论文部分内容阅读
沉积密集段作为层序地层学理论中的一个重要概念，它控制着盆地生油岩层的分布和厚度。为了更好地研究生储盖组合关系，预测隐蔽油气藏，利用层序地层分析的基本原理和方法，对惠民凹陷进行了层序地层学研究，将其下第三系沙河街组二、三、四亚段划分为３种层序类型，确定出断陷初期型、强断陷期型和断陷后期型３种类型沉积密集段，每一层序又可进一步划分成低水位体系域（ＬＳＴ）、湖侵体系域（ＴＳＴ）、高水位体系域（ＨＳＴ）和下降体系域（ＦＳＳＴ）。不同类型的沉积密集段可控制着不同的生油岩层的厚度和油气资源储量
As an important concept in the theory of sequence stratigraphy, the intensive sedimentary section controls the distribution and thickness of the source rocks in the basin. In order to better study the relationship between reservoir and cover, predict the subtle reservoirs and make use of the basic principles and methods of sequence stratigraphy analysis to study the sequence stratigraphy of the Huimin Depression, , The four sub-segments are divided into three types of sequence types, and three types of sedimentary-intensive segments are identified as initial fault type, strong fault depression type and late fault depression type, and each sequence can be further divided into low-level system tract LST, TST, HST and FSST. Different types of sedimentary-intensive sections control the thickness and hydrocarbon reserves of different oil-bearing formations