下二门油田剩余油主要分布在断层屋檐下、微构造高点和砂体上倾尖灭区等部位;微观上剩余油主要以斑块状、网络状等状态分布在小孔隙中。根据井网调整的相关经济技术界限研究,采取层系细分、井别转换、部署跨层系调整井等对下二门油田核三段进行井网优化,采收率由33.7%提高到37.5%,取得良好效果。 The remaining oil in the Xiaermen oil field is mainly distributed under the eaves of the fault, the micro-structure high point and the updip zone of the sand body, etc. The residual oil in the Xiaermen oil field mainly distributes in small pores in the form of plaque and network. According to the study of the economic and technological limits of the well adjustment, stratified subdivision, well diversion and deployment of cross-strata adjustment wells were carried out to optimize the well pattern of the third member of Xiaermen Oilfield. The recovery rate increased from 33.7% to 37.5 %, Achieved good results.