Tullow Oil has made a second discovery following the drilling of its Joe-1 exploration well on the Orinduik Block. The well was drilled by the Stena Forth drillship to a total depth of 2,175 metres in water depth of 780 metres.

Guyana Standard understands that evaluation of logging and sampling data has confirmed that Joe-1 has encountered 14 metres of net oil pay in high-quality oil bearing sandstone reservoirs of Upper Tertiary age.

Significantly, Tullow noted that Joe is the first oil discovery to be made in the Upper Tertiary and therefore de-risks the petroleum system in the west of the Orinduik block, where a significant number of Tertiary and Cretaceous age prospects have been identified.

The next stage is for Tullow and its partners to evaluate the data from the Joe-1 discovery alongside data from the Jethro-1 discovery announced in August 2019 and await the outcome of the Carapa well on the Kanuku Block. Following this, the oil major will determine the optimal follow-on exploration and appraisal programme.

The Carapa-1 well on the Kanuku licence is operated by Repsol and is scheduled to commence drilling in late September with the Rowan EXL II jack-up rig and will test the Cretaceous oil play with a result due in the fourth quarter of 2019.

Joe-1 was drilled on the Orinduik licence, offshore Guyana by Tullow’s wholly owned subsidiary Tullow Guyana B.V.

Tullow Guyana B.V. is the operator of the Orinduik block with a 60% stake. Total E&P Guyana B.V.  holds 25% with the remaining 15% being held by Eco (Atlantic) Guyana Inc.

On completion of operations, the Stena Forth drill ship will depart Guyana and return to Ghana.

Tullow’s Exploration Director, Angus McCoss noted that the company is pleased with the back-to-back discoveries made in Guyana, with the most recent one opening a new, shallower play in the Upper Tertiary age of the Guyana basin.

 “The Joe-1 discovery and its surrounding prospects represent another area of significant potential in the Orinduik Block and we are greatly looking forward to the next phase of the programme as we continue to unlock the multi-billion barrel potential of this acreage,” McCoss noted.


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