【摘要】 研究了倾斜油井井眼周围含天然裂纹的孔隙岩体的机械力学行为及其与流体流动耦合的力学问题。模型中将含天然裂纹的孔隙岩体看作双孔隙介质,即孔隙岩体和其中包含的裂隙系统。孔隙岩体和裂隙系统二者具有不同的孔隙率和不同的渗透特性。模型将孔隙岩体、裂隙系统、以及流体的流动三者耦合起来考虑,在分析中考虑了岩体和裂隙系统二者不同的孔隙率和不同的渗透率。并给出了任意倾角的孔隙裂隙岩体中井孔围岩的变形与岩体内部流体的流动的数值解。更多还原

【Abstract】 The mechanical behaviour of rockmass around an arbitrary inclined borehole and its coupling with multiphase flow were investigated.A dual porosity finite element method was used in this study.In the model adopted here,rockmass which consists natural cracks and pores was taken as dual-porous continum.The porous rock matrix and the crack system have different seepage behaviour.The behaviour of porous rock matrix,property of crack set,together with the multiphase flow,have been coupled into a dual porosity multiphase multi-field finite element formulation.Numerical solutions are presented at the end of the paper.更多还原