Commercial hydrocarbons have not been found at the Zaedyus-2 appraisal well in offshore French Guiana after Tullow Oil completed drilling but the group is confident the French Guiana block remains "highly prospective".
The Zaedyus-2 well, which was drilled 5km up-dip from the Zaedyus 1 well, encountered 85 metres of reservoir quality sands with oil shows but no commercial hydrocarbons.
Tullow Oil pointed out that the reservoirs at this location were not connected with Zaedyus-1. Information obtained from the two wells using 3D seismic data suggests the reservoirs are geologically separated from Zaedyus-1.
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As the Zaedyus-2 well is up-dip and disconnected from Zaedyus-1, the Group said the result had "no bearing on the bulk of the undrilled prospectivity which is located downdip of Zaedyus-1"
Angus McCoss, exploration director at Tullow Oil, said: "While the Zaedyus-2 well has not proved an up-dip extension of the Zaedyus discovery towards the apex of the fan, the well has provided very valuable data for the exploration and appraisal strategy of the Cingulata fan system going forward."
"The French Guiana block remains highly prospective, particularly down-dip and still offers excellent potential for multiple exploration successes. These early lessons learned by the joint venture are being incorporated into our ongoing well campaign," he added.
Tullow has a 27.5% stake in the Guyane Maritame licence and is partnered by Shell, which is the operator and holds a 45% stake, Total and Northpet, a company owned 50% by Northern Petroleum PLC and 50% by Wessex Exploration.
The share price fell 5.03% to 1,302 pence by 11.58 GMT.
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