NB35-2油田组合调驱剂性能评价及其注入参数优化

Performance evaluation and optimization of injection parameters of NB35-2 Oilfield combination driver

针对渤海普通稠油油藏开发实际需求,开展了微界面驱油体系性能评价及其组合调驱参数优化研究。结果表明,根据现场现场注入压力,推荐调驱最佳聚铬比范围为120∶1~180∶1,聚合物浓度为3000~3500mg·L-1。在界面张力,乳化降粘和分水率方面,"药剂2"优于"药剂1"。弱凝胶多轮次调驱后,"强化调剖段塞+弱凝胶+微界面溶液"交替注入方式不仅有利于扩大波及体积,而且可以提高洗油效率,可以取得更好的增油降水效果,进一步提高采出程度。

According to the actual development requirement of common heavy oil reservoir in Bohai sea,the performance evaluation of micro-interface oil drive system and the optimization study of combined driving parameters were carried out.The results show that according to the field injection pressure,the optimal ratio range is 120∶1~180∶1 and the polymer concentration was 3000~3500 mg·L-1.In terms of interfacial tension,emulsifying viscosity reduction and watershed,"Pharmaceutical 2"is superior to"Pharmaceutical 1".After weak gel multiple rounds of regulation flooding,the"enhanced section plug+weak gel+micro-interface solution"alternating injection method is not only conducive to expanding the volume,but also can improve the oil washing efficiency,can achieve better oil increase precipitation effect,and further improve the degree of production.