沙埝油田沙20东断块窄条状边水油藏有效注水模式  

Study on effective waterflooding development system of narrow strip reservoir with edge waterineast Sha 20 fault block of Shanian oilfield

作　　者：李涛[1] 姜汉桥[1] 肖康[1] 吕照明 糜利栋 

机构地区：[1]中国石油大学(北京)石油工程教育部重点实验室,北京102249 [2]中国石油大学(北京)油气资源与探测国家重点实验室,北京102249

出　　处：《油气地质与采收率》2014年第3期78-81,116,共4页Petroleum Geology and Recovery Efficiency

基　　金：国家科技重大专项"海外大陆边缘盆地勘探开发实用新技术研究"(2011ZX05030-005)

摘　　要：沙埝油田沙20东断块油藏是典型的窄条状边水油藏,整体含水率较高,局部井区水淹严重,导致油藏持续稳产较为困难,且剩余油分布复杂。应用多因素模糊综合评判方法以及电容模型原理,对区块水驱优势渗流通道进行识别,并对发生窜流的砂体及水窜方向进行了研究。结果表明,造成水驱优势渗流通道的原因包括注水井的持续注入和边水的长期水侵,在后续注水结构调整中,应以水驱优势渗流通道识别结果为基础,进行有效注水策略研究。结合储层平面及纵向剩余油分布特征,对储层进行封层、补孔、油井加密及油井转注等处理,并在此基础上,对发生不同程度窜流的区域进行注采系统优化调整。油藏采用最优方案开采15 a,采出程度提高了2.71%,且初期含水率下降了25%,提高和改善了窄条状油藏的水驱开发效果。The east Sha 20 reservoir in fault block of Shanian oilfield is one of the typical narrow strip reservoirs with edge water. Theoverall reservoir is of high water cut at 2012, and also flooded seriously in the well area, so it is difficult to maintain a stable productionin addition to the complex remaining oil distribution. By means of comprehensive evaluation method of multiple factors and the capaci-tance model principle, we can identify block water flooding channel, and study the sand body on fluid channeling and the direction ofit. Results show that the causes of water drive advantage channel include not only the continuous injection of injection wells of edge,but also the long-term water invasion of edge water, therefore, the effective water injection strategy research will be based on the advan-tage of water drive channel identification results. Combined with the planar characteristics of the reservoir and vertical remaining oildistribution, it is suitable to block layers, fill holes, infill and transfer oil wells on reservoir, and then adjust the injection-productionsystem in different fluid channeling regions. By adjusting the water injection mode, the recovery of optimal plan can increase by 2.71%for 15 years, and the initial water cut decreases by 25%, so we can enhance and improve water flooding development of the narrow stripof reservoir, therefore providing experience for similar oilfield exploitation andlateradjustment.

关 键 词：窄条状边水油藏 剩余油 注采系统 注水开发 高含水期 沙埝油田 

分 类 号：TE347[石油与天然气工程—油气田开发工程]