二元复合驱注入参数优化实验研究

Experimental study of injection parameters optimization of surfactant/polymer flooding

新型无碱二元复合驱油体系现已成为三次采油技术研究的新方向。针对辽河油田锦16块综合含水率高、开发难度大、水驱经济效益差等问题,利用现代物理模拟和理论分析等方法,在前期聚合物和表面活性剂筛选及其二元复合体系和三元复合体系性能评价的基础上,对优选出的二元复合驱油体系增油效果进行物理模拟研究,并对二元驱油体系注入参数进行优化。推荐二元复合体系配方组成为聚合物(cP=1400～1600mg/L)+表面活性剂(cS=0.20%～0.30%)。

Surfactant/polymer (S/P) flooding system without alkali has become a new trend in the research of tertiary recovery technology. The Jin 16 block of the Liaohe oilfield has problems of high water cut,difficult to develop,and poor water flooding effect. This paper studies the oil increment effect of the S/P system and optimizes the injection parameters through physical modeling based on earlier screening of surfactants and polymers as well as performance evaluation of the S/P and A/S/P systems. The recommended formula of S/P compound system is polymer (cP=1 400～1 600 mg/L) + surfactant (cS=0.20%～0.30%).