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形成裂缝网络的裂缝性油气藏可用Kazemi模型、Warren-Root模型和DeSwaan模型进行描述,而没有形成裂缝网络的局部裂缝发育油藏就不适合应用这3种模型。针对低渗透油藏存在的局部裂缝特征,利用平行板理论、张量原理和等值渗流阻力原理,建立了裂缝区的等效连续介质模型,在等效连续介质模型的基础上,建立了低渗透油藏三维数值模型,并用黒油模拟程序进行实例计算。研究结果表明:等效连续介质模型可以应用到具有局部裂缝的低渗透油藏数值模拟和动态预测中。
The fractured reservoirs that form the fracture network can be described by the Kazemi, Warren-Root and DeSwaan models, whereas the locally fractured reservoirs without the fracture network are not suitable for the three models. According to the characteristics of local fractures existing in low permeability reservoirs, the equivalent continuum model of the fracture zone is established by using the theory of parallel plates, the tensor principle and the principle of equivalent seepage resistance. Based on the equivalent continuum model, a low Seepage reservoir three-dimensional numerical model, and black oil simulation program for example calculation. The results show that the equivalent continuum model can be applied to the numerical simulation and dynamic prediction of low permeability reservoirs with local fractures.