A numerical method for analyzing fault slip tendency under fluid injection with XFEM

doi:10.1007/s11440-019-00814-w

CORC > 力学研究所 > 中国科学院力学研究所 > 流固耦合系统力学重点实验室(2012-)

	A numerical method for analyzing fault slip tendency under fluid injection with XFEM
	Liu DQ(刘大庆)1,2
刊名	ACTA GEOTECHNICA
	2020-02-01
卷号	15 期号:2 页码:325-345
关键词	Coupling Fault slip tendency Fluid injection Fluid flow Fixed-stress split Geomechanics XFEM
ISSN号	1861-1125
DOI	10.1007/s11440-019-00814-w
通讯作者	Liu, Daqing(liudaqing10@126.com)
英文摘要	We propose a numerical method for analyzing fault slip tendency under fluid injection using the extended finite element method (XFEM) both for fluid flow and poroelasticity. The fault is modeled as a zero-thickness interface, and we use a reduced model for the fluid flow in the fault to account for its hydraulic behavior. We use the rate- and state-dependent friction model as the fault friction model, and Biot's theory of poroelasticity to study the coupling between fluid flow and mechanical deformation in the surrounding porous media. Since a fully coupled method between fluid flow and poromechanics is computationally expensive, we have investigated the use of the so-called fixed-stress split in this context. In such a scheme, the fluid flow problem is solved firstly by freezing the total means stress field, and then the results are used to solve the mechanical problem. The fixed-stress split is unconditionally stable, consistent and more accurate for a given number of iterations compared with other type of splitting strategies. In order to verify our method, some test cases are presented. For the coupling between fluid flow and poromechanics, we consider the Terzaghi Problem and the Mandel Problem, comparing our results with those of previously published works. While, for the mechanic problem, we compare the results with those obtained using the software Pylith.
分类号	二类/Q1
资助项目	China Scholarship Council (CSC)
WOS关键词	FINITE-ELEMENT-METHOD ; CRACK-GROWTH ; MODELING FRACTURES ; DYNAMIC CRACK ; FLOW ; FRICTION ; PROPAGATION ; APPROXIMATION ; STABILIZATION ; GEOMECHANICS
WOS研究方向	Engineering
语种	英语
WOS记录号	WOS:000512117200003
资助机构	China Scholarship Council (CSC)
其他责任者	Liu, Daqing
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/81532]
专题	力学研究所_流固耦合系统力学重点实验室(2012-)
作者单位	1.Politecn Milan, Dept Math, Modelling & Sci Comp Lab MOX, Milan, Italy 2.Chinese Acad Sci, Inst Mech, Beijing, Peoples R China;
推荐引用方式 GB/T 7714	Liu DQ. A numerical method for analyzing fault slip tendency under fluid injection with XFEM[J]. ACTA GEOTECHNICA,2020,15(2):325-345.
APA	刘大庆.(2020).A numerical method for analyzing fault slip tendency under fluid injection with XFEM.ACTA GEOTECHNICA,15(2),325-345.
MLA	刘大庆."A numerical method for analyzing fault slip tendency under fluid injection with XFEM".ACTA GEOTECHNICA 15.2(2020):325-345.