离散裂缝性油藏数值模拟方法

Discrete fracture numerical simulation methods for reservoirs

针对存在控制油水流动方向的离散裂缝性油藏难以进行数值模拟的问题,提出对该类油藏进行数值模拟的改进方法;在离散裂缝网络模型的基础上,分别给出流体在裂缝-基质和裂缝间的窜流方程,建立含有该窜流项的基岩系统和裂缝系统的数学模型,并采用有限单元法进行数值求解,得到包含时间项的压力和饱和度的总特征矩阵方程.模拟检验结果表明该方法具有良好的模拟效果.

Aiming at the problem of reservoir numerical simulation that can't simulate the reservoir of control oil-water flow direction by discrete fracture,this paper proposes a new simulation method for this kind of reservoir.The method is obtained new interporosity flow equation between matrix and fracture and between fracture and fracture based on discrete fracture network model,and then establishes the matrix system mathematic model and the fracture system mathematic model,and unifies a calculation matrix to solve by finite element.At last,the method is experimented by an example and achieved a good result of reservoir numerical simulation.