文38断块沙三上亚段沉积微相展布特征及剩余油挖潜措施

Distribution of Sedimentary Microfacies and Remaining Oil Development Measures of the Upper Submember of Es3 for Wen38 Fault Block

文38断块油藏属典型的复杂断块油藏,其沙三上亚段的沉积微相特征尚未得到充分认识,剩余油挖潜难度较大。为了深入挖潜增效,通过泥岩颜色、粒度特征、构造特征等综合分析,进行沉积相展布特征研究。通过沉积微相的精细刻画,明确了各小层河道砂体的平面及剖面展布规律;同时,结合各微相的韵律性特征,剖析了剩余油富集的有利部位;最后,提出了侧钻挖掘的剩余油挖潜措施。

Wen38 block is a typical complex - fault - block reservoir. Lacking of knowledge for sedimentary micro- facies characteristics constrained remaining oil utilization in the upper submember of Es3. In order to realize further exploitation, this article analyzed the color of mudstone of target zone, fineness of grain size, rock type and combi- nation characteristics to comprehensively study the deposition facies. After precise depiction of sedimentary micro - facies, we figured out plane and profile distribution character of fluvial channel of different layers. According to rhythmicity of each micro - face, we analyzed the possible positions for remaining oil accumulation and proposed that sidetracking and flooding control would be pertinent method.