白云凹陷北坡下切谷—低位扇的地震-沉积特征  

Seismic-sedimentary Characteristics and Its Oil & Gas Exploration Significance of Incised Valley-lowstand Fan in Baiyun North Slop

作　　者：吕晓伟[1] 李少华[1] 张洁[1] 

机构地区：[1]长江大学油气资源与勘探技术教育部重点实验室,武汉430100

出　　处：《重庆科技学院学报（自然科学版）》2013年第2期27-30,34,共5页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

基　　金：国家"十二五"重大专项(2011ZX05023-002-007)

摘　　要：在新近系的高精度层序格架内,通过3D地震资料的精细解释和刻画,在NSQ1、NSQ9、NSQ12低位域中识别出下切谷—低位扇沉积体系,并分析其地震反射特征和沉积学特征。研究表明:下切谷在垂直物源方向的地震剖面上通常表现出顶平底凹、不对称的"U"字型地震反射特征,谷内中央位置内部主要表现为杂乱充填的沉积结构,向上表现出明显的上超或发散充填地震相特征;在平行物源的地震剖面上,其主要表现为斜交或前积反射特征。In the Neogene high precision sequence stratigraphic framework,through fine interpretation of 3D seismic data,and portrayed in NSQ1 NSQ9 NSQ12 low domain,it identifies incised valley-low fan depositional systems and their seismic reflection characteristics,and analyzes sedimentary characteristics.Research shows that incised valley in vertical source direction on the seismic section usually has the characteristics of ChuDing flat bottom concave,asymmetric ＂U＂ shaped seismic reflection.The central position covering internal mainly has the characteristics of mixed and disorderly filling sedimentary structure,upward shows onlap or divergent filling seismic facies.In the parallel source on seismic section,which mainly has the characteristics of oblique or progradation reflection.

关 键 词：下切谷 低位扇 层序地层学 白云凹陷 

分 类 号：P618[天文地球—矿床学]