扎尔则油田注烃气混相驱机理研究  

Mechanism study on hydrocarbon gas miscible flooding in Zarzaitine oilfield

作　　者：陈晓军[1] 史华[2] 成伟[3] 马立权 

机构地区：[1]中国石油大学(北京)石油工程学院,北京102249 [2]中国石化股份胜利油田分公司地质科学研究院,山东东营257015 [3]中国石化集团国际石油勘探开发有限公司,北京100029 [4]中国石油大庆石油管理局技术培训中心,黑龙江大庆163000

出　　处：《油气地质与采收率》2012年第3期74-77,116,共4页Petroleum Geology and Recovery Efficiency

摘　　要：混相驱技术作为油田开发后期提高原油采收率的重要手段之一,近年来已在世界范围内得到广泛应用。阿尔及利亚扎尔则油田开展了注烃气混相驱先导试验,实施效果良好,在水驱采收率为62.8%的基础上,提高采出程度8.9%,最终采收率达到71.7%,展现了高含水、高采出程度的开发状况下混相驱技术在该油田的应用前景。以油藏内部混相驱替特征分析及机理研究作为切入点,应用拟三元相图模拟了注烃气混相驱的驱替过程,探讨了影响混相驱替效果的关键因素。结合室内实验分析结果和先导试验矿场数据,从油藏特征演变、产出物物性特征分析、剩余油饱和度变化等方面深入分析混相驱替过程,全面认识混相驱替机理,正确评价混相驱的驱替效果,为油田实施混相驱技术的可行性决策提供理论支持。As one of the most important approaches to improve oil recovery in late term of oilfield exploitation,gas miscible flooding pilot test has been performed in Zarzaitine oilfield in Algeria,Africa,and encouraging results has been acquired.Base on the oil recovery 62.8%by waterflooding,improved recovery percent of reserves is 8.9%,and ultimate oil recovery is 71.7%,which shows the widest prospect of this kind of technique in this oil field with high oil recovery percent and high water cut.This paper focuses on the displacement process analysis and miscibility mechanism study,simulates the miscible flooding process by using pseudo-ternary phase diagram to discuss the key influencing factors for the miscibility.On this basis,combining with the laboratory test data and pilot test results,variation of reservoir condition,characteristic of production fluid and distribution of remained oil saturation have been analyzed to study miscible displacement mechanism,so as to correctly evaluate the results of miscible flooding.The research can offer theoretical support for feasibility decision of miscible gas flooding in this oil field.

关 键 词：注烃气混相驱 提高采收率 拟三元相图 混相特征 机理研究 扎尔则油田 

分 类 号：TE357.4[石油与天然气工程—油气田开发工程]