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A New Method for the Fast Estimation of Reservoir Performance

机译：快速估算储层性能的新方法

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Recent advances in applications of geostatistics to reservoir characterization have produced increasingly sophisticated geological models which have put considerable demands on the engineer's ability to do rapid reservoir performance evaluation. With this motivation in mind, a new method for fast reservoir simulation based on an unconventional formulation has been developed. This formulation has flux-based unknowns, in contrast to more conventional approaches which typically have pressure-based unknowns. For a useful range of conditions, the flux-based unknowns experience little or no variation over time throughout most of the reservoir domain, enabling fast simulations of fluid movement in the reservoir. In conjunction with iterative solvers that dynamically adapt to conditions in the reservoir, this formulation has been used to create a new simulator, designated as FMF (for Flux-based Multi-phase Flow). The FMF algorithm includes a rigorous mass conservation scheme that maintains accurate material balance throughout the entire simulation. Studies of overall accuracy and computational efficiency for a series of case studies have been carried out with the simulator. These studies are based on comparisons with Eclipse, with all computations done on a common platform to facilitate CPU timing studies. For the cases considered, these studies have revealed that the FMF algorithm is approximately one order of magnitude faster than Eclipse, and produces similar results.
机译：地统计学在油藏特征描述中的最新进展已经产生了越来越复杂的地质模型，这对工程师进行快速油藏性能评估的能力提出了很高的要求。考虑到这一动机，已经开发了一种基于非常规公式的快速储层模拟新方法。与通常具有基于压力的未知数的更常规方法相反，该配方具有基于通量的未知数。对于有用的条件范围，基于通量的未知数在整个油藏域中随时间变化很小或没有变化，从而可以快速模拟油藏中的流体运动。结合动态适应储层条件的迭代求解器，此公式已用于创建一个新的模拟器，称为FMF（用于基于流量的多相流）。 FMF算法包括严格的质量守恒方案，可在整个模拟过程中保持精确的物料平衡。使用模拟器对一系列案例进行了整体精度和计算效率的研究。这些研究基于与Eclipse的比较，所有计算都在一个通用平台上完成，以促进CPU时序研究。对于所考虑的情况，这些研究表明FMF算法比Eclipse快大约一个数量级，并且产生相似的结果。

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