Method for measuring dynamic damage degree of rock in confining pressure condition

A dynamic, rock-based technology, applied in the direction of using stable tension/pressure to test material strength, measuring device, strength characteristics, etc., to achieve the effect of convenient operation, solving actual engineering needs, and simple process

Inactive Publication Date: 2018-04-20
CHINA UNIV OF PETROLEUM (BEIJING)
View PDF8 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the oilfield site, the longitudinal wave and shear wave velocity of the surrounding rock of the oil well wall are obtained by means of acoustic logging of the oil well, and the elastic parameters of the

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for measuring dynamic damage degree of rock in confining pressure condition
  • Method for measuring dynamic damage degree of rock in confining pressure condition
  • Method for measuring dynamic damage degree of rock in confining pressure condition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] The present invention proposes a method for measuring the dynamic damage degree of rock under confining pressure conditions, comprising the following steps: 1) placing the acoustic wave transmitting probe and the acoustic wave receiving probe of the acoustic wave testing system in two fixed indenters respectively, and placing the prepared stratum The rock specimen is fixed between two fixed indenters; 2) The specimen and the fixed indenter are placed in the triaxial testing machine, and the confining pressure is applied to the specimen by the triaxial testing machine and the axial preload is carried out, and the sound wave is started. The test system obtains the initial acoustic wave velocity of the specimen; 3) While the triaxial testing machine is axially loading the specimen, the acoustic wave testing system is turned on to collect the axial load and acoustic wave velocity, and the data collection is stopped when the specimen reaches failure, and the specimens are remo...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Diameteraaaaaaaaaa
Login to view more

Abstract

The invention provides a method for measuring the dynamic damage degree of rock in a confining pressure condition. The method comprises: 1) arranging a sound wave emission probe and a sound wave reception probe of a sound wave test system at two fixed pressure heads, and fixing a manufactured stratigraphic rock test piece between the two fixed pressure heads; 2) putting the test piece and fixed pressure heads in a triaxial testing machine, applying the confining pressure to the test piece via the triaxial testing machine and performing axial pre-loading, and starting the sound wave test systemto obtain the initial sound wave speed of the test piece; 3) while performing axial loading on the test piece through the triaxial testing machine, starting the sound wave test system to collect theaxial load and sound wave speed, stopping data collection when the test piece is broken, reducing the axial pressure and confining pressure from the test piece in sequence, and taking the test piece out to finish the test; and 4) treat the experimental data to obtain a dynamic damage degree and stress state curve, and calculating the damage degree of surrounding rock of a target well section according to the sound wave well-logging data of an oil well.

Description

technical field [0001] The invention belongs to the field of petroleum engineering rock mechanics, in particular to a method for measuring the dynamic damage degree of rock under confining pressure conditions. Background technique [0002] Oil drilling engineering refers to the use of special drilling equipment and technology to drill a certain diameter cylindrical wellbore at a predetermined surface position in the oil storage block discovered through exploration, and drill into the underground oil and gas layer. In practice, during the drilling and production process of the rock mass around the wellbore, the surrounding rock of the borehole wall is damaged to varying degrees due to the external load such as the original in-situ stress, and the surrounding rock of the borehole wall has elastic zones and damaged zones at the same time. In addition, in the process of hydraulic fracturing, the pressure of the fracturing fluid will also cause damage to the surrounding rock of t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01N3/02G01N3/06G01N3/08
CPCG01N3/02G01N3/06G01N3/08
Inventor 张广清王元元丁祥庄建满
Owner CHINA UNIV OF PETROLEUM (BEIJING)
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap