歧北凹陷沙河街组层序地层学研究

Sequence Stratigraphy of Shahejie Formation in Qibei Seg

本文从地震、古生物、沉积和测井等多方面的资料入手，用层序地层学方法研究了黄骅坳陷歧北凹陷沙河街组的地层层序，将其划分为两个大层序，即层序Ⅰ（沙三段）和层序Ⅱ（沙二、沙一段）。在每个层序中，又进一步划分出低位、湖进和高位三个体系域，总结了各个体系域的特征，进而指出有利的油气聚集相带和地段。

Based on seismic,palaeontological, sedimentary and logging data, strata frequency of Shahejie formation in Qibei seg, Huanghua depression was studied by means of sequence stratigraphy,and the formation was divided into two sequences,Ⅰ(3rd member of the formation and Ⅱ(2nd and 1st members of the formation). Each sequence was further divided into three system tracts, low stand, transgressive and high stand system tracts. The characteristics of the system tracts were described in detail, and prospective factes tracts and zones for oil/gas accumulation in the seg were pointed out in the paper.