基于扩展有限元法的碳酸盐岩地热储层岩体裂缝扩展行为

王伟; 付豪; 邢林啸; 柴波; 刘波; 施星宇

doi:10.3799/dqkx.2021.005

Volume 46 Issue 10

Nov. 2021

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Wang Wei, Fu Hao, Xing Linxiao, Chai Bo, Liu Bo, Shi Xingyu, 2021. Crack Propagation Behavior of Carbonatite Geothermal Reservoir Rock Mass Based on Extended Finite Element Method. Earth Science, 46(10): 3509-3519. doi: 10.3799/dqkx.2021.005

Citation:

Wang Wei, Fu Hao, Xing Linxiao, Chai Bo, Liu Bo, Shi Xingyu, 2021. Crack Propagation Behavior of Carbonatite Geothermal Reservoir Rock Mass Based on Extended Finite Element Method. Earth Science, 46(10): 3509-3519. doi: 10.3799/dqkx.2021.005

Citation:

Wang Wei, Fu Hao, Xing Linxiao, Chai Bo, Liu Bo, Shi Xingyu, 2021. Crack Propagation Behavior of Carbonatite Geothermal Reservoir Rock Mass Based on Extended Finite Element Method. Earth Science, 46(10): 3509-3519. doi: 10.3799/dqkx.2021.005

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Crack Propagation Behavior of Carbonatite Geothermal Reservoir Rock Mass Based on Extended Finite Element Method

doi: 10.3799/dqkx.2021.005

Wang Wei^{1
,
,},
Fu Hao¹,
Xing Linxiao²,
Chai Bo¹,
Liu Bo¹,
Shi Xingyu¹

1.
School of Environmental Studies, China University of Geosciences, Wuhan 430078, China
2.
Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang 050061, China

Received Date: 2020-12-18
Available Online: 2021-11-03
Publish Date: 2021-11-03

Abstract

Abstract

Hydraulic fracturing is one of the main geothermal energy exploitation methods, and its fracturing effect is not only related to the basic physical and mechanical properties of the rock mass, but also closely related to the distribution of fractures, the state of in-situ stress, and the engineering parameters of fracturing. To explore the influence of the above factors of the fracture propagation behavior in the process of hydraulic fracturing, in this paper it takes the carbonatite reservoir rock mass in Jizhong depression as the research object. Based on the extended finite element method, a fracture propagation fluid-solid coupling model is established and analyzed. The influence of parameters such as horizontal stress difference, perforation azimuth angle, injection fluid displacement, and fracturing fluid viscosity on fracture propagation behavior. The results show: When a single fracture propagates, the smaller the perforation azimuth angle and the larger the injection rate, the more conducive to fracture propagation. When double cracks propagate, the horizontal stress difference increases, and the degree of crack deflection decreases. When hydraulic fractures intersect with natural fractures, the smaller horizontal stress difference is beneficial to the opening of natural fractures.
- geothermal reservoir,
- hydraulic fracturing,
- extended finite element,
- crack propagation,
- numerical simulation

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References(57)

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Crack Propagation Behavior of Carbonatite Geothermal Reservoir Rock Mass Based on Extended Finite Element Method

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