乌尔逊凹陷南部白垩系大磨拐河组层序地层特征与油气勘探远景

通过综合分析地震、测井和钻井等资料,对乌尔逊凹陷南部地区大磨拐河组进行了层序分析,识别出二级层序界面,首次湖泛面,最大湖泛面,分析了层序内三个体系域——低水位体系域、水进体系域和高水位体系域特征。在层序地层单元划分和对比的基础上,结合不同体系域的沉积体系分析,建立了该区的层序地层学模式,研究了油气分布特点,在有利的构造配合下,指出了工区发育的四种油气藏类型。

Sequence Stratigraphic Characteristics and Hydrocarbon Prospect of the Cretaceous Damoguaihe Formation in the Southern Wuerxun Sag

On the basis of analysis of the data of seismic,well-log and drilling core data,this paper analyzed the sequence stratigraphy of the Damoguaihe Formation in the south of Wuerxun Sag area. Second-order sequence boundaries,first flooding surfaces and maximum flooding surfaces are identified. We studied the set of type sequence,which includes lowstand system tracts,transgressive system tracts and highstand system tracts. On the basis of the identification and correlation of stratigraphic unit,the sequence stra...