Theoretical analysis of ground displacements induced by deep fluid injection based on fully-coupled poroelastic simulation

作     者：Guoyan Jiang Guoyan Jiang

作者机构：School of Geodesy and GeomaticsWuhan UniversityWuhanChina Earth System Science ProgrammeThe Chinese University of Hong KongHong KongChina 

出 版 物：《Geodesy and Geodynamics》 (大地测量与地球动力学（英文版）)

年 卷 期：2021年第12卷第3期

页      面：197-210页

核心收录：

学科分类：0709[理学-地质学] 081803[工学-地质工程] 0707[理学-海洋科学] 08[工学] 0708[理学-地球物理学] 0818[工学-地质资源与地质工程] 0705[理学-地理学] 0815[工学-水利工程] 0825[工学-航空宇航科学与技术] 0704[理学-天文学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：who provided financial support for this study supported by the CUHK Research Fellowship Scheme(4200555) NSFC/RGC joint Research Scheme(NCUHK418/15) 

主　　题：Injection-induced deformation Open and sealed reservoirs Geological and operational parameters Poroelastic simulation Geodetic monitoring 

摘      要：Observations of surface displacements are expected to aid in geomechanical analyses of injectioninduced ***,the controlling factors of the displacement magnitude remain poorly understood except the elastic modulus of the fluid-bearing ***,an experiment scheme of numerical simulation based on fully-coupled poroelasticity is designed to investigate the displacements induced by deep underground fluid *** to the sealing ability of deep reservoirs,the numerical experiments are classified into two scenarios:injection into open and sealed *** effects from both geological and operational parameters are considered during the experiments,which include the hydromechanical properties,the reservoir geometry,injection rates and *** results reveal that in addition to the reservoir depth and Young’s modulus,the porosity also has significant influences on the surface *** modeling of injection-induced displacements should include the parameter of reservoir *** the reservoir is characterized by a good sealing ability,fluid injection is prone to induce larger horizontal displacements than vertical *** of injection activities including hydraulic fracturing can probably induce detectable surface *** surveying,especially using Global Navigation Satellite System(GNSS)with both horizontal and vertical observations,should become an essential monitoring task for anthropogenic fluid injection/production activities,which is conducive to assess and mitigate some geohazards including earthquakes.