Architecture and exploration target areas of the Senegal Basin,West Africa  

作　　者：Naxin Tian Gaokui Wu Min Gao Yue Gong Dapeng Wang Zhipeng Liu 

机构地区：[1]SINOPEC Exploration and Production Research Institute,Beijing,102206,China

出　　处：《Energy Geoscience》2024年第4期174-186,共13页能源地球科学（英文）

基　　金：funded by the projects of the SINOPEC Science&Technology Department(P21043-3,P23181);the Basic Prospective Research Projects of SINOPEC,China(P22214-2,P22214-1).

摘　　要：The recent discovery of large oil and gas fields in the deep-water of the Senegal Basin has drawn global attention.Despite this,several exploration wells in this area fail,which can be primarily contributed to a lack of understanding of the basin's structures and hydrocarbon accumulation conditions.This study examines these characteristics utilizing gravity,seismic and drilling data,and finally makes a comparison with the Cote d’Ivoire Basin,a typical transform margin basin in the South Atlantic.The results suggest that the Senegal Basin,influenced by multiple transform faults and a weak Paleozoic basement,experienced three evolutionary stages:rifting,transitional,and drifting.Each stage contributed to the development of distinct depositional sequences-syn-rift sequences,sag sequences,and continental margin sequences,respectively.The Triassic-Early Jurassic rifting stage predominantly formed continental deposits,like fluvial,lacustrine,and deltaic deposits,in the syn-rift sequences.The Middle-Late Jurassic transitional stage,influenced by transform faults,witnessed the formation of marginal ridges or submarine uplift zones.These zones,in conjunction with landward high terrains,formed a restricted environment promoting the development of source rocks in the sag sequences.During the drifting stage,three types of reservoirs,namely platform carbonate rocks,deltas,and slope-floor fans were formed.Notably,large-scale hydrocarbon reservoirs have been found in the deltas and the slope-floor fans both in the Senegal Basin and the Cote d’Ivoire Basin.The Upper Jurassic-Aptian platforms exhibit thick carbonate rocks and organic reefs on their edges,suggesting substantial potential for hydrocarbon exploration in the Senegal Basin.

关 键 词：Transform-extensional passive continental margin Basin architecture Accumulation model Senegal Basin West Africa 

分 类 号：P618.13[天文地球—矿床学]