萨尔图油田北二西区密闭取心井水洗特征  

Waterflooding characteristics of sealed coring wells in Beierxi area of Saertu oilfield

作　　者：李伟强[1] 尹太举[1] 邓智浩 李峰[1] 周文[1] 高航[1] 

机构地区：[1]长江大学地球科学学院，湖北 武汉 430100

出　　处：《油气地质与采收率》2016年第1期101-106,共6页Petroleum Geology and Recovery Efficiency

基　　金：国家科技重大专项"剩余油分布综合预测与精细注采结构调整技术"(2011ZX05010-002-005);国家自然科学基金项目"叠覆式浅水三角洲形成机理及内部结构解剖"(41172106)和"浅水湖盆三角洲沉积调查与物理模拟"(41072087)

摘　　要：萨尔图油田目前处于高含水开发时期,认清剩余油分布状况是关键,而密闭取心井分析方法是认识剩余油分布的一个最直观、最可靠的方法。在储层细化的基础上,利用萨尔图油田北二西区4口密闭取心井水洗特征分析资料对主力区块总体水洗特征和不同储层水洗特征进行统计分析。结果表明,该区储层总体上处于中水洗状况,仍具有较大潜力;河道主体水洗程度较高,以中、强水洗为主,中、强水洗潜力主要分布在河道中部,弱、未水洗潜力主要分布在河道顶部;表内整体水洗程度中等,表外整体水洗程度很低,弱、未水洗潜力主要分布于薄层表内和孤立表外。分布状况表明潜力储层位于河道顶部、河道中部、薄层表内以及孤立表外,是下一步调整挖潜的对象。At present,Saertu oilfield is at high water cut stage and it is necessary to identify the distribution of its remaining oil. And analytical method of sealed coring well is the most intuitive and reliable one. Based on reservoir subdivision,the overall water-flooding characteristics of the main blocks and different reservoirs were analyzed according to the waterflooding characteristics of four new sealed coring wells drilled in Beierxi area of Saertu oilfield. The results show that the overall water-flooding characteristics of the reservoirs in this area are at medium degree,which indicates a great potential of the block. The water-flooding degree of the main part of channel sand is higher:primarily medium and strong. The medium and strong waterflooding mainly distributes in the middle of channel sand and the weak and non-waterflooding is on the top of channel sand. The overall water-flooding degree of the tabulated reservoir is medium and that of the untabulated reservoir is quite low. The weak and non-waterflooding distributes in the thin-layer tabulated reservoir and isolated untabulated reservoir. It indicates that the potential reservoirs mainly locate on the top of the channel sand,the middle of the channel sand,the thin-layer tabulated reservoir and isolated untabulated reservoir,which are the targets of adjustment and potential tapping in the future.

关 键 词：密闭取心井 水洗特征 剩余油 潜力分布 萨尔图油田 

分 类 号：TE341[石油与天然气工程—油气田开发工程]