【摘要】 为提高特低渗砂岩油藏渗吸采油驱油效率，开展了注入压力、注入量、注入次数、焖井时间等渗吸采油工艺参数及不同表面活性剂对渗吸采收率影响的水驱岩心实验。结果表明：水中加入FH-1表面活性剂能够有效提高动态渗吸采收率；渗吸采收率随注入压力增大而增大、随注入量增大而增大，但注入量超过1 PV后渗吸采收率不会增加，随注入次数增加而增大，但增幅逐渐减小；焖井时间48 h,渗吸采收率最大。按照根据室内模拟实验结果，结合其他区块施工经验优化的工艺参数，在SL-3区块开展了渗吸采油现场试验，经3个月现场实验取得了良好效果，平均日产油量提高19倍、日产液量提高2倍，综合含水降低58.8%。更多还原

【Abstract】 In order to improve the oil displacement efficiency of imbibition oil recovery in ultra-low permeability sandstone reservoirs, water flooding core experiments were carried out to study the effects of imbibition oil recovery process parameters such as injection pressure, injection volume, injection times, soaking time and different surfactants on imbibition oil recovery. The results show that the addition of FH-1 surfactant in water can effectively improve the dynamic imbibition recovery. The imbibition recovery rate increases with the increase of injection pressure and injection volume, but the recovery rate does not increase after the injection volume exceeds 1 PV, and increases with the increase of injection times, but the increase gradually decreases. The imbibition recovery rate is maximum when the soaking time is 48 h. According to the results of indoor simulation experiments, combined with the process parameters optimized by other block construction experience, the field test of imbibition oil recovery was carried out in SL-3 block. After three months of field experiments, the average daily oil production increased by 19 times, the daily liquid production increased by 2 times, and the comprehensive water cut decreased by 58.8%.更多还原