Geoscience ›› 2016, Vol. 30 ›› Issue (6): 1303-1310.
• Engineering Geology and Environmental Geology • Previous Articles Next Articles
SUN Ziming
Online:
Published:
Abstract: Abstract: Lower CongoCongo Fan Basin, located in the western coast of Africa, is one of the world's oil and gas exploration priorities and hot spots in recent years. Being rich in oil and gas and having the giant remnant resource potential, it has long been drawn the great concern from many researchers, and a series of exploration and research work were made from the different aspects such as tectonic evolution, petroleum geology, hydrocarbon migration and accumulation, and resource potential, etc. However, the exploration density is not uniform as the basin covers onshore and offshore which includes shallow water, deep to ultradeepwater areas from east to west. Therefore, how to fully evaluate the oil and gas remnant resource potential of the basin will be a key factor to guide next exploration deployment in the basin. By the integrated analysis of tectonostratigraphic framework and basin evolution, it is pointed out that Lower CongoCongo Fan Basin is a composite petroliferous salt basin superimposed of the Congo Fan Basin on Lower Congo Basin. Taking petroleum geological elements, and features of hydrocarbon migration and accumulation into consideration, three petroleum exploration domains are identified from Lower Cretaceous to Cenozoic, which are the Cenozoic exploration domain related to structurallithologic traps, the postsalt Cretaceous exploration domain related to structural traps, and the presalt Cretaceous exploration domain related to the Early Cretaceous rift, respectively. The subdivision of the three exploration domains lays a sound foundation for systematically evaluating hydrocarbon potential according to the exploratory objectives. By integrated analysis of the petroleum exploration domains, it is pointed out that onshore to shallow water area in the eastern basin is favorable for the postsalt and the presalt Cretaceous exploration domains, and deep to ultradeep water area in the western basin is favorable for the Cenozoic structurallithologic traps exploration domain.
Key words: exploration domain, sedimentotectonic evolution, Lower CongoCongo Fan Basin, West Africa
CLC Number:
P618310
TE1212
SUN Ziming. Sedimentotectonic Evolution and Petroleum Exploration Domains of Lower CongoCongo Fan Basin [J]. Geoscience, 2016, 30(6): 1303-1310.
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