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应用数值模拟方法研究了毛管力、转抽井到断层的距离、孤立砂体厚度、交替次数等因素对水井转抽效果的影响,为挖掘低渗透油田剩余油潜力提供了理论依据.结果表明:转抽效果的主要影响因素是转抽井到断层的距离和孤立砂体有效厚度,水井合理的转注时机是注水后的4a左右时间,合理注采交替周期为4~5a,有效交替次数为2个注采交替周期.
The effects of capillary forces, the distance from the well to the fault, the thickness of the isolated sand body and the number of alternations on the pumping efficiency of the well were investigated by numerical simulation method, which provided a theoretical basis for excavating the potential of remaining oil in the low permeability oilfield. The results show that: The main factors affecting the pumping efficiency are the distance from the suction well to the fault and the effective thickness of the isolated sand body. The reasonable transfer time of the well is about 4 years after water injection, and the reasonable alternation period of injection and recovery is 4 ~ 5 a and the effective alternation frequency is 2 A note of mining alternate cycle.