Damage intensity calculation method and damage intensity calculation device

A technology of strength calculation and damage coefficient, which is applied to the analysis of solids, instruments, and materials using sonic/ultrasonic/infrasonic waves. It can solve the problem of low reliability of damage intensity and achieve the effect of improving low reliability.

Inactive Publication Date: 2018-09-28
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology

[0004] In view of this, the object of the present invention is to provide a damage strength calculation method and a damage str

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  • Damage intensity calculation method and damage intensity calculation device
  • Damage intensity calculation method and damage intensity calculation device
  • Damage intensity calculation method and damage intensity calculation device

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[0055] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is only a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

[0056] Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the a...

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Abstract

The invention provides a damage intensity calculation method and a damage intensity calculation device, and relates to the technical field of shale hydration damage evaluation, wherein the damage intensity calculation method comprises the following steps of obtaining a first sound wave time difference, a first attenuation coefficient, a first maximum vibration amplitude and a first main frequencyof the shale; obtaining a second sound wave time difference, a second attenuation coefficient, a second maximum vibration amplitude and a second main frequency of the shale after the hydration treatment; performing calculation according to the first sound wave time difference, the second sound wave time difference, the first attenuation coefficient, the second attenuation coefficient, the first maximum vibration amplitude, the second maximum vibration amplitude, the first main frequency and the second main frequency to obtain the damage intensity after the shale hydration. By using the method,the problem of lower damage intensity reliability after the shale hydration obtained through the calculation in the prior art can be solved.

Description

technical field [0001] The invention relates to the technical field of shale hydration damage evaluation, in particular to a damage strength calculation method and a damage strength calculation device. Background technique [0002] The problem of wellbore instability has always been a major and difficult problem in the oil and gas industries. Among them, during the drilling process of hard and brittle shale formations, the drilling fluid will cause hydration damage to the shale and reduce the stability of the wellbore wall, resulting in frequent downhole complex situations and affecting safe drilling. The hydration damage evaluation of hard and brittle shale has been extensively studied in the field of drilling. Considering that the drilling operation is located in deep formations, usually based on petrophysical characteristics, well logging information is used to obtain formation rock information, and the impact of drilling fluid on water in shale formations is evaluated. ...

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Application Information

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IPC IPC(8): G01N29/04G01N29/07G01N29/11G01N29/12
CPCG01N29/04G01N29/07G01N29/11G01N29/12G01N2291/011G01N2291/015
Inventor 刘向君丁乙罗平亚梁利喜熊健
Owner SOUTHWEST PETROLEUM UNIV
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