海洋地质前沿2017，Vol.33Issue(12)：46-52,7.DOI:10.16028/j.1009-2722.2017.12006
东非坦桑尼亚盆地油气地质特征与勘探前景
PETROLEUM GEOLOGICAL CHARACTERISTICS AND EXPLORATION PROSPECTS IN TANZANIA BASIN, EAST AFRICA
摘要
Abstract
In recent years,a total of fourteen large and medium gas fields have been discovered in the Tanzania basin,along the East African coast,which makes Tanzania the focus of deepwater hydrocarbon exploration in the world.On the basis of regional geologic information and the previous researches,we made a brief summarization of the tectono-sedimentary evolution of the basin and the assemblage of petroleum systems in it.Prediction of exploration prospects is also made on the basic data.It is suggested that there occur three sets of source rocks in the basin,i.e.the Middle-Upper Jurassic restricted marine shale,Lower Cretaceous deltaic shale and Upper Cretaceous marine shale.The main reservoirs are consisting of the lower Cretaceous fluvial sandstone and Upper Cretaceous,Paleocene and Oligocene deep channel sandstone with the Middle Jurassic sandstone and limestone as potential reservoirs.In the basin,the Jurassic-Neogene shale and clay deposits occur as excellent regional and interlayer seals.The gas pools are dominated by structural traps both onshore and offshore,and in deep-water they are dominated by structural and stratigraphic traps.Further exploration targets should be put on the slope fans and submarine fans formed by gravity current and channel filling sediments since Cretaceous.关键词
坦桑尼亚盆地/构造沉积演化特征/油气地质特征/勘探前景/深水区Key words
Tanzania Basin/tectono-sedimentary evolution characteristics/petroleum geological characteristics/exploration prospect/deep water area分类
海洋科学引用本文复制引用
汪立,屈红军,张功成,赵冲..东非坦桑尼亚盆地油气地质特征与勘探前景[J].海洋地质前沿,2017,33(12):46-52,7.基金项目
国家科技重大专项“南海深水区大油气田成藏条件与世界深水区成藏主控因素类比分析”(2016ZX05026007) （2016ZX05026007）
