Large-size dry hot rock in-situ fracturing test device

Abstract

The invention relates to the field of fracturing technology equipment, in particular to a large-size dry hot rock in-situ fracturing test device. The device comprises a square fracturing box used forcontaining rock, a lower fixing plate is arranged at the bottom of the fracturing box, and the rock is arranged on the lower fixing plate; thin heavy-load pressurizing plates are arranged between theperiphery of the fracturing box and the rock respectively, and the thin heavy-load pressing plates are connected with a pressurizing system; an injection well is pre-buried in the center of the rock,and an upper fixing plate is arranged above the rock; a pipeline used for being connected with the injection well is arranged in the upper fixing plate, and a hydraulic loading cylinder is installed on the upper fixing plate; an upper supporting base connected with the fracturing box is arranged above the hydraulic loading cylinder, and the hydraulic loading cylinder for pushing the upper fixing plate to press the rock is arranged between the upper supporting base and the upper fixing plate. A flexible loading plate is used so that the device has the advantages of being small in size and largein loading pressure. A heat fluid can be adopted in the thin heavy-load pressurizing plates and directly exchanges heat with the rock, so that high-temperature loading under the vacuum three-axis loading condition of the dry hot rock is guaranteed.

Description

technical field [0001] The invention relates to the field of fracturing technical equipment, in particular to an in-situ fracturing experimental device for large-scale hot dry rock. Background technique [0002] The geothermal energy contained in the hot dry rock in the earth's crust is huge, and has become a new energy source that is mainly researched and developed by countries all over the world. The field test research of the enhanced geothermal engineering for the development of hot dry rock resources requires a large investment, a long cycle, and high risks. It is necessary to carry out laboratory research on hot dry rock hydraulic fracturing before construction of normal engineering projects for fracturing and artificial thermal reservoirs. The hot rock enhanced hydraulic fracturing simulation device provides parameters and technical support for on-site fracturing process design and reservoir stimulation. [0003] At present, the domestic research on crack initiation ...

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to provide a large-scale hot dry rock in-situ fracturing experimental device, which can effectively solve the problems of large-scale true triaxial simulation of hot dry rock, large volume, low loading pressure and inability to realize high temperature loading.

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