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Environmental Earth Sciences

, 78:638 | Cite as

Regional chronostratigraphic framework of sediments build-up in the Benin Basin: a guide for hydrocarbon prospecting

  • Peter S. OlaEmail author
  • Solomon O. Olabode
Original Article
  • 34 Downloads

Abstract

An attempt to understand the structural and sedimentation framework in the Benin Basin is made herein. Unlike in its contiguous basins in the Gulf of Guinea Province, no significant oil and gas discovery has been reported in the basin. The aim here is to provide a chronostratigraphic framework of sediments build-up as a guide to hydrocarbon prospectivity in the basin. Existing biostratigraphic and sedimentologic data as well as few proprietary reports were integrated to establish a chronostratigraphic correlation in six directions within the Nigerian portion of the Benin Basin. Isopach maps of the chronostratigraphic subdivision of the sequences in the basin were also made. Sedimentation in restricted grabens started in the western part of the basin. Only Ise-2 well penetrated the oldest Cretaceous (Neocomian to Albian) sediments in the area of study with a thickness reaching up to 869 m. During the Miocene the focus of sedimentation predominantly shifted towards the offshore in the basin. Significantly a missing Eocene/Oligocene section was observed both on the seismic section and the stratigraphic record of the basin. Only Epiya-1 shows gas occurrence in the Miocene. Based on this work and locations of hydrocarbons recovery in the other part of the basin, exploration effort should target the Cretaceous sediments in the Nigerian portion of the basin.

Keywords

Benin Basin Cretaceous Hydrocarbons Isopach Chronostratigraphy Graben 

Notes

Acknowledgements

This work is an offshoot of a research work carried out for BG. Nig. Ltd. Part of the proprietary data used for the study was obtained from Chevron/Texaco Nigeria and have been acknowledged in previous publications of the second author. Our sincere thanks also go to the two anonymous reviewers whose suggestions have significantly improved the quality of the paper.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Applied Geology DepartmentThe Federal University of TechnologyAkureNigeria

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