海洋地质前沿2024，Vol.40Issue(10)：39-48,10.DOI:10.16028/j.1009-2722.2024.080
西湖凹陷中北部花港组上段浅水辫状河三角洲发育特征
Shallow braided river delta in the upper Huagang Formation in the central-northern part of Xihu Sag,East China Sea Basin
摘要
Abstract
The sedimentary facies of H4 and H5 sand groups of the upper part of Huagang Formation in the cent-ral and northern Xihu Sag of the East China Sea Basin were redefined based on the analysis of core data and sand body distribution.New understanding is obtained that shallow water braided river delta was developed in the study area,showing large-scale sand bodies formed in the central and southern parts of the study area.Results suggest that:The western and eastern flanks of the study area are dominated by braided river delta plain facies,with a small area that dominated by braided river delta front facies.In the central and central-southern parts of the study area,the braided river delta plain and delta front were developed,which is mainly characterized by the inter-layer sediments of delta plain and delta front in a short interval.In the dry season,delta plain sediments developed in most of the area,and delta front sediments developed in the southern margin.In the flooding season,delta front sediments and a small amount of shallow lake sediments were developed.Under the guidance of the shallow braided river delta sedimentary model,a number of delta channel sand bodies and mouth bar sand bodies were re-cognized.This area is potential for oil and gas exploration,which has been confirmed by the latest exploration wells.关键词
东海盆地/西湖凹陷/浅水辫状河三角洲沉积/花港组/砂体展布Key words
East China Sea Basin/Xihu Sag/shallow braided river delta/Huagang Formation/sand body distri-bution分类
天文与地球科学引用本文复制引用
陈春峰,徐东浩,张银国,唐贤君,万延周,冯桢鸣,何新建,俞伟哲..西湖凹陷中北部花港组上段浅水辫状河三角洲发育特征[J].海洋地质前沿,2024,40(10):39-48,10.基金项目
中海石油(中国)有限公司综合科技项目"西湖凹陷构造运动对大型圈闭发育和大规模油气运聚的控制"(KJZH-2023-2103) （中国）
