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Rock performance evaluating device

A technology for evaluating devices and performance, applied in the direction of applying stable tension/pressure to test material strength, etc., can solve problems such as difficulties in rock strain measurement

Active Publication Date: 2014-06-18
PETROCHINA CO LTD
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Problems solved by technology

[0007] The embodiment of the present invention provides a rock performance evaluation device, which solves the technical problem of difficult rock strain measurement under high temperature conditions in the prior art

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Embodiment Construction

[0029] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the embodiments and accompanying drawings. Here, the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but not to limit the present invention.

[0030] In an embodiment of the present invention, a rock performance evaluation device is provided, such as figure 1 As shown, the device includes:

[0031] The pressure chamber 101, the pressure chamber 101 is a closed cavity, located within the scanning range of the CT equipment, used to provide a preset test temperature and a preset test pressure for the core sample, and the preset test temperature is higher than the first a threshold, the preset test pressure being higher than a second threshold;

[0032] The CT device 102 is used to scan the core sample 7 to obtain image informatio...

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Abstract

The embodiment of the invention provides a rock performance evaluating device. The device comprises a pressure chamber and a CT (computed tomography) device, wherein the pressure chamber is a sealed cavity body, is positioned in the scanning range of an X-ray computerized tomography CT device, and is used for providing preset testing temperature and preset testing pressure for a rock core test specimen, wherein the preset testing temperature is higher than a first threshold, and the preset testing pressure is higher than a second threshold; the CT device is used for scanning the rock core test specimen to acquire image information of the internal structure of the rock core test specimen at different time, and analyzing according to the image information so as to obtain a strain curve of the rock core test specimen. The embodiment of the invention prevents the situation that the rock strain is measured by a sensor at high temperature, thereby measuring the rock strain simply and accurately at high temperature.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploitation, in particular to an evaluation device for rock properties. Background technique [0002] Understanding the performance of underground rocks under different conditions, such as thermophysical properties, rock mechanics, hydraulics, etc., is of great significance for guiding drilling, well layout, and designing development strategies for oil and gas production. [0003] The traditional in-situ stress sensitivity test mainly focuses on the mechanical properties of rocks at formation temperature (<150 degrees), and the stress-strain curve, elastic modulus, Poisson's ratio, fracture angle, and slip friction coefficient are obtained through classic triaxial compression experiments , cohesion, internal friction angle and other parameters. [0004] With the increasing importance of unconventional oil and gas resources, research and development of new technologies for resources that c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/18
Inventor 张胜飞刘昊沈德煌李秀娈
Owner PETROCHINA CO LTD
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