Shear instability in geothermal fields under hydromechanical feedback

Author:

Chen Jing1ORCID,Tang Xiaojie1ORCID,Hu Manman2ORCID

Affiliation:

1. The University of Hong Kong, Department of Civil Engineering, Hong Kong SAR, China.

2. The University of Hong Kong, Department of Civil Engineering, Hong Kong SAR, China. (corresponding author)

Abstract

A recent trend in improving the seismic safety and economic efficiency of enhanced geothermal systems in deep rock formation has led to an interest in the underlying mechanisms of shear stimulation. This contribution investigates the formation of shear localization patterns around an injection hole in deep geothermal reservoirs considering thermo-hydro-mechanical coupled processes. The constitutive formulation treats the target rock layer as an elasto-visco-plastic material with an Arrhenius dependence taking into account the effect of pore fluid pressure. Considering the thermal pressurization effect resulting from frictional heating, the role of system heterogeneity and the influence of injected fluid temperature are investigated. The findings of this study indicate that a deeper layer and a hotter injection would favor localized shear deformation around a deep borehole and hence an effective network of fluid pathways.

Funder

Research Grant Council of Hong Kong

Publisher

Society of Exploration Geophysicists

Subject

Geochemistry and Petrology,Geophysics

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3