【摘要】 该文应用连续介质力学理论建立了与蒸汽注入过程相关的热-流-变形耦合问题的基本数学模型;应用全隐式顺序Galerkin有限元数值解方案,对注蒸汽井的热-流体-变形耦合过程进行了数值模拟。结果表明,由于低渗透页岩地层流体高温膨胀导致的超高孔隙压力,有可能产生拉张应力,严重时会导致地层破裂。更多还原

【Abstract】 Based on the continuum mechanics theory,a coupled thermal structural-hydraulic-mechanics model is presented in this paper.A Galerkin finite element method based on the fully implicit and sequential iterative algorithm is used to simulate the thermal-hydraulic-mechanical process around the injection well.A case study is given.The results show that excess pore pressure is induced in this process due to the higher thermal expansion of fluid in low permeability shale,which may lead to the development of tensile effective stress and fracturing or failure of structure.更多还原