陆相断陷湖盆中层序边界的形成机理及其识别特征研究  

Formation Mechanism and Identification Marks of Sequence Boundaries in Continental Fault Depression Basin

作　　者：张世奇[1] 肖焕钦[2] 

机构地区：[1]石油大学(华东)地球资源与信息学院,山东东营257061 [2]胜利油田有限公司地质科学研究院,山东东宫257000

出　　处：《江汉石油学院学报》2003年第1期4-7,共4页Journal of Jianghan Petroleum Institute

基　　金：国家重点基础研究发展规划项目(1999043304);中国石油天然气集团公司"九五"科技攻关项目(970206-450-01)

摘　　要：陆相断陷湖盆中层序边界是由于沉积物表面高出沉积基准面或盆地基准面、沉积物发生剥蚀或无沉积作用所形成的,其产生机理主要有边界断层停止活动、断块翘倾活动、湖盆整体抬升和湖平面下降。层序边界在地震特征上、测井曲线上、钻井剖面中的岩性、岩相特征、古生物组合、微量元素的变化上均有明显的特征。利用这些特征,在济阳坳陷下第三系中识别出9个三级层序。A sequence boundary of continental fault depression basin is formed because sedimentary surface is higher than depositional base level or lake basin base level, by which degradation of sediments and non-deposition are resulted. The cease of boundary fault movement , upwarping movement of fault block, uplift of whole lacustrine basin and fall of lake level are the mechanisms of sequence boundary formation. The sequence boundaries have obvious marks on seismic profile, log curves and lithologic character, lithofacies, palaeontologic combination, microelement changes on drilling profile. On the basis of these characters, nine 3rd grade sequences are identified in eogene of Jiyang Depression.

关 键 词：陆相断陷湖相盆地 层序边界 形成机理 识别 特征 研究 油气地质 

分 类 号：P539.2[天文地球—古生物学与地层学]