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针对双重介质地质特征和油气实际流动过程,同时考虑了双重介质的应力敏感特性以及油藏-井筒耦合流动的影响,将变形双重介质油藏渗流与井筒管流作为整体进行研究,建立了变形双重介质径向油藏与井筒耦合单相流动模型;针对模型方程的强非线性,采用无条件稳定的全隐式方法对模型进行离散,应用Newton迭代方法求解,得到模型数值解;并探讨了依赖产量和形状因子的裂缝压力动态变化规律,给出了压力图版。
Considering the geologic characteristics of dual media and the actual flow of oil and gas, considering the stress sensitivity of dual media and the influence of reservoir-wellbore coupling flow, the seepage of wellbore and deformation of wellbore are studied as a whole. Medium radial reservoir and wellbore coupling single-phase flow model. For the strong nonlinearity of the model equations, the model is discretized by an all-implicit method with unconditional stability. The Newton iterative method is used to solve the model. Numerical solutions of the model are also discussed. And the shape factor of the crack pressure dynamic changes, given pressure chart.