摘要
搞清聚驱后剩余油分布规律和剩余储量潜力是聚驱后进一步提高挖潜的关键。利用聚驱前后钻取的36口密闭取心井资料，研究了聚驱后剩余油的分布规律及剩余储量潜力。结果表明，聚驱后水洗厚度比例接近90％，驱油效率为53．2％，剩余油饱和度为40．9％；聚驱后74％的剩余地质储量主要分布在中强水洗段，是聚驱后挖潜的主要对象。对于厚油层顶部及薄差油层的剩余油可以通过井网井型优化进一步扩大波及体积来挖潜，对于中强水洗段的剩余油可以通过在扩大波及体积的基础上再提高驱油效率来挖潜。
It is a key to find out the distribution laws of the residual oil and the potential of remained reserves for further EOR tapping. The above studies are realized by making full use of the data of 36 pressure-coring wells pre and post polymer floodings. The results show that after polymer flooding the watered thickness percent is near 90% and oil displaced efficiency is 53.2% , the residual oil saturation is 40. 9% and 74% of remained OOIP are distributed in mid and strongly-watered intervals which are regarded as the main subjects for tapping. The residual oil in the upper part of thick layers, thin and bad layers can be tapped by optimizing well patterns and types to enhance swept volume; meanwhile, the residual oil in mid and strongly-watered intervals can be tapped by enhancing displacing efficiency on the basis of increasing swept volume.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2011年第5期125-129,共5页
Petroleum Geology & Oilfield Development in Daqing
基金
国家科技重大专项“大型油气田及煤层气开发”（2008ZX05010）资助.
关键词
聚驱后
剩余油
分布规律
剩余储量
潜力分析
after/post polymer flooding
residual oil
distribution laws
remained reserves
potential
