【摘要】 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.更多还原

【Abstract】 The effect of capillary force, the distance of converted an injection well to a fault, the thickness of single sandstone body, and alternating production times upon the result of converted injection well are studied through numerical simulation, providing theoretical base for tapping the potentiality of residual oil in low permeability oilfields. The results show that the main influence factors are the distance of a converted injection well to a fault and the effective thickness of single sandstone. The reasonable timing for converting injection well is 4 years after water flooding, the reasonable injection-production cycle is 4～5 years, the effective alternating cycle is two injection-production cycles.更多还原