Rock overpressure fracture judgment index determination and judgment method, equipment and storage medium

A rock and index technology, applied in the field of oil and gas exploration, can solve problems such as lack of conclusions, rock overpressure fracture, etc., and achieve the effect of simple operation and easy implementation

Pending Publication Date: 2022-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Then, when the overpressure reaches the degree, the rock will undergo overpressure fracture, but so far there is no conclusion.

Method used

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  • Rock overpressure fracture judgment index determination and judgment method, equipment and storage medium
  • Rock overpressure fracture judgment index determination and judgment method, equipment and storage medium
  • Rock overpressure fracture judgment index determination and judgment method, equipment and storage medium

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Embodiment 1

[0053] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0054] Terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates otherwise, "multiple" Generally contain at least two.

[0055] It sho...

Embodiment 2

[0081] In this embodiment, the method for determining the overpressure fracture identification index of mud shale is taken as an example to further illustrate the present invention.

[0082] Shale fractures refer to a discontinuous surface where rocks fracture and produce cracks, and there is no obvious displacement between rock blocks on both sides of the fracture surface. It is not only a storage space for oil and gas, but also a channel for fluid seepage. Due to the inherent characteristics of mud shale itself, such as fine mineral particles, rhythm, bedding / lamina development, and often rich in organic matter, etc., the formation and evolution of its fractures have unique characteristics and petroleum geological significance. Therefore, the study of shale fractures has always been an important content in the research of oil and gas exploration and development, so the measured data of shale fracturing is especially critical.

[0083] Such as image 3 Shown is the profile ...

Embodiment 3

[0112] The present invention also provides a rock overpressure fracture discrimination method, such as figure 2 shown, including:

[0113] Step 401: Acquiring the measured data of rock fracturing, the measured data of rock fracturing includes the minimum horizontal principal stress of the rock in the research area, the density of the overlying formation and the lateral pressure coefficient;

[0114] Step 402: Determine additional structural stress coefficients based on the measured fracturing data;

[0115] Step 403: Determine the rock overpressure fracture identification index based on the additional structural stress coefficient, and the overpressure fracture identification index includes the overpressure fracture pressure coefficient;

[0116] Step 404: Based on the rock fluid pressure coefficient and the overpressure fracture pressure coefficient, determine whether the rock has undergone overpressure fracture.

[0117] Determining the additional structural stress coeffi...

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Abstract

The invention provides a rock overpressure fracture identification index determination method, a rock overpressure fracture identification index determination device, a rock overpressure fracture identification index determination method, a rock overpressure fracture identification index determination device and a storage medium, the rock overpressure fracture identification index determination method comprises the following steps: inputting rock fracture measured data into a trained machine learning model to obtain an additional tectonic stress coefficient, determining a rock overpressure fracture identification index based on the additional tectonic stress coefficient, and determining the rock overpressure fracture identification index according to the determined rock overpressure fracture identification index. And based on the rock fluid pressure coefficient and the overpressure fracture pressure coefficient, whether overpressure fracture happens to the rock or not is judged. The influence of additional tectonic stress is considered, the overpressure fracture condition of the rock is reflected more accurately, and key technical parameters are provided for cover layer integrity evaluation in conventional oil and gas reservoir-forming preservation condition research and hydraulic fracturing in shale gas development.

Description

technical field [0001] The invention belongs to the field of oil and gas exploration, and in particular relates to a rock overpressure fracture identification index determination and identification method, equipment and storage medium. Background technique [0002] Due to undercompaction (unbalanced compaction), hydrocarbon generation, hydrothermal pressurization, and clay mineral transformation, overpressure often occurs in rocks, and undercompaction and hydrocarbon generation can independently generate large-scale overpressure There are two main mechanisms. When the overpressure reaches a certain level, the rock will fracture, resulting in the release of the overpressure and turning it into normal pressure. Then, when the overpressure reaches the degree, the rock will undergo overpressure fracture, but so far there is no conclusion. [0003] Therefore, a high-precision index for judging rock fracture is urgently needed. Contents of the invention [0004] In order to s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/27G06K9/62G06N20/00G06Q10/06G06F113/08G06F119/14
CPCG06F30/27G06N20/00G06Q10/06393G06F2119/14G06F2113/08G06F18/214
Inventor 袁玉松张荣强李双建
Owner CHINA PETROLEUM & CHEM CORP
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