Analysis on sedimentary facies of Permian section in Daxiakou outcrop, Xingshan County Hubei Province

Based on numerous researches, a conceptual analysis on sedimentary facies of Permian section in Daxiakou outcrop, Xingshan county is made. After a lot of field-survey, sedimentary facies of Daxikou Permian section was analyzed combining sedimentary facies analysis method with outcrop sequence stratigraphy, biostratigraphy,and reservoir diagenesis. It is considered that the Daxiakou Permian section could be divided into two depositional system units:carbonate ramp deposited in the lower part and carbonate platform deposited in the upper part. Meanwhile, the sedimentary facies models of the section were summarized in this paper. It's concluded that sea level eustacy is the main factor controlling the development and distribution of sedimentary facies in this region.