Abstract：Middle Upper Ordovician is one of the main target for oil/gas exploration in Tazhong area.Through interpreting a large amount of 2 D and 3 D seismic data,the authors discovered that a special seismic facies widely distributed in Middle Upper Ordovician,Tazhong area.The facies has large depositional thickness,showing colina shape,desultory interior reflections and extension along major structural alignment on seismic section.Combining with bore hole information,the authors considered that the facies is composed of carbonate reef and beach facies developed in different stages on carbonate platform,which mainly distributes in margin of the platform,facing on sea,or relatively convex parts in palaeo geomorphology inside platform.The practice of exploration and development proved that it is favorable zone for oil/gas accumulation,so we map their distribution,from which we can see that they mainly distrbuted on Tazhong fault belt,well Tazhong No.1 structural belt and Tanan structural belt.The study has important guide meaning for oil/gas exploration in Tazhong area.
李洪革, 韩宇春. 塔中地区中上奥陶统有利油气富集的地震相特征及分布[J]. 石油地球物理勘探, 2003, 38(2): 194-198.
Li Hongge, Han Yuchun. Character and distribution of seismic facies favorable for oil/gas accumulation in Middle-Upper Ordovician,Tazhong area. OGP, 2003, 38(2): 194-198.
