--> --> The Lone Ranger or a Posse of Prospects? A Deepwater Playground from Guyana to Cape Town

2019 AAPG Latin America & Caribbean Region Geosciences Technology Workshop:
Recent Discoveries and Exploration and Development Opportunities in the Guiana Basin

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The Lone Ranger or a Posse of Prospects? A Deepwater Playground from Guyana to Cape Town

Abstract

The Ranger reservoir is unique in a string of successes in Guyana's deepwater Stabroek block - a thick carbonate buildup rather than a clastic fan - and the Walker carbonate prospect offshore Suriname holds promise. The authors see potential for Ranger-inspired liquids success in a deepwater play that follows the South Atlantic margins but in less than Ranger-equivalent total sediment thicknesses. We consider potential for carbonate buildups that grew where hot spot tracks and leaky oceanic fracture zones intersected continental crustal boundaries. Adjacent inboard accumulations of organic-rich marine muds form our projected hydrocarbon source. Both source maturity and reservoir buildups will require uncharacteristic heat flows for the water depths and burial depths but are projections from our work in Brazil's Santos and Sergipe basins. We also assess charge risk including CO2 presence as seen across our play region.