基于沉积底形分析的东海X凹陷古水系研究  

Palehydrological study of the X Sag of East China Sea based on sedimentary bottom shape analysis

作　　者：鞠颢 程超 余逸凡 陈波 JU Hao;CHENG Chao;YU Yifan;CHEN Bo(CNOOC(China)Limited,Shanghai Branch,Shanghai 200335,China)

机构地区：[1]中海石油(中国)有限公司上海分公司,上海200335

出　　处：《复杂油气藏》2023年第4期380-386,483,共8页Complex Hydrocarbon Reservoirs

基　　金：中海石油(中国)有限公司科技项目(CNOOCKJ135ZDXM39SH03)。

摘　　要：通过沉积动力学,层序地层学和地震沉积学理论及相关研究综合分析,将微观尺度沉积现象与宏观尺度古地貌恢复有效结合形成沉积底形研究方法,以三维地震资料重点解释了顶平底凹和底平顶凸型的沉积底形,并分析了古水系展布规律和砂体形成机制。在东海X凹陷花港组H5层古水系研究中运用了此改进后的方法,分析了同一层位由于地理位置的不同,沉积体系、古水系分布、砂体富集规律的差异。验证了基于沉积底形分析方法古水系研究的准确性和有效性。Through comprehensive analysis of sedimentary dynamics,sequence stratigraphy,seismic sedimentology theories,and related studies,a method of sedimentary baseform research was formed by effectively combining the micro-scale sedimentary phenomena and macro-scale paleomorphological restoration.Three-dimensional seismic data mainly explained the sedimentary bottom shapes of the top-flat-bottom-concave and the bottom-flat-top-convex,and the paleo-water distribution law and the formation mechanism of sand body were analyzed.The improved method was applied in the study of the H5 paleowater system of the Huagang Formation in the X Sag of the East China Sea,and the differences in the sedimentary system,paleowater system distribution,and sand body enrichment pattern of the same layer were analyzed due to the differences in geographical location.The accuracy and validity of the method of palehydrological study based on sedimentary bottom shape analysis are verified.

关 键 词：古地貌 古水系 沉积底形 层序地层学 地震沉积学 

分 类 号：TE122[石油与天然气工程—油气勘探]