实时高温高应力真三轴压裂试验系统研制与应用

doi:10.3724/1000-6915.jrme.2024.0665

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Abstract To investigate the initiation and propagation of fractures in deep oil, gas, and geothermal energy reservoir stimulation, an independently developed real-time high-temperature and high-stress true triaxial fracturing test system was created. This system bridges the gap between laboratory fracturing simulations and actual deep reservoir conditions. It is designed to simulate the fracturing and fracture propagation behavior of 300 mm cubic rock samples under in-situ deep reservoir conditions. The system monitors and processes parameters such as stress, displacement, pump pressure, flow rate, and acoustic emission signals during fracture propagation. The maximum stress in the X, Y, and Z directions can reach 88 MPa, and the internal temperature of the sample can be heated to 350 ℃. The intelligent temperature control mode ensures uniform heating of the entire sample, and the maximum pump pressure is 210 MPa when slickwater is used as the fracturing medium (120 MPa with supercritical CO2). The system has successfully conducted hydraulic fracturing tests of shale and supercritical CO2 fracturing tests of granite under high-temperature and high-stress conditions. The test results demonstrate high accuracy and good stability. Under high-stress conditions, post-peak fluctuations in the pump pressure curve are intensified. High temperatures reduce breakdown pressure and increase fracture complexity. When supercritical CO2 is used as the fracturing medium, the breakdown pressure of granite significantly decreases, the number and energy level of acoustic emission signals weaken, and fracture complexity increases. These findings provide theoretical and technical support for optimizing deep reservoir reconstruction technology.

Key words： rock mechanics;high-temperature and high-stress true triaxial;fracturing physical simulation;deep reservoir;supercritical CO2

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	Articles by authors
	GUO Wuhao1
	2
	GUO Yintong1
	2
	CHANG Xin1
	2
	WU Mingyang1
	2
	HE Yuting1
	2
	BI Zhenhui1
	2
	ZHANG Xinao1
	2
	TENG Shilong1
	2
	WANG Lei1
	2
	YANG Chunhe1
	2

Cite this article:

GUO Wuhao1,2,GUO Yintong1, et al. Development and application of a real-time high-temperature and high-stress true triaxial fracturing test system[J]. , 2025, 44(6): 1539-1552.

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https://rockmech.whrsm.ac.cn/EN/10.3724/1000-6915.jrme.2024.0665 OR https://rockmech.whrsm.ac.cn/EN/Y2025/V44/I6/1539

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