High resolution sequence stratigraphic analysis of Qingyi section in Hei-258 area

In order to solve the problems of unclear division delta front pre facies belt first member Qing Dynasty in Hei-258 area Daqingzijing south Songliao Basin and lack a unified fine isochronous stratigraphic framework whole region, types genesis cycle interface are summarized by using core data coring well logging more than 70 wells, combined with theory high-resolution sequence stratigraphy sedimentology, Establish summarize control base level on sedimentary evolution. The results show that subfacies main Qinghe formation area, small amount deposits developed northeast study some periods. interfaces mainly Lake flooding surface different levels, conversion from progradation retrogradation or progradation, lithologic catastrophe interface, etc., short-term cycles classified into three categories according structural style. above understanding can provide theoretical basis for distribution range establishment area.