The East African margin is now an established as a giant gas province in Tanzania and Kenya. However, large areas to the north and south of the gas province remain very lightly explored in Somalia, Mozambique and South Africa. Sandstone reservoirs and structural traps are abundant along most of the margin due to multiple stages of uplift, denudation, rifting and basin inversion. The key ingredient still missing is an oil prone source rock. This paper reviews the geology of the undrilled deepwater margins outside the main gas province, and investigates the potential for the presence of oil prone source rocks.

Seismic data indicate strong low impedance (negative) reflectors developed downdip of the Lower to Mid Cretaceous shelf edge where better development of anoxic condition is likely to preserve organic matter. These reflectors also exhibit a strong negative AVO response which usually indicates a strong anisotropy typical of organic rich source rocks. The talk will highlight some of these occurrences.


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  1. Sandwell, D.T., Müller, R. D. Smith, W. H. F., Garcia, E. & Francis, R.
    , [2014]. New global marine gravity model from CryoSat-2 and Jason-1 reveals buried tectonic structure. Science, 346 (6205), pp. 65–67, doi: 10.1126/science.1258213.
    https://doi.org/10.1126/science.1258213 [Google Scholar]
  2. Davis, J.K., Lawver, L.A., Norton, I.O. & Gahagan, L.
    [2016]. New Somali Basin magnetic anomalies and a plate model for the early Indian Ocean. Gondwana Research, 34, 16–28.
    [Google Scholar]
  3. Davison, I., and Steel, I.
    , [2018]. Geology and Hydrocarbon Potential of the East African continental Margin: A Review. Petroleum Geoscience, 24, 57–91https://doi.org/10.1144/petgeo2017-028.
    [Google Scholar]
  4. De Buyl, M., and Flores, G.
    [1986]. The Southern Mozambique Basin: The Most Promising Hydrocarbon Province Offshore East Africa. American Association of Petroleum Geologists Memoir40, 399–425.
    [Google Scholar]
  5. Eastwell, D., Hodgson, N. and Rodriguez, K.
    [2018]. Source rock characterization in frontier basins – a global approach. First Break, 36(November), 3–10.
    [Google Scholar]
  6. Sauter, D., Ringenbach, J.C., Cannat, M., Maurin, T., Manatschal, G., and McDermott, K.G.
    , [2018]. Intraplate deformation of oceanic crust in the western Somali Basin: insights from long offset seismic reflection data. Tectonics, 37, 588–601. https://doi.org/10.1002/2017TC004700
    [Google Scholar]

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