大庆油田北三东西块高含水期剩余油分布  

Residual oil distribution in high water cut period in west block of east region of Beisan area in Daqing Oilfield

作　　者：董仕贵[1] 毕研斌[2] 石红萍[1] 李景发 

机构地区：[1]大庆职业学院大庆油田技术培训中心,黑龙江大庆163255 [2]中国石化石油勘探开发研究院西北勘探研究中心,北京100083 [3]大庆职业学院继续教育培训部,黑龙江大庆163255

出　　处：《大庆石油学院学报》2011年第3期22-27,115,共6页Journal of Daqing Petroleum Institute

基　　金：黑龙江省自然科学基金重点项目(ZJG06061-02)

摘　　要：利用储层流动带指标,采用概率统计法对大庆油田北三区东部西块葡萄花油层岩石物理相进行分类,以不同岩石物理相的含油饱和度变化规律为指导,分析目的层的剩余油分布特征.结果表明:以高弯曲分流河道砂体沉积为主的水上分流平原相,平面上已大片水淹,剩余油主要分布在二线受效、废弃河道遮挡所造成的厚油层中上部低、未水淹型油层部位,是三次采油剩余油挖潜的主要对象.以低弯曲分流河道砂体和水下分流河道砂体发育为特征的沉积单元中,剩余油分布比较复杂,主要分布在二线受效和注采关系不完善形成的河道砂体中上部低、未水淹层段中,是三次加密剩余油挖潜的主要对象;河间砂和席状砂体油层水驱油效率较低,存在零散分布的剩余油,通过井网加密和综合调整,在一定程度上可进一步提高这类油层的动用程度和开发效果.The petrophysical facies of the pay zones are divided and described with reservoir flow zone index and probability statistics method for Putaohua formation in west block of east region of Beisan area in Daqing oilfield.Under the guidance of variation law on oil saturation,residual oil distribution characteristics are analyzed at target zones.The study shows that most of the above water distributary plain facies are widely flooded which is mainly deposited by high meandering distributary channel sands.Remaining oil is mainly distributed in the low or non-watered out reservoir in the mid and upper parts of thick oil layer,which is formed by affected as the secondary rank oil well and abandoned channel,and which is the main target of tertiary recovery.Remaining oil in the sedimentation unit characterized by low meander distributary channel sands and subsea distributary channel sands is mainly distributed in the mid and upper parts of channel sands,which is developed by affected as the secondary rank oil well and imperfect injection-and-production system,and this type of remaining oil is the main target of tertiary infilling.Residual oil is characterized by the scattered pattern in inter-stream sands and sheet sandstone as a result of lower displacement efficiency,and to a certain extent,the production effect for the type of layers will be further improved with infilling well pattern and comprehensive adjustment method.

关 键 词：河流三角洲 高含水期 岩石物理相 含油饱和度 剩余油分布 大庆油田 

分 类 号：TE122.1[石油与天然气工程—油气勘探]