基于弹性力学理论,采用Galerkin有限元数值离散化方法,编制Matlab有限元程序,数值模拟两条相互垂直裂缝干扰时的“应力阴影”分布状态,其主应力与主方向分布具有关于交点(坐标原点)的对称性特征.分析了流压比值、孔隙压力、缝面流压及水平应力差值等因素对两缝间主应力及主方向的影响,通过改进变排量施工、改变压裂液黏度、油气井开采降低孔隙压力和增大注入液量等工艺,发挥应力阴影效应的优点,增加复杂缝网形成的可能性. Based on the theory of elastic mechanics, the Galerkin finite element numerical discretization method was used to develop Matlab finite element program to simulate the distribution of “stress shadow ” when two vertical cracks interfere with each other. The origin of coordinates) .The influence of flow pressure ratio, pore pressure, seam flow pressure and horizontal stress difference on the principal stress and main direction of the two joints was analyzed. By improving the construction of variable displacement, Liquid viscosity, oil and gas wells to reduce pore pressure and increase the amount of liquid injection process, the advantages of stress shadow effect, increase the possibility of complex seam network formation.