安塞油田塞160井区长6油层组沉积微相研究

Sedimentary Microfacies of the Chang-6 Reservoir in the Vicinity of Sai 160 Well

摘要: 为了确定安塞油田塞160井区长6油层组沉积微相展布特征,通过岩心观察、描述和实验分析,对研究区长6油层的沉积微相类型进行细化,对各小层沉积微相的平面展布进行研究。塞160井区长6为湖泊河控三角洲前缘亚相沉积,主要沉积微相为三角洲前缘水下分流河道、分流河口坝、水下分流间湾和前缘席状砂。研究区长6三角洲沉积体系代表了较完整的自旋回过程,长6₃沉积期,研究区的主体被向湖区方向推进的三角洲前缘水下分流河道占据;长6₂期,研究区主体仍为水下分流河道沉积,但延伸较长6₃近;长6₁²期维持与长6₂沉积模式;长6₁¹期三角洲前缘亚相发育完整,分流相带相互叠置。

Abstract: In order to confirm the sedim entary microfacies of Chang-6 reservoir in the vicinity of Sai 160 well,core observing and describing,experiment data analyzing,and observation of the distribution of microfacies were performed.The main sedimentary microfaces are distributary channel,the point bar,the inter-distributaries and sands.The delta deposits system of chang-6 reservoir stands for the complete process of gyration of itself.