High-temperature and high-pressure hydrofracturing clamp holder and test method thereof

Abstract

The invention discloses a high-temperature and high-pressure hydrofracturing clamp holder and a test method thereof. The high-temperature and high-pressure hydrofracturing clamp holder comprises a test barrel, a barrel upper mounting part, a barrel lower mounting part and a barrel inner mounting part. A hydrofracturing test can be carried out for a small rock sample; a single test can be carried out by one person; the operation is convenient; the test success rate is high; and the single test cost is relatively low. The clamp holder has five seal designs in total, so that test failure caused by liquid leakage in a test process can be effectively avoided; seal parts are sealed in a related part compressing mode, and in a heating process or the test process, the seal parts can be continuously compressed; and a seal pre-tightening force application and provision part is specially designed in the barrel inner mounting part, so that expansion force after heating of the part in the test process can be resisted, research on a fracture mechanical behavior of a high-temperature and high-pressure rock mass under a thermal-mechanical coupling effect is facilitated, and theoretical basis and guidance can be provided for construction engineering of reservoir layers in high-temperature rock mass geothermal exploitation engineering.

Description

technical field [0001] The invention relates to a test instrument and a test method thereof, in particular to a high-temperature and high-pressure hydraulic fracturing method for studying the fracture mechanical behavior of high-temperature and high-pressure rock mass in an enhanced geothermal system reservoir construction project of a hot dry rock energy development project A holder and a test method thereof belong to the technical field of hot dry rock geothermal development and utilization. Background technique [0002] Hot dry rock (HDR) refers to high-temperature rocks (mainly metamorphic and crystalline rock masses) that occur 3-10 km below the ground at a temperature of 150-650 °C and contain no or a small amount of fluids. , low permeability, common mining is difficult to achieve, enhanced geothermal system (EGS) is currently the main technology of dry rock energy development projects, with the promotion of geothermal projects, the basic research and engineering appl...

AI Technical Summary

Problems solved by technology

The advantage of this test method is that it can visually analyze the shape of hydraulic fractures. However, the above-mentioned hydraulic fracturing physical test equipment mainly meets the high-pressure test environment. Mature, specifically manifested in technical problems such as the selection of pressure transmission medium, heating method, and sealing structure of the test device under high temperature and high pressure. This method is very easy to cause liquid leakage and lead to test failure; another convenience, the existing hydraulic fracturing devices are mostly aimed at large rock samples, and the single test is not only cumbersome to operate, but also high in cost

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