Geological structure and oil and gas content of the shelf of the Republic of Equatorial Guinea

Cover Page

Cite item


The oil and gas potential of the Republic of Equatorial Guinea, in which revenues from the sale of gas and oil account for more than 90 % of national income, is studied. An urgent issue is to increase oil and gas reserves, in this regard, the task is to assess the prospects for discovering new oil fields based on the analysis of geological information. The oil and gas basin of the Gulf of Guinea stretches as a narrow coastal strip along the western coast of equatorial Africa and is represented by thick sedimentary strata. The most significant basin of the Rio Muni contains a thick promising stratum of Senonian deposits overlain by Tertiary sediments, the thickness of which increases from south to north. Intervals of reservoir rocks with good porosity properties are known in both Tertiary and Cretaceous sediments, but industrial productivity has so far been established only in the Cretaceous sediment complex. Within the basin there are promising oil and gas bearing areas with anticlinal zones of oil and gas accumulation, which are associated with screening of tectonic, stratigraphic and lithological types. In the southern parts of the basin, saline deposits are not deep and are of interest for the exploration of oil deposits. The results of the study showed that in the Rio Muni Basin, the territory of Block K in the southernmost part of Equatorial Guinea is a promising region with proven hydrocarbon reserves. The Paleocene and Turonian reservoirs consist of undeformed slope submarine fans similar to the Deepwater Campos Basin in Brazil.

About the authors

Alexander E. Kotelnikov

Peoples’ Friendship University of Russia (RUDN University)

ORCID iD: 0000-0003-0622-8391

PhD in Geology, Associate Professor, Head of the Department of Mineral Development and Oil & Gas Engineering, Academy of Engineering

6 Miklukho-Maklaya St, Moscow, 117198, Russian Federation

Lazaro M. Ondo Ayenvegue

Peoples’ Friendship University of Russia (RUDN University)

Author for correspondence.
ORCID iD: 0000-0002-9667-0230

master student, Department of Mineral Development and Oil & Gas Engineering, Academy of Engineering

6 Miklukho-Maklaya St, Moscow, 117198, Russian Federation


  1. Frynas G. The oil boom in Equatorial Guinea. African Affairs. 2004;103(413):527-546.
  2. Shlüter T. Geological atlas of Africa: with notes on stratigraphy, tectonics, economic geology, geohazards, geosites and geoscientific education of each country. Springer Berlin Heidelberg; 2006.
  3. Denuola O. Equatorial Guinea to increase oil output in 2020. Pumps Africa. 2020;1(1). Available from: (accessed: 15.11.2021).
  4. Remadna A, Cueto D, Marzouk H, Arteaga M, Lyubovskaya N, Shokripour M, Morales R, Arenas Lara R. GECF in the world: GECF Annual Statistical Bulletin 2020. 4th ed. Doha Qatar; 2020. p. 57.
  5. Brownfield ME, Charpentier RR. Geology and total petroleum systems of the Gulf of Guinea Province of west Africa. U.S Geological Survey Bulletin 2207-C. 2006. 32 p.
  6. Ross D, Hempstead N. Geology, hydrocarbon potential of Rio Muni area, Equatorial Guinea. Oil and Gas Journal. 1993;91(35):96-100.
  7. Hydrocarbons and mining in Equatorial Guinea. Petroleum potential. Geology of Offshore Bioko. 2012;(1):13-15. Available from: (accessed: 20.12.2021).
  8. Khain VE, Polyakova ID. Large and giant hydrocarbon accumulations in the continent-ocean transition zone. Geotectonics. 2008;42:163-175.
  9. Irons C, Bray R, Abrahamson P. New hydrocarbon prospects in Equatorial Guinea. GEO EXPro. 2018;15(1): 52-54. Available from: (accessed: 20.12.2021).

Copyright (c) 2022 Kotelnikov A.E., Ondo Ayenvegue L.M.

License URL:

This website uses cookies

You consent to our cookies if you continue to use our website.

About Cookies