窗口技术在油藏数值模拟中的应用

Application of windowing technique in reservoir simulation

将快速自适应组合网格方法(FastAdaptiveCompositeGrid,简称FAC方法)用于油藏数值模拟局部网格加密技术中。局部加密区域可以像窗口一样,随实际问题需要灵活地开启和关闭,或改变大小,无需在整个模拟阶段都采用局部加密网格。在实用全隐油藏数值模拟器MURS上实现了窗口技术。数值实验表明,采用窗口技术的模拟结果与全细网格计算的结果非常接近,并且比整个模拟阶段都进行局部网格加密节约8%的CPU时间,比全细网格节约37%的CPU时间。表明窗口技术切实可行。

The fast adaptive composite (FAC) grid technology can be applied in fully implicit black oil simulator MURS to open and close the LGR (local grid refinement regions, i.e. windows). Size of the LGR, when necessary, can be adjusted anywhere between on and off position during the entire simulation process. The numerical experiments demonstrate that results from this windowing technique are approximate to the global fine grid, but it saves 8% CPU time compared with the fixed local grid refinement method, and 37% CPU time when it compared with the global fine grid, respectively.