海洋地质前沿2026，Vol.42Issue(4)：54-62,9.DOI:10.16028/j.1009-2722.2025.079
南海东部深水重力流沉积模式与砂体沉积相
Specification of deep-water gravity flow sedimentation model and sandbody facies in the eastern South China Sea
摘要
Abstract
Deep-water gravity flow deposits in the eastern South China Sea host abundant oil and gas resources.Understanding the sedimentation model and sandbody facies can guide the efficient oil and gas development.Tak-ing A gas field in the northeast of Baiyun Depression as an example,based on drilling,logging,and high-resolu-tion seismic data,the sedimentary types and evolution models of gravity flow were specified,the sandbody facies and their superposition patterns were analyzed.Results show there are four types of gravity flow sedimentary mi-crofacies in A gas field:sliding-slumping,unconfined channels,overbank,and channelized lobes.The 7th Mem-ber of the early Miocene Zhujiang Formation(ZJ7)is dominated by channelized lobe deposits,and the 6th Mem-ber(ZJ6)is dominated by sliding-slumping deposits and multi-phase water channel-overbank deposits.The thick-ness of the single channel is 16-31 m,the width is 280-330 m,while the thickness of the single lobe is 16-22 m,the width is 400-650 m.The sandbody superposition patterns could be classified as discrete,superimposed and cut-superimposed types,and the superposition direction is mainly in horizontal,by which superimposed channels and lobes constitute the major reservoirs.A three-dimensional fine geological model depicting sedimentary facies and channel-lobe nesting was established,providing a support for the fine development of oil and gas resources in the study area.关键词
深水重力流/沉积模式/砂体构型/叠置样式/南海东部Key words
deep water gravity flow/sedimentary model/sandbody structure/superposition pattern/eastern South China Sea分类
海洋科学引用本文复制引用
马肖琳,杨志鹏,黄余金,王华,熊琪,杨娇,吴雪晴,纪甜甜,代云娇,李庆明..南海东部深水重力流沉积模式与砂体沉积相[J].海洋地质前沿,2026,42(4):54-62,9.基金项目
中海石油(中国)有限公司综合科研项目"深水砂岩油气田高效开发关键技术"(KJZH-2024-2201) （中国）
