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French Guiana: Tullow's Zaedyus exploration well makes oil discovery offshore French Guiana


09 Sep 2011

Photo - see caption

Tullow Oil has announced that the Zaedyus exploration well (GM-ES-1), offshore French Guiana, has made an oil discovery having encountered 72 metres of net oil pay in two turbidite fans. Results of drilling, wireline logs and samples of reservoir fluids show that the well has encountered good quality reservoir sands on prognosis.

The objective of the Zaedyus well was to test whether the Jubilee-play, successfully established in West Africa, was mirrored on the other side of the Atlantic. This discovery therefore opens a new hydrocarbon basin within which several neighbouring prospects have been mapped. This result also reduces the exploration risk associated with Tullow's prospect inventory offshore French Guiana, Suriname and Guyana. An appraisal programme and extensive follow-up exploration activities will now be considered.

The Zaedyus well is being drilled in the Guyane Maritime licence using the ENSCO 8503 deepwater semi submersible. The well was drilled in water depths of 2,048 metres and has been drilled to a depth of 5,711 metres. Drilling operations will now continue and the well will be deepened to over 6,000 metres to calibrate the deeper geology. The well will then likely be sidetracked to enable cores to be obtained over the reservoir sections.

Tullow (27.5%) operates the Guyane Maritime license and is partnered by Shell (45%), Total (25%) and Northpet (2.5%), a company owned 50% by Northern Petroleum and 50% by Wessex Exploration.

Photo - see caption
Cingulata Fan System offshore French Guiana being tested by strategic Zaedyus wildcat (GM-ES-1). Note Ghana assets (Jubilee field et al) shown to same scale. Source: Tullow Oil.

Angus McCoss, Tullow's Exploration Director, commented today:

'The discovery at Zaedyus has proved the extension of the Jubilee-play across the Atlantic and made an important new discovery in French Guiana. Tullow has built a commanding and unique acreage position in South America and this result marks the start of a significant and potentially transformational long-term exploration and appraisal campaign in the region.'

Guyane Maritime Licence

The Guyane Maritime licence in French Guiana was acquired as part of the Hardman Resources acquisition in 2007. In November 2009, Tullow announced that it had agreed to farm down 33% of its interest in the Guyane Martime licence to Shell. This was followed in December 2009 by a further farm down to Total of 25%. In September 2010, Shell exercised its option, pending applicable Government approvals, to increase its interest in the Guyane Maritime block by 12% to 45%, which will result in Tullow having a 27.5% interest. A 2,500 sq km 3D seismic programme began shooting in September 2009 and completed in March 2010. The licence is in a proven hydrocarbon basin but is under-explored with only two wells drilled to date, the most recent being in 1978. In mid 2011 the licence underwent a partial relinquishment and currently covers 26,340 sq km.

Original article link

Source: Tullow Oil





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