Research on Distribution of Sedimentary Deposition of Shan 1 Formation in Southwest Ordos Basin

The method of macro and micro geological evidence of the unification of sedimentary facies analysis is used,from the regional sedimentary background of the core material,combined with a field geological section,logging data,lithologic features,sedimentary structure characteristics,the sedimentary characteristics of facies pattern of Shanxi Formation are analyzed.In the research area of Shanxi Formation,three Sedimentary facies,five parfacies and ten sedimentary facies are obtained,In addition,the sedimentary characteristics and evolution of sedimentary facies of single well,profile of sedimentary facies of the well and the plane are shown as the basis,the sedimentary theory is used as guidance to determine the research area of Shan 1 Section which has a gentle sloping with shallow meandering river-delta-lakes facies pattern.The research provides a geological foundation for later exploration.