海洋地质前沿2026，Vol.42Issue(1)：1-10,10.DOI:10.16028/j.1009-2722.2025.008
东非马任加盆地油气地质特征与区带评价
Hydrocarbon in the Majunga Basin in East Africa:geological characteristics and zonation evaluation
摘要
Abstract
In recent years,the continuous discovery of large gas fields along the East African continental margin has attracted widespread attention from oil companies in the world.The Majunga Basin,as one of the least ex-plored basins in the East African region,the outcomes of oil and gas exploration are few.Based on the internation-al commercial oil and gas field databases IHS and Tellus,we reviewed the oil and gas exploration history,region-al structural sedimentary evolution,and characteristics of the hydrocarbon accumulation elements of the basin.The research results indicate that the Majunga Basin is a Mesozoic-Cenozoic passive continental margin basin su-perimposed on the Late Paleozoic-Jurassic rift,having experienced three evolutionary stages:syn-rift,Madagas-car block breakup,and passive continental margin,forming a sedimentary sequence that transitions from terrestri-al in the east to marine in the west.To date,no commercial oil and gas discoveries have been made in the basin,and the potential hydrocarbon accumulation combinations include the Cretaceous structural-stratigraphic and Tri-assic-Jurassic Sakamena/Isalo Formation structural combinations.Using hydrocarbon-bearing zone evaluation methods commonly applied in China,five oil and gas prospective zones,including the western deepwater zone of the basin,have been delineated.The comprehensive evaluation showed that the western deepwater zone is the most favorable zone,and we recommended that the next step should strengthen the deployment of seismic work to confirm the location of favorable traps.关键词
东非/马任加盆地/被动大陆边缘/成藏要素/区带评价Key words
East Africa/Majunga Basin/passive continental margin/hydrocarbon accumulation elements/zone evaluation分类
海洋科学引用本文复制引用
裴红昌,秦雁群..东非马任加盆地油气地质特征与区带评价[J].海洋地质前沿,2026,42(1):1-10,10.基金项目
国家科技重大专项(2025ZD1403902) （2025ZD1403902）
中国石油天然气股份有限公司科技专项(2023ZZ0702,2023ZZ0703) （2023ZZ0702,2023ZZ0703）
