西南石油大学学报（自然科学版）2016，Vol.38Issue(4)：56-62,7.DOI:10.11885/j.issn.1674-5086.2014.06.26.04
河口坝储层内部结构及对剩余油分布的影响
The Inner Architecture of Debouch Bar Reservoir and its Influence on Remaining Oil Distribution
摘要
Abstract
In order to reveal the inner structure of debouch bar reservoir,to enhance the accuracy of remaining oil description, and to guide reservoir development and adjustment,a typical debouch bar of delta front reservoir in the Es2−8 Formation of Shengtuo Oilfield was characterized by close spacing architectural analysis. The study shows that the depositional interfaces in debouch bar can be classified into 5 levels. The fifth level interface restricts the composite debouch bar,which is thick stable mudstone. The top boundary of the fifth level interface presents a nearly horizontal attitude,and the bottom boundary presents an S shape attitude. The fourth level interface restricts the single debouch bar,which is mainly the muddy or calcareous intercalation with inclined attitude in the slope break belt,and a nearly horizontal attitude in the lake floor plain. The S shape foreset configuration and the independent sand body in contemporaneous deposit are the essential architectural features of the single debouch bar. The third level interface restricts the accretion sand body in the single debouch bar,the attitude of which is oblique or parallel with the fourth level interface. There are two kinds of foreset configuration in the accretion sand body. S shape and oblique crossing shape. At the later stage of extra-high water cut,the inner structure of the debouch bar reservoir displays a very high efficiency control effect on remaining oil distribution. The ubiquitous S shape forest configuration controls the low saturation and homogeneous distribution of the remaining oil;the regional oblique crossing shape foreset configuration controls the differential distribution of the remaining oil,and the architecture of independent sand body in contemporaneous deposit controls the sectional enrichment of the remaining oil.关键词
河口坝/沉积界面/结构单元/前积结构/剩余油Key words
debouch bar/depositional interface/architecture unit/foreset configuration/remaining oil分类
能源科技引用本文复制引用
杨圣贤,严科..河口坝储层内部结构及对剩余油分布的影响[J].西南石油大学学报（自然科学版）,2016,38(4):56-62,7.基金项目
国家科技重大专项（2016ZX05011）；中国博士后科学基金资助项目（2012M511542）。 （）
