塔河碳酸盐岩油藏产量递减特征与影响因素分析  

Analysis of production decline and influence factors in the carbonate reservoirs of Tahe oilfield

作　　者：刘常红[1] 陈志海[1] 

机构地区：[1]中石化石油勘探开发研究院,北京100191

出　　处：《特种油气藏》2010年第6期72-74,116,共4页Special Oil & Gas Reservoirs

基　　金：中石化项目"塔河油区开发动态跟踪与开发技术政策研究"(P03093)

摘　　要：塔河奥陶系缝洞型碳酸盐岩油气藏储层非均质性严重,储集体规模、类型和内部油水关系分布复杂,油井生产动态相对复杂。依据油井钻遇的缝洞储集体类型所划分的3类油井,利用产量"归一化"方法建立缝洞型油藏油井产量递减分析方法,分析了不同类型油井的产量递减特征,并对产量递减影响因素进行了分析。认为产量递减的主要原因是油井见水和天然能量不足;因地层压力下降造成采油指数低、油井工作制度的改变也是重要的影响因素。The Ordovician fracture-cavern carbonate reservoirs in the Tahe oilfield are characterized by severe heterogeneity,complicated reservoir bodies and types and oil-water relationships,and sophisticated oil well production performances.For the three types of oil wells classified by drilling encountered types of fracture-cavern reservoirs,an analysis method of production decline has been established by using production-normalized approach.The characteristics of production decline in different types of oil wells and their influence factors are analyzed.It is thought that the main reasons for production decline are water breakthrough and insufficient nature energy.In addition,formation pressure decline can result in low productivity index,and the change of flow regime can also be an important influence factor.

关 键 词：碳酸盐岩油藏 “归一化”方法 产量递减 影响因素 塔河油田 

分 类 号：TE33[石油与天然气工程—油气田开发工程]