Sedimentary facies analysis of S1-2 sand set of Shawan formation of Chunguang block in Zhungaer basin

Based on the sequence level method and the synthetic seismogram calibration to establish the sequence stratigraphic framework, then combined with the characteristics of seismic profiles reflection and drilling data to identify sedimentary facies, and shows that the area belongs to the braided river delta-lacustrine facies sedimentary system. S1-2 sand set is divided into braided river delta plain, braided river delta front and braided river delta, lakeside and shallow lake subfacies.And we can get the horizontal plan of sedimentary facies with sand body scanning solutions, which is conducive to points out the favorable reservoir facies belt.