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Method, device and equipment for determining heterogeneity of shale gas reservoir

A technology of reservoir heterogeneity and heterogeneity, which is applied in the fields of extraction of undisturbed cores, earthwork drilling, measurement, etc., can solve the problem that it is difficult to truly and accurately reflect the heterogeneity of shale gas reservoirs, Problems such as the limited scope of evaluation of shale gas reservoirs

Active Publication Date: 2021-02-02
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology

[0006] The embodiment of the present application provides a method, device and equipment for determining the heterogeneity of shale gas reservoirs to solve the problem that the evaluation range of shale gas reservoirs in the prior art is limited, making it difficult to truly and accurately reflect The overall heterogeneity of shale gas reservoirs

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  • Method, device and equipment for determining heterogeneity of shale gas reservoir
  • Method, device and equipment for determining heterogeneity of shale gas reservoir
  • Method, device and equipment for determining heterogeneity of shale gas reservoir

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Embodiment Construction

[0033] The principle and spirit of the present application will be described below with reference to several exemplary embodiments. It should be understood that these embodiments are given only to enable those skilled in the art to better understand and implement the present application, rather than to limit the scope of the present application in any way. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of this disclosure to those skilled in the art.

[0034] Those skilled in the art know that the embodiments of the present application may be realized as a system, device, method or computer program product. Therefore, the disclosure of the present application can be specifically implemented in the form of complete hardware, complete software (including firmware, resident software, microcode, etc.), or a combination of hardware and software.

[0035] Considering that the existing shale gas reservoir ...

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Abstract

The present application provides a method, device and equipment for determining the heterogeneity of a shale gas reservoir, wherein the method includes: obtaining a set of multiple fracturing stages of the hydraulic fracturing operation curve of the target shale gas reservoir pressure data; based on the casing pressure data of each fracturing stage, empirical mode decomposition is performed to obtain multiple eigenmode functions of each fracturing stage and determine the number of eigenmode functions obtained from the decomposition; for each fracturing stage Multiple eigenmode functions are subjected to Hilbert transformation to obtain at least one Hilbert spectrum of each fracturing stage; based on the number of eigenmode functions obtained by decomposing each fracturing stage and at least A Hilbert spectrum identifying the heterogeneity of a target shale gas reservoir. In the embodiment of this application, based on the casing pressure data of the hydraulic fracturing construction curve of the target shale gas reservoir, the overall heterogeneity of the target shale gas reservoir can be truly and accurately determined, and further more Efficiently develop targeted shale gas reservoirs.

Description

technical field [0001] The present application relates to the technical field of geological exploration, in particular to a method, device and equipment for determining the heterogeneity of shale gas reservoirs. Background technique [0002] Reservoir heterogeneity refers to the property that various properties of the reservoir change with its spatial location, which can be mainly manifested in the heterogeneity of rock material composition and the heterogeneity of pore space. Reservoir heterogeneity is an important factor affecting A major factor in subsurface fluid movement and ultimate recovery. [0003] Existing methods for determining the heterogeneity of shale gas reservoirs usually collect core samples at multiple depths of shale gas reservoirs, test the properties of each core sample, and then use statistical methods to determine the heterogeneity of the entire reservoir. Heterogeneity; or based on geophysical logging data, using mathematical methods (such as variat...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/00E21B49/00E21B25/00E21B43/26
CPCE21B47/00E21B49/00
Inventor 李军张辉翟文宝
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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