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聚合物驱后提高采收率技术研究
赵福麟,王业飞,戴彩丽,任熵,焦翠
(中国石油大学石油工程学院,山东东营257061)
摘要:
根据聚合物驱和聚合物驱后存在的问题,提出了聚合物驱后地层残留聚合物的再利用、深部调剖、高效洗油3 项提高采收率技术。地层残留聚合物的再利用技术由絮凝技术和固定技术组成,利用地层残留聚合物封堵高渗透 层,提高水驱的波及系数;深部调剖技术对残留聚合物再利用后的地层进行补充调剖,进一步提高水驱的波及系数; 高效洗油技术既弥补了聚合物驱机理的不足,也弥补了聚合物不可人孔隙体积所损失的那部分波及系数。地层残 留聚合物再利用的矿场试验效果证实了该技术对注聚油田的适应性和可行性。
关键词:  聚合物驱  提高采收率  深部调剖  驱油  矿场试验
DOI:
分类号:
基金项目:中国石油化工股份有限公司2003年先导试验项目
Techniques of enhanced oil recovery after polymer flooding
ZHAO Fu-lin,WANG Ye-fei, DAI Cai-li, REN Shang, JIAO Cui
(College of Petroleum Engineering in China University of Petroleum , Dongying 257061, China )
Abstract:
According to the problems during and after polymer flooding, the techniques of enhanced oil recovery(EOR) after polymer flooding including the reuse technique of residual polymer in formation, the deep profile control technique and the high efficiency oil displacement technique were put forward. The reuse technique of residual polymer in formation includes the flocculating technique and the fixing technique, which uses the residual polymer to shutoff the high permeability formation, and the sweep efficiency of water flooding is enhanced. The deep profile control technique supplies profile control after reuse of residual polymer and further increases the sweep efficiency of water flooding. The high efficiency oil displacement technique supplies the inadequacy of mechanism of polymer flooding and the sweep efficiency lost by the volume of inaccessible pore of polymer. The pilot test results confirm that the techniques of EOR after polymer flooding are adaptable and feasible.
Key words:  polymer flooding  enhanced oil recovery  deep profile control  oil displacement  pilot test
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