莺歌海盆地中央坳陷中新世海底扇识别及其形成控制因素  

Identification and controlling factors of submarine fan in Miocene in central depression zone in Yinggehai basin

作　　者：裴健翔 陈杨 郝德峰 张道军 何小胡 

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》2016年第5期46-54,共9页Journal of Northeast Petroleum University

基　　金：国家科技重大专项(2011ZX05025)

摘　　要：根据岩石矿物学特征、粒度分析、沉积构造及三维地震等资料,分析中新世莺歌海盆地中央坳陷海底扇的沉积特征及控制因素。结果表明:中新世中央坳陷海底扇主要发育水道砂、水道间、天然堤和浅海滩坝等微相,具有非典型鲍玛序列AB段;海底扇由内部分支水道频繁迁移摆动形成的多个朵叶体组成;与东方区海底扇相比,乐东区海底扇具有物源供应更充足、规模更大的优势。中新世中央坳陷海底扇沉积体系的发育主要受海平面升降、物源及古地貌的控制,可以作为该区下一步勘探的重点。The sedimentary characteristics and controlling factors of the Yinggehai basin of central depression in Miocene submarine fan were studied based on physical properties,granularity analysis,sedimentary structure and three-dimensional seismic data.The results are as follows:it mainly develops sedimentary microfacies of water channel,interchannel and natural levee for submarine fan in central depression zone in Miocene,and have peculiar characteristics of sedimentary facies of which it has no typical Baoma AB section.The submarine fan in the study area is formed by the frequent migration and swing of the branch channels.Compared with the Dongfang region,the Ledong submarine fans have more supply of source and scale.We think that the development of submarine fan sedimentary system in the study area is mainly controlled by the sea level fluctuation,the provenance and the palaeogeomorphology.The large submarine fan reservoirs in the Miocene period will still be the focus of further exploration in central depression of Yinggehai basin.

关 键 词：海底扇 控制因素 中央坳陷 中新统 莺歌海盆地 

分 类 号：TE121.3[石油与天然气工程—油气勘探]