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Experimental device for stress freezing during fracturing

A technique of stress freezing, experimental setups, applied to measuring devices, using applied stable tension/compression to test material strength, instruments, etc.

Pending Publication Date: 2018-11-23
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention provides a stress freezing experimental device in the fracturing process to realize intuitive observation and transparent display of the evolution law of the stress field at the tip of the fracture when the complex fracture network is cracked and expanded during the fracturing process

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  • Experimental device for stress freezing during fracturing
  • Experimental device for stress freezing during fracturing
  • Experimental device for stress freezing during fracturing

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Embodiment Construction

[0066] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

[0067] The invention provides a stress freezing experimental device in the fracturing process to realize the direct observation and transparent display of the evolution rule of the stress field at the tip of the fracture when the complicated fracture network is initiated and expanded in the fracturing process.

[0068] Specifically, the stress freezing experimental device for the fracturing process includes:

[0069] The temperature control system includes an incubator 101, which is used to...

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Abstract

The invention provides an experimental device for stress freezing during fracturing. A test piece arranged in a thermostat of a temperature control system is heated and cooled under the correspondingtemperature control by means of the temperature control system according to a photosensitive curve and a preset temperature gradient, so that the stress freezing of the test piece is realized; the test piece is fixed and applied with corresponding pressure by means of a true triaxial servo loading system; a fracturing body pumping system, having an output end arranged in the thermostat, is used for performing a corresponding fracturing test on the test piece; since the test piece is a transparent photosensitive model printed by means of a 3D printer, by combining the stress loading of the truetriaxial servo loading system, a stress freezing experiment under the precise temperature control of the temperature control system and a fracturing experiment of the fracturing body pumping system,visual observation and transparent display of the evolution law of a crack tip stress field can be realized during the crack initiation of a complex joint in the fracturing process.

Description

technical field [0001] The invention relates to the technical field of stress freezing, in particular to a stress freezing experimental device in a fracturing process. Background technique [0002] At present, the law of fracture evolution in the fracturing process of unconventional reservoir rock media is a "black box" problem. Therefore, most of the existing laboratories' research on the fracturing process of various phase fracturing media is focused on the qualitative analysis of the distribution characteristics of the fracture network formed after fracturing. And the stress field evolution process that plays a decisive role in expansion. [0003] In the prior art, there is also a numerical simulation method to quantitatively analyze the distribution and evolution law of the stress field during the crack propagation process. However, it is worth noting that the geometric model, boundary conditions, grid model, A series of problems such as unit contact and separation, ma...

Claims

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Application Information

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IPC IPC(8): G01N3/18
CPCG01N3/18G01N2203/0256G01N2203/006G01N2203/0222G01N2203/0226G01N2203/0019G01N2203/0048G01N3/12G01N3/60G01N2203/0228Y02P10/25G01N2203/026G01N2203/0062
Inventor 鞠杨刘鹏徐志民刘红彬杨永明
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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