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Comparison of solution schemes for black oil reservoir simulations with unstructured grids

机译：非结构化网格的黑油藏模拟方案的比较

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摘要

This paper presents comparative results of the fully implicit, iterative IMPES, and sequential solution schemes for black oil reservoir simulations with unstructured grids. These schemes are verified and compared for field-scale models of both saturated and undersaturated reservoirs. The comparative results show that: (a) The fully implicit scheme is most stable and robust for both reservoirs, but has the highest memory and computational cost, (b) The sequential scheme takes much less memory and computational cost than the fully implicit scheme to reach the same precision for the undersaturated reservoirs, when the same iterative control parameters are used; however, for the saturated reservoirs, the sequential scheme must use stricter iterative control parameters to reach the same precision, (c) The iterative IMPES scheme is not a good choice for the black oil reservoir simulation.
机译：本文介绍了用于非结构化网格的黑油藏模拟的完全隐式，迭代IMPES和顺序求解方案的比较结果。对饱和和不饱和油藏的现场规模模型进行了验证和比较。比较结果表明：（a）对于两种储层，全隐式方案最稳定，最健壮，但具有最高的内存和计算成本；（b）与全隐式方案相比，顺序方案所需的内存和计算成本要低得多。当使用相同的迭代控制参数时，对于欠饱和储层达到相同的精度；但是，对于饱和油藏，顺序方案必须使用更严格的迭代控制参数才能达到相同的精度。（c）迭代IMPES方案对于黑油藏模拟不是一个好的选择。

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