莺歌海盆地莺东斜坡黄流组轴向重力流水道沉积特征及控制因素  

Sedimentary characteristics and controlling factors of the axial gravity channel in Huangliu Formation of the Yingdong Slope Area in Yinggehai Basin

作　　者：陈杨 张道军 张建新 黄灿 焦祥燕 王亚辉 CHEN Yang;ZHANG Daojun;ZHANG Jianxin;HUANG Can;JIAO Xiangyan;WANG Yahui(Zhanjiang Branch of CNOOC(China),Zhanjiang,Guangdong 524057,China)

机构地区：[1]中海石油(中国)有限公司湛江分公司,广东湛江524057

出　　处：《东北石油大学学报》2020年第2期91-102,I0007,共13页Journal of Northeast Petroleum University

基　　金：国家科技重大专项(2016ZX05024-005)。

摘　　要：基于钻井、岩心、分析化验及三维地震资料,采用形态学、沉积学和层序地层学等方法,分析莺歌海盆地莺东斜坡黄流组轴向重力流水道的沉积特征及控制因素。结果表明:研究区水道具有典型的重力流沉积特征,水道充填分为三期,井区(交汇区)水道砂由垂直陆坡的东支水道近距离供应,水道砂岩自下而上具有正粒序发育的特征;水道形成和充填受区域海平面下降、充足近物源供应、径直发育的输砂通道和下伏的断裂破碎带四大因素耦合控制,其中下伏的断裂破碎带是控制水道发育的最主要因素。该结果对水道评价及盆地内其他水道体系研究具有指导意义。The sedimentary characteristics and controlling factors of the axial gravity channel in Huangliu Formation of the Yingdong Slope Area in Yinggehai Basin are studied by drillings,cores,granularity analysis and 3 Dseismic data.Based on morphology,sedimentology and sequence stratigraphic analyses,the results show that the channel has the obvious features of gravity flow,the filling of the channel has three parts structure,the source of channel sand in well area(intersection area)is mainly supplied by east branch waterway,and the channel sand shows normal grading from the channel bottom to top.The formation and filling of the gravity flow channel are coupled and controlled by four major factors:regional sea level descent,sufficient near-source supply,directly-developed undercut valleys and underlying fault fracture zones,and the underlying fault fracture zones is the most important factor.This study has guiding significance for the next evaluation in the channel and other channel systems in the basin.

关 键 词：莺歌海盆地 莺东斜坡 黄流组 轴向重力流水道 沉积特征 控制因素 

分 类 号：TE122.1[石油与天然气工程—油气勘探]