安塞油田坪桥地区长6油层组储层沉积相研究

以岩心和测井分析资料为基础,通过对安塞油田坪桥地区长6油层组的泥岩颜色、岩性特征、粒度分布、沉积构造、生物化石及测井相分析的研究,确认该工区长6油层组为三角洲前缘亚相沉积,将其进一步划分为水下分流河道、河口坝、河道侧翼、分流间湾、水下天然堤、前缘席状砂6个微相。其中水下分流河道、河口坝、前缘席状砂等砂体都是油气聚集的有利地区。根据岩石学特征、沉积微相类型及特征,在综合考虑宏观沉积背景的基础上,建立了坪桥地区长6油层组不同时期的三角洲前缘亚相沉积模式,分别为指状砂体模式、朵状砂体模式、坨状砂体模式三种,为储层有利储集相带预测奠定了基础。

Study on Sedimentary Facies of Chang 6 Reservoir Group in Pingqiao Area,Ansai Oilfield

Based on the core and logging information,and through the research of mudstone's colors,lithology properties,granularity distribution,sedimentary structures,fossils and logging facies analysis on Chang 6 reservoir group in Pingqiao Area,Ansai oilfield,it is confirmed that the sedimentary environment here is delta front subfacies sedimentation.It was further divided into six microfacies including the underwater distributary channel,mouth bar, the river course flank,interdistributary bay,underwater natural le...