辽中凹陷东营组沉积期等时地层格架内部地震相研究  

Study on Internal Seismic Facies of Sedimentary Isochronous Stratigraphic Framework of Dongying Formation in Liaozhong Depression

作　　者：连旭欢 夏世强 姜瑞海 李慧敏 陈凯 李齐祥 

机构地区：[1]华北理工大学矿业工程学院,河北 唐山

出　　处：《地球科学前沿（汉斯）》2023年第4期394-404,共11页Advances in Geosciences

摘　　要：根据地震反射特征,辽中凹陷三级层序Sqd2可进一步划分为两个四级层序分别为d2x1和d2x2,对地震剖面进行精细划分,识别出了扇三角洲、浊积扇、辫状河三角洲等地震沉积相,并利用属性分析技术识别沉积体边界,进而分析沉积相的平面展布特征,发现沉积相展布特征受多种因素影响,其中水系物源、古地貌特征、相对湖平面变化及古气候对沉积相的展布占主要影响。According to the seismic reflection characteristics, the third-order sequence Sqd2 in Liaozhong depression can be further divided into two fourth-order sequences, d2x1 and d2x2, respectively. The seismic profile is finely divided, and seismic sedimentary facies such as fan delta, turbidite fan, braided river delta are identified. The boundary of sedimentary body is identified by attribute analysis technology, and then the plane distribution characteristics of sedimentary facies are analyzed. The distribution characteristics of sedimentary facies are found to be affected by many factors, among them, water sources, the characteristics of ancient land forms, relative lake level changes, and ancient climate mainly affect the distribution of sedimentary facies.

关 键 词：辽中凹陷 Sqd2层序 地震沉积相 湖底扇 三角洲 

分 类 号：P61[天文地球—矿床学]