苏北盆地码头庄油田阜一段、阜二段湖泊—三角洲沉积模型

通过分析各种沉积体的岩性、结构、沉积构造、沉积序列和电性特征，划分了苏北盆地码头庄油田阜一段、阜二段沉积相；根据滩和坝在剖面、平面以及岩性上所呈现的特征，划分了滩和坝的类型,建立了各种相的沉积模式，分析了沉积模型的演化历史。据此指出：阜一段发育三角洲前缘亚相沉积，至下而上发育前缘席状砂、河口坝、水下分流河道、水下分流间湾和水下天然堤微相，呈现出三角洲进积的特点，三角洲前缘亚相在阜一段沉积末期消失；阜二段发育滨浅湖亚相沉积，分为生物滩、鲕粒滩、灰质滩、浅湖砂坝和滨浅湖泥微相，有开阔浅湖砂坝和水下隆起区碳酸盐岩滩2种沉积模式。

The Lacustrine-deltaic Sedimentary Model of Fu1 andFu2 Member in Matouzhuang Oilfield,Subei Basin

By studying the lithology, structure, sedimentary structure, sedimentary sequence, and character of electrical property of the lithosomic body, the sedimentary facies of Fu1 and Fu2 Member in Matouzhuang oilfield are classified. The sedimentary models of all facies are established, and the evolution of them is analyzed. There are delta front intrafacies in Fu1 Member, and frontal sand sheet, mouth bar, distributary channel under water, bay between distributary channels under water, and natural levee under water occur from bottom to top. It is characteristic of progradation of delta. Delta front intrafacies vanishes at the end of the sedimentation of Fu1 member. There are offshore\|shallow lacustrine intrafacies in Fu2 Member, including the subdivided facies of organic beach, oolitic beach, calcareous beach, sandy bar in shallow lake, and mud in offshore\|shallow lake. Classifying the type of carbonatite beach by lithology makes its name simple and concrete. In Fu2 Member, there are two sedimentary models of wide shallow lake sand bar and carbonatite beach in uplifted area underwater.