such as logic chips, transistors, or programmable hardware devices such as field-programmable gate arrays, programmable logic devices, etc., or by software executed by various types of processors, or by a combination of the above-described hardware circuitry and software, such as firmware.

[0080] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications, equivalent substitutions, and improvements made by those skilled in the art within the scope of the technology disclosed in the present invention, and within the spirit and principles of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A system for experimental analysis of the fracturing capability of oil and gas reservoir rocks, characterized in that, The experimental analysis system for the fracturing capability of oil and gas reservoir rocks includes: The rock property data acquisition module is connected to the central control module and is used to determine the rock property data based on the preprocessed relevant data and the seismic inversion method. The data analysis module, connected to the central control module, is used to analyze and determine the characteristics of oil and gas reservoirs based on preprocessed oil and gas reservoir-related data and rock property data. The index screening module, connected to the central control module, is used to screen indices for fracturing analysis of oil and gas reservoir rocks based on the characteristics of the identified oil and gas reservoirs. The index data extraction module is connected to the central control module and is used to extract relevant index data of the oil and gas reservoir rocks to be analyzed based on the index extraction of the fracturability analysis of the screened oil and gas reservoir rocks. The analysis module, connected to the central control module, is used to perform fracturing analysis of oil and gas reservoir rocks based on the extracted relevant index data of oil and gas reservoir rocks, and to obtain the analysis results. The rock property data acquisition module determines the rock property data based on preprocessed relevant data and seismic inversion methods, including: First, the well logging data and geological data of the pre-processed oil and gas reservoir are obtained, and the well logging data and geological data of the pre-processed oil and gas reservoir are analyzed to obtain the analysis results. Secondly, seismic wavelets are extracted based on the analysis results; based on the preprocessed oil and gas reservoir data, analysis results, and extracted seismic wavelets, wave impedance inversion is performed to obtain rock property data. The wave impedance inversion based on preprocessed oil and gas reservoir data, analysis results, and extracted seismic wavelets to obtain rock property data includes: First, the subsurface rock velocity of the oil and gas reservoir is extracted from the preprocessed oil and gas reservoir data. The subsurface rock velocity of the oil and gas reservoir is multiplied by the density data of the oil and gas reservoir to obtain the well wave impedance data of the oil and gas reservoir. Secondly, the reflection coefficient is extracted based on the well wave impedance data; and a geological model of the oil and gas reservoir is constructed based on the analysis results, the oil and gas reservoir data, and the extracted seismic wavelet. Then, based on the geological model of the oil and gas reservoir constructed from the seismic wavelet, the wave impedance inversion body is obtained using the sparse pulse inversion method; Finally, based on the correlation between the oil and gas reservoir and the wave impedance inversion body, the property data of the oil and gas reservoir rocks are obtained.

2. The experimental analysis system for the fracturing capability of oil and gas reservoir rocks as described in claim 1, characterized in that, The oil and gas reservoir rock fracturing test analysis system also includes: The data acquisition module is connected to the central control module and is used to acquire logging data and geological data of oil and gas reservoirs. The data preprocessing module, connected to the central control module, is used to preprocess the acquired well logging data and geological data of oil and gas reservoirs. The central control module is connected to the data acquisition module, data preprocessing module, rock property data acquisition module, data analysis module, index screening module, index data extraction module, analysis module, storage module, and display module. It is used to control the normal operation of each module using a microcontroller, controller, and microprocessor. The storage module, connected to the central control module, is used to store the relevant data obtained from acquisition, preprocessing, and analysis. The display module, connected to the central control module, is used to display rock property data, fracturing indexes, and fracturing analysis results of oil and gas reservoir rocks.

3. The experimental analysis system for the fracturing resilience of oil and gas reservoir rocks as described in claim 1, characterized in that, The analysis module performs fracturing analysis on the extracted relevant index data of oil and gas reservoir rocks, and obtains the following analysis results: First, the relevant index data of the oil and gas reservoir rocks were corrected and normalized to obtain the preprocessed relevant index data of the oil and gas reservoir rocks. Secondly, an evaluation model for the fracturing capability of oil and gas reservoir rocks was constructed, and the fracturing capability of oil and gas reservoir rocks was analyzed based on the relevant index data of pre-processed oil and gas reservoir rocks using the constructed evaluation model, and the analysis results were obtained.

4. The experimental analysis system for the fracturing capability of oil and gas reservoir rocks as described in claim 3, characterized in that, The constructed oil and gas reservoir rock fracturing evaluation model includes: First, the relationships between the various indices of the fracturing capability analysis of oil and gas reservoir rocks are determined, and an initial evaluation model is established based on the analytic hierarchy process (AHP). Secondly, the importance of each index in the fracturing ability analysis of oil and gas reservoir rocks is determined, and the indexes are ranked according to their importance. Finally, based on the ranking results, the weights of each indicator are determined, and the initial evaluation model is optimized and adjusted in combination with the weights of each indicator to obtain the evaluation model for the fracturing capability of oil and gas reservoir rocks.

5. The experimental analysis system for the fracturing capability of oil and gas reservoir rocks as described in claim 4, characterized in that, Before determining the weight of each indicator based on the ranking results, it is necessary to construct a priority relationship matrix based on the ranking results of the importance of each indicator. The optimization and adjustment of the initial evaluation model by combining the weights of the various indicators to obtain the oil and gas reservoir rock fracturing evaluation model includes: The initial evaluation model is adjusted based on the priority relationship matrix of each indicator to obtain the evaluation model for the fracturability of oil and gas reservoir rocks.

6. A computer device, characterized in that, The computer device includes a memory and a processor. The memory stores a computer program, which, when executed by the processor, causes the processor to implement the oil and gas reservoir rock fracturing experimental analysis system as described in any one of claims 1-5.

7. A computer-readable storage medium storing a computer program, which, when executed by a processor, causes the processor to implement the experimental analysis system for the fracturing compressibility of oil and gas reservoir rocks as described in any one of claims 1-5.

8. An information data processing terminal, characterized in that, The information data processing terminal is used to implement the oil and gas reservoir rock fracturing test analysis system as described in any one of claims 1-5.

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