Discovery of Fans in Melut Rift Basin,South Sudan and Its Petroleum Geological Significance
Received date: 2014-05-12
Revised date: 2014-08-01
Online published: 2015-01-10
Melut Basin is a rift basin formed under the control of central Africa shear zone,with the passive rift basin character in Cretaceous and active rift basin character in Tertiary.In the long exploration activity,braided river and braided delta are the main exploration targets.By integrating geological and geophysical methods,the study identified a series of fans in North Melut sub-basin,including Abyat fan delta in the east of the sub-basin and Ruman subaqueous fans in west of the sub-basin.The fans mainly formed in the initial passive rift stage of Melut Basin and developed in the Cretaceous source rock of Al Renk Formation and formations close to the source rocks,such as Galhak Formation and Al Gayger Formation,with good oil source and reservoir-caprock assemblage.The discovery of fans in Melut Basin proved that central Africa Rift Basins also can develop fan deltas and subaqueous fans with good accumulation conditions and potential in the initial passive rift stage just like active rift basins.The research further expands the exploration potential and space for central Africa Rift Basins.
Key words: South Sudan; Melut Basin; Passive Rift Basin; Subaqueous fan; Fan delta
SHI Zhong-sheng,WANG Tian-qi,FANG Le-hua,HE Wei-wei,BAI Jie,SU Yu-ping,PANG Wen-zhu . Discovery of Fans in Melut Rift Basin,South Sudan and Its Petroleum Geological Significance [J]. Natural Gas Geoscience, 2015 , 26(1) : 81 -89 . DOI: 10.11764/j.issn.1672-1926.2015.01.0081
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