摘要
以大庆萨北开发区PⅠ3沉积单元为研究对象,纵向上识别出2个超短期旋回层序,平面上划分出心滩坝和辫状河道,并精细描绘出内部夹层分布特征为水平产状、分布稳定性差,仅在小范围内零星分布,多呈孤立的土豆状或窄条带状。辫状河储层平面及层内非均质性中等。在后续水驱开发阶段,剩余油平面上主要存在于微构造高部位、注采不完善部位、辫状河道边部,纵向上主要存在于油层顶部、夹层遮挡部位。研究成果对一类油层聚驱后挖潜具有指导意义。
Taking Sedimentary Unit P 1 3 in Daqing Sabei Development Zone as the researching object, two super short-term cyclic sequences have been recognized vertically, the planar channel bars and braided channels are divided, and moreover the inside interlayer distribution characteristics are finely described as follows： horizontal occurrences and poorer distribution stability, these bars and channels are only distributed in a small range, which are isolated-potato shapes or narrow strips. The planar and interlayer heterogeneities of the braided-river reservoirs are medium. In the stage of the consequent waterflooding, the planar remained oil is mainly enriched in the high parts of the micro-structures, injection-production imperfect parts, edges of the braided channels; the longitudinally remained oil mainly exists on the top of the oil layers and interlayer shielded parts. The achievements possess a certain guiding significances for the later potential tapping of the first-class oil reservoirs after the polymer flooding.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2015年第4期73-77,共5页
Petroleum Geology & Oilfield Development in Daqing
基金
国家"十二五"重大专项(2011ZX05052003)
关键词
辫状河
心滩坝
构型
夹层
剩余油
braided river
channel/mid-channel bar
configuration
interlayer
remained oil
