摘要
至2011年底,中国聚合物驱后的原油采出程度约为53%,聚合物驱后剩余油仍具有相当大的开采潜力,为使其得到有效开发,提出利用面积劈分——叠加法对聚合物驱后单井及整个区块的剩余油潜力分布进行预测。以大庆油区长垣北部典型聚合物驱油藏为例,研究了37口生产井的聚合物驱后剩余油分布规律。根据聚合物驱采出程度的变化,将聚合物驱后单井剩余油潜力划分为高、中、低3个等级;聚合物驱后剩余石油地质储量的平面分布表明,剩余油主要分布在区块主砂体带中井网控制程度弱的2大区域。
Until the end of 2011,oil recovery after polymer flooding is about 53% in China. Residual oil reserves after polymer flooding own pretty high exploitation potential. In order to extract the amount of remaining oil efficiently, it's necessary to study residual oil law and its potential distribution after polymer flooding. For that reason, area-split and superposition method has been put forward specifically, which can be utilized in forecast and studying on residual oil potential distribution of single well and whole reservoir after polymer flooding. Then, the key reservoir in the north of Daqing placanticline is selected as a typical object. After that, the residual oil distribution law of 37 wells after polymer flooding is studied respectively. Finally, based on the changes of recoverydegree, 3 levels of single well's residual oil potential have been divided after polymer flooding, which can be classified as high, medium and low. According to planar distribution of residual oil geological reserves, 2 enrichment areas after polymer flooding, which are mainly located in prime sand body and weak well pattern controlling parts, are pointed out as well. The research process and results can provide certain methodological and theoretical references on the forecasting of residual oil and the rational adjustment and potential tapping after polymer flooding.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2012年第5期57-60,114-115,共4页
Petroleum Geology and Recovery Efficiency
基金
国家重大技术装备研制和重大产业技术开发专项"改善高含水油田后期水驱效果技术开发和应用"(05-06专项课题)
中国石油天然气股份有限公司科学研究与技术开发项目"高含水提高采收率关键技术研究"(06-02A-01-02)
关键词
聚合物驱后
剩余油
分布规律
面积劈分-叠加法
采出程度
post-polymer flooding
residual oil
distribution law
area splitting and superposition
recovery degree
