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Evaluation of Stratigraphic Traps, Block 47, Offshore Suriname

Hugh O'Reilly
Team Leader for Suriname-Guyana, Tullow Oil

Abstract

A new stratigraphic play has been identified in Block 47, offshore Suriname. This deep water block is situated in a sub-basin of the relatively under-explored but proven oil-bearing, Suriname-Guyana Basin on the West Atlantic Transform Margin. A play model of Upper Cretaceous Slope channel complex turbidites deposited within a NW-trending depocentre and with access to the prolific Canje-equivalent source rock has been developed. Tullow has matured several stratigraphically trapped prospects within this play model, which has been proven in the turbidite systems of French Guiana and Ghana.

The up-dip trap mechanism for these exploration targets varies from purely stratigraphic pinchout to combination traps with both stratigraphic pinchout and fault trapping elements. These trapping styles are analogous to Upper Cretaceous fields and discoveries on the conjugate West African margin, including the Tullow-operated Jubilee Oil Field and TEN development complex in Ghana. Acquisition of a high quality 3D dataset has allowed detailed investigation of the stratigraphic trapping elements and enabled significant de-risking of the prospectivity. Attributes such as Spectral Decomposition and seismic inversion products such as Extended Elastic Impedance have also lent support to the presence of reservoirs in this frontier sub-basin.

This presentation will provide an overview of the stratigraphic trapping elements of prospectivity in an exciting frontier basin where the first exploration well is planned for Q3 2015.

AAPG Search and Discovery Article #90204 © AAPG Geoscience Technology Workshop, Stratigraphic Traps and Play Concepts in Deepwater Settings, May 14-15, 2014, Rio de Janeiro, Brazil