Genesis and distribution of Cretaceous salt structures in North Gabon Subbasin

Abstract

Abstract: The North Gabon Subbasin is a composite basin with rift basin and passive continental margin basin superimposed, where a large number of salt structures are developed. Based on the distribution pattern of salt structures in seismic profiles, it is considered that the study area has very thick salt rocks deposited in the Lower Cretaceous Ezanga Formation, and multiple salt structures such as turtleback structure, wedge-shaped diaper and large diaper. Different types of salt structures correspond to different formation stress environments. Based on the distribution regularity of discovered oil and gas reservoirs, it is indicated that the presalt anticline related to salt structure and the lithological traps formed due to turbidite sealing on mudstone control hydrocarbon enrichment.

Key words: salt structure, oil and gas pool, Cretaceous, Gabon, coastal basin

Xu Rui, Ao Lide. Genesis and distribution of Cretaceous salt structures in North Gabon Subbasin[J]. China Petroleum Exploration, 2016, 21(5): 70-74.

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