论文部分内容阅读
利用钻井及地震资料，详细研究了辽河东部凹陷滩海地区东营组的准层序组和准层序特征，认为该地区东营组包含了陆相准层序的两种基本类型：湖相沉积体制准层序，由向上变粗的沉积序列组成；河流沉积体制准层序，在河流体系分布区为向上变细的正粒序，在泛滥盆地相分布区为向上变粗的反粒序。成因分析表明，东营组准层序的特征和形成受四级构造幕沉降作用控制，从沉积空间演化角度看，准层序边界是一个沉积空间突变面。通过分析沉降速率变化引起沉积空间演变的沉积响应特征，解释了两类准层序的形成过程，并建立了相应的准层序成因模式。提出的认识为陆相断陷盆地准层序划分和对比提供了新的理论依据
Based on the drilling and seismic data, the quasi-sequence and quasi-sequence characteristics of Dongying Formation in the Tanhai area of eastern Liaohe depression are studied in detail. It is concluded that the Dongying Formation in this area contains two basic types of continental facies sequence: the lacustrine sedimentary quasi-layer The sequence of the sedimentary system of the river sediments is a positive grain order that is upward thinning in the distribution area of the river system and a transgranular order that is thicker upwards in the phase distribution area of the flooding basin. Genetic analysis shows that the features and formation of quasi-sequence in Dongying Formation are controlled by the tectonic subsidence of four layers. From the perspective of sedimentary space evolution, the quasi-sequence boundary is a sudden surface of sedimentary space. By analyzing the sedimentary response characteristics of sedimentary space evolution caused by the variation of sedimentation rate, the formation process of two types of quasi - sequence is explained and the corresponding quasi - sequence genesis mode is established. The proposed understanding provides a new theoretical basis for the quasi-sequence division and comparison of continental rift basin