聚合物驱后二元复合驱油藏的层系调整——以孤东油田七区西为例  

Study on layer adjustment for surfactant-polymer flooding reservoirs after polymer flooding-case of Gudong west 7 area

作　　者：陆雪皎[1] 王友启[2] 魏翠华[3] 潘广明 郭兰磊[3] 元福卿[3] 

机构地区：[1]中国石油大学(华东)石油工程学院,山东青岛266580 [2]中国石化石油勘探开发研究院,北京100083 [3]中国石化胜利油田分公司地质科学研究院,山东东营257015 [4]中海油天津分公司,天津300452

出　　处：《油气地质与采收率》2014年第2期25-28,112-113,共4页Petroleum Geology and Recovery Efficiency

基　　金：国家科技重大专项"高温高盐油田化学驱提高采收率技术"(2011ZX05011-004)

摘　　要：胜利油区的聚合物驱后油藏剩余储量丰富,现有的层系井网已不能满足后续开发的要求,为了更好地通过细分层系达到提高采收率和增加经济效益的目的,以孤东油田七区西二元复合驱油藏为代表,利用油藏数值模拟方法对聚合物驱后二元复合驱油藏进行层系调整研究。以化学驱投资与成本构成分析为基础,依据动态经济评价方法,建立了一套适用于聚合物驱后二元复合驱油藏开发的层系调整界限图版;应用此图版结合熵权算法计算得到的油藏各小层非均质综合指数和聚类分析确定的最优化分割方案,筛选出满足要求的最优化分割方案。依此方法对孤东油田七区西聚合物驱后二元复合驱油藏进行层系调整,调整后效果显著,采收率提高了3.45%,财务净现值增加了174.6×104元。The Shengli oilfield has rich remaining reserves after polymer flooding,the existing layer series and well pattern are not well prepared for its subsequent development.In order to further improve oil recovery and increase economic efficiency by subdividing layerseries,this paper makes a study on layer adjustment for surfactant-polymer flooding reservoirs after polymer flooding in Gudong west 7area,by means of numerical reservoir simulation.On the basis of chemical flooding of investment and cost analysis,a set of layer adjust-ment limit plates proposed to surfactant-polymer flooding reservoirs after polymer flooding has been established with the dynamic eco-nomic evaluation methods.Combined with the non-homogeneity composite index of each layer calculated by the entropy weight algo-rithm and the optimal partitioning scheme determined by the cluster analysis,we screen out the optimal partitioning scheme to meet therequirements.Taking this method to make layer adjustment for surfactant-polymer flooding reservoirs after polymer flooding,the re-sults show that: after layer series adjustment,the recovery efficiency of Gudong west 7 area has increased by 3.45%,and the financialnet present value has in creased by 1.746million yuan.The effect of layer adjustment is remarkable.

关 键 词：聚合物驱后 二元复合驱 层系调整界限 熵权算法 最优化分割方案 孤东油田 

分 类 号：TE357.431[石油与天然气工程—油气田开发工程]