范庄油田阜宁组沉积体系及砂体建筑结构分析

受晚白垩世仪征运动和新生代喜马拉雅期吴堡运动的影响,金湖凹陷晚白垩世开始拉张断陷,沉积基准面上升,从而形成了比较完整的范庄退积型三角洲-滨浅湖沉积体系.生物碎屑灰岩、滩坝和分流河口砂坝位于沉积序列的上部,厚度大,物性好,紧靠深湖生油岩,是最有利的储集层.依据层次分析法,在沉积体系内,细分出10种建筑结构单元,平面上有二种接触关系,剖面上有三种拼合形式.

Analysis on Sedimentary System and Reservoir Architecture of Delta- Shallow Lake Facies of Fanzhuang in Jinhu Depression

Because of Yizheng orogeny in Late Cretaceous and Wubao orogeny during Himalayan movemenent of Cenozoic era, deltashallow lake facies system in Fanzhuang was deposited by rifting and rise of sedimentary base level in Jinhu depression. Because of biotic clastic limestone, beach bar and distributary mouth bar with thick sand and better physical property, which lies on the top of sedimentary layers, and being close to oil source rock, they are the beneficial reservoirs. By hierarchy analysis, ten types of architecture elements have been recognized in deltashallow lake facies system. On the horizontal section, there are two models of architectural elements stacked form. On the vertical section,there are three models of architectural elements stacked form.