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利用层序地层学研究方法 ,建立了沙河街组层序地层框架和目的层段层序地层框架 .将沙河街组地层划分为 3个层序 ,将主要含油层位s33～s23划分出 6个准层序 .依据目的层段层序地层框架 ,进行了层序地层对比 .分析了该区的沉积发展历史 ,建立了柳北地区沉积层序模式 ,进而阐明层序Ⅰ高水位体系域向柏各庄断层方向减薄是由准层序“合并”和层序Ⅱ与层序Ⅰ之间的层序界面在向柏各庄断层方向的不整合造成的
Using the method of sequence stratigraphy, the sequence stratigraphic framework of the Shahejie Formation and the sequence stratigraphic framework of the target interval are established.The strata of Shahejie Formation are divided into three sequences, and the main oil reservoirs s33 ~ s23 are divided into six Based on the stratigraphic framework of the target interval, stratigraphic stratigraphic correlation was carried out, the sedimentary development history of the area was analyzed, and the sedimentary sequence pattern of the northern Liubei area was established, The thinning of the Zhuang fault is caused by the unconformity of the “merger” of quasi-sequence and the sequence boundary between sequence Ⅱ and sequence Ⅰ in the direction of the fault of Baigezhuang