Study on sequence stratigraphy and depositional system in gentle slope of sag lake basin——Taking Luxi area in Junggar Basin as an example

Study on lake basin sequence strata with the type of sag gentle slope is not mature and perfect,so based on cores,well logging and seismic data,by applying sequence stratigraphic theory and method,four III grades strata are determined and strata comparative framework is set up,and meanwhile depositional system study is developed in isochronal sequence strata framework.On the basis of various data analysis and study,packing characteristics for lake basin with the type of sag gentle slope are summarized.At last,based on the theory of sequence stratigraphy,K-SQ1 uplift hemicycle,J-SQ3 uplift hemicycle and J-SQ5 uplift hemicycle depositional formations are favorable intervals.Jidong nose,Shixi bugle and 3 fountain bugles are advantageous parts for lithostratigraphy reservoir developing.