渤海南部海域中深层滩坝相储层沉积规律及定量预测研究

The Reservoir Sedimentary Regularity and Quantitative Prediction of Middle-deep Beach Bar,the Southern Bohai Water

滩坝砂岩油藏作为一种重要的岩性油藏类型,具有分布复杂、预测难度大的特点。以BZ34油田东营组J砂层为研究对象,在系统地岩心观察基础上,通过岩矿特征、沉积构造、测井相标志明确了其滩坝砂沉积特点。利用古地貌分析手段和地层切片技术进行有利砂体预测,古地貌恢复显示研究区为宽缓的斜坡带,形成大范围的滨浅湖环境,深湖区局限,有利于大规模滩坝砂体形成和分布。井上资料显示有利砂体多发于在古地貌高点。地层切片技术与古地貌预测的砂体有良好的对应关系,可信度较高。因此在古地貌的地质约束下,结合切片技术确定了潜力砂体的分布区。

The beach bar sandstone oil reservoir is an important type of lithologic reservoir, with the character of distributed complex and hard to predict. BZ34 Oilfield J sand E3d as research object, on the base of core data was taken, through the symbol of petrological-mineralogical characteristic, sedimentary structure and log facies confirm the beach bar sedimentary face. The analysis of ancient landform and stratigraphic slice help to predict the favorable sandbodies. The ancient landform analysis indicates that the research area is a relieved slope zone, and it lead to large-scale shore-shallow lacustrine sedimentary and limited deep lake, which is a favor for the beach bar, and it is proved by the well data that the high spot of the ancient landform benefits the sandbodies. The stratigraphic slice has a good corresponding relationship with the ancient landform, it is of reliability. With the constraints of ancient landform, the stratigraphic slice designate the potential sandbodies is combined.