论文部分内容阅读
针对缝洞型碳酸盐岩油藏的储层空间特征,提出新的数值模拟方法,溶穴、裂缝、孔洞分别建立各自的离散空间,离散空间之间由流动方程控制流量,扩展了多重介质的理论模型。数值计算上用基于控制体积分的有限差分方法来离散处理,各种介质的非线性方程组通过牛顿拉夫松方法全隐式求解。计算结果与解析解对比,验证了其正确性。该模型更加适用于缝洞型油藏的数值模拟研究。
Aiming at the reservoir space characteristics of fractured-cavity carbonate reservoirs, a new numerical simulation method is proposed, in which cavities, fractures and vugs are respectively set up to separate discrete flows. Flow equations are used to control flow between discrete spaces and extend multi-media The theoretical model. In numerical calculation, the finite difference method based on control volume is used for discrete processing. The nonlinear equations of various media are totally implicitly solved by the Newton-Raphson method. The calculated results are compared with the analytical solutions to verify its correctness. The model is more suitable for numerical simulation of fractured-cavity reservoirs.