Petroleum Africa
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Thursday, January 28, 2016
Senegal added to its oil and gas potential with a new gas discovery off its coast. Kosmos Energy’s Guembeul-1 exploration well, located in the northern part of the St. Louis Offshore Profond license, hit a significant reservoir of gas while drilling. The well is located south of the basin-opening Tortue-1 (renamed Ahmeyim) gas discovery offshore Mauritania on Block C8.
The Guembeul-1 was drilled to a total depth of 5,245 meters and encountered 101 meters of net gas pay in two excellent quality reservoirs, including 56 meters in the Lower Cenomanian and 45 meters in the underlying Albian, with no water encountered. Importantly, Guembeul-1 demonstrated reservoir continuity as well as static pressure communication with the Tortue-1 well in the Lower Cenomanian, suggesting a single, large gas accumulation. Moreover, the well has significantly de-risked adjacent prospectivity, including proving the existence of excellent quality reservoirs in the Albian. It also provided additional calibration of our seismic attribute exploration tool, confirming its reservoir and fluid predicative capability for these primary exploration targets.
Based on the integration of the Guembeul-1 well results, the Pmean gross resource estimate for the Tortue West structure has increased to 11 Tcf from 8 Tcf as a result of greater reservoir (net to gross) confidence in the Cenomanian, as well as the inclusion of volumes in the Albian. Accordingly, the Pmean gross resource estimate for the Greater Tortue Complex has increased to 17 Tcf from 14 Tcf.
Kosmos entered into a MoUwith the state-run firms of Senegal and Mauritania, Pétroles du Sénégal (Petrosen) and Société Mauritanienne Des Hydrocarbures et de Patrimoine Minier (SMHPM), respectively, setting out the principles for an intergovernmental cooperation agreement for the development of the cross-border Greater Tortue resource. The MoU enables Kosmos and the two governments to work together toward early development of the field, thereby maximizing value for all stakeholders.
“We are pleased to have delivered another major discovery with our first exploration well offshore Senegal. Guembeul-1 confirms the presence of a world class gas resource that extends into both Senegal and Mauritania. With our successful appraisal program and support of both governments, the initial gas development is gaining momentum,” said Andrew G. Inglis, chairman and chief executive officer. “The Guembeul-1 well continues our 100% success rate in the outboard Cretaceous petroleum system offshore Senegal and Mauritania, which we believe is a strategically important new oil and gas province and we are focused on unlocking the basin’s full potential.”
The Atwood Achiever drillship which drilled the well is now moving to Mauritania to drill the Ahmeyim-2 delineation well in the southern part of Mauritania’s Block C-8. This will test the downdip limits of the field and is expected to complete appraisal of the Tortue West structure.
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