The sweep efficiency and oil displacement effect of polymer flooding in seven spot and five spot patterns for single and multizone reservoirs were simulated by numerical simulation.

用数值模拟研究手段对七点法井网、五点法井网以及单油层、多油层聚合物驱的波及系数及驱油效果进行了模拟；

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Two of the flooding-related deaths happened at the same spot in Indiana, while one happened in Missouri.

WSJ: Midwest Cities Fight Off Floodwaters