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A method and system for predicting formation shear failure capacity

A technology of formation stress and formation, applied in data processing applications, special data processing applications, instruments, etc., can solve the problems of less research on shear fractures and difficult detection of fracture types by seismic monitoring methods, so as to optimize fracturing construction parameters, The effect of reducing exploration and development costs and improving development efficiency

Active Publication Date: 2021-01-26
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0004] At present, there are few studies on shear fracture, and this type of fracture is difficult to detect with microseismic monitoring methods

Method used

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  • A method and system for predicting formation shear failure capacity
  • A method and system for predicting formation shear failure capacity
  • A method and system for predicting formation shear failure capacity

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Embodiment Construction

[0052] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and examples, so as to fully understand and implement the process of how to apply technical means to solve technical problems and achieve technical effects in the present invention. It should be noted that, as long as there is no conflict, each embodiment and each feature in each embodiment of the present invention can be combined with each other, and the formed technical solutions are all within the protection scope of the present invention.

[0053] Such as figure 1 Shown is a flow chart of a method for predicting formation shear fracture capacity according to an embodiment of the present invention, the following reference figure 1 The present invention will be described in detail.

[0054] The first step is step S110 critical condition calculation step, in which the critical condition for formation shear fracture to occur is calculated accordin...

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Abstract

The invention discloses a method and a system used for predicting shear fracture capacity of a formation. The method includes: a critical-condition calculation step, wherein a critical condition of shear fracture occurrence of the formation is calculated according to relationships of formation polymerization strength and formation stress; a polymerization strength calculation step, wherein the polymerization strength of the formation in shear fracture occurrence is calculated according to the critical condition and the relationships of the formation polymerization strength and the formation stress; and a critical-stress model establishment step, wherein a critical-stress model is established according to the polymerization strength and an internal friction coefficient of the formation in shear fracture occurrence. According to the method, fracturing construction parameters can be optimized, exploration and development costs of the shale gas formation can be reduced, and development efficiency of the shale formation can be improved.

Description

technical field [0001] The invention belongs to the technical field of petroleum exploration and development, and in particular relates to a method and system for predicting formation shear fracture capacity. Background technique [0002] Formation fractures usually include tensile fractures and shear fractures. Tensile rupture is the rupture that occurs when the applied stress exceeds the critical stress intensity factor of the formation when there are cracks or micro-cracks in the formation. There are many researches on Zhang Kuiku at present. [0003] Shear fracture is an important fracture type in formation fracturing process, which is mainly related to formation internal friction angle, aggregation strength and formation stress. [0004] At present, there are few studies on shear fracture, and this type of fracture is difficult to detect with microseismic monitoring methods. Contents of the invention [0005] In order to solve the above problems, the present invent...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06Q50/02G06F119/14
CPCG06Q50/02G06F30/13G06F30/367
Inventor 廖东良曾义金陆黄生王卫承达瑜
Owner CHINA PETROLEUM & CHEM CORP
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