天然气勘探与开发2026，Vol.49Issue(5)：8-20,13.DOI:10.12055/gaskk.issn.1673-3177.20260010
莺歌海盆地黄流组重力流沉积主控因素及沉积模式
Key controlling factors and sedimentary models of gravity flow deposits in the Huangliu Formation,Yinggehai Basin
摘要
Abstract
Multiple large-and medium-sized gas fields dominated by large-scale gravity flow deposits have been discovered in Yinggehai Basin,with enormous potential for remaining natural gas resources,especially the Neogene Miocene Huangliu Formation,which is one of the key exploration intervals for oil and gas in the northern South China Sea.To provide a geological basis for predicting high-quality reservoirs and precisely exploring subtle lithological traps,this study systematically analyzed the key controlling factors,sedimentary evolution patterns,and development models of large-scale gravity flow depositional systems in the Huangliu Formation according to 2D and 3D seismic data.The following results are obtained.First,regional sea-level fall led to extensive denudation of the source area,providing the material source for the formation of large-scale gravity flow reservoirs.Second,topography and its dynamic evolution are the main factors controlling the development,distribution,and genetic types of gravity flows.Third,the sedimentary evolution of the Huangliu Formation can be divided into four stages(the low deposition period of the second member,the transgressive-high deposition period of the second member,the low deposition period of the first member,and the transgressive-deposition period of the first member),leading to the construction of a sea-level-provenance-paleogeomorphology ternary coupled gravity flow sedimentary model for the low deposition period.It is concluded that(ⅰ)the gravity flow depositional process of the Huangliu Formation is jointly influenced by sea-level changes,sediment supply,and paleogeomorphology.Differential subsidence within the basin and the migration of depocenters caused by the evolution of shelf/slope on the eastern and western flanks shaped the macro-paleogeomorphology,thus governing the overall distribution of the depositional systems;(ⅱ)episodic activity of strike-slip faults and diapirs controlled the development of axial channels and the migration of submarine fan lobes through continuous local micro-topographic adjustments;and(ⅲ)the large-scale western-provenance submarine fan reservoirs surrounding the diapirs in the Ledong area are substantial and possess favorable conditions for hydrocarbon accumulation and migration,making them promising zones for expanding natural gas exploration in the Huangliu Formation.关键词
重力流/沉积模式/主控因素/中新统黄流组/莺歌海盆地/天然气勘探/有利拓展区Key words
Gravity flow/Sedimentary model/Key controlling factor/Miocene Huangliu Formation/Yinggehai Basin/Natural gas exploration/Favorable expansion zone分类
能源科技引用本文复制引用
李彦丽,胡高伟,高梦天,陈杨,陈亚兵..莺歌海盆地黄流组重力流沉积主控因素及沉积模式[J].天然气勘探与开发,2026,49(5):8-20,13.基金项目
中海石油(中国)有限公司"万亿大气区"重大综合科研项目"南海西部近海大中型天然气田勘探潜力与突破方向"(编号:CCL2021HNFN0203). （中国）
