UK-based Tullow, has spud the Jethro-Lobe prospect off Guyana with block partner, Eco (Atlantic) Oil & Gas.

The Stena Forth drillship is working on the 250 million-barrel Jethro-Lobe prospect on the Orinduik Block offshore Guyana, near the block containing over a dozen of oil discoveries made by ExxonMobil in the past three years.

According to the Stena website, the Forth is a harsh-environment, dynamically positioned DP Class 3 drillship capable of drilling in water depths up to 10,000’ using 18 3⁄4” – 15,000psi Cameron TL BOP and Cameron Load King Riser. 

The well is expected to take up to 40 days to drill at a reported price of about $170,000 per day.

Tullow indicated that the Jethro- Lobe field may share some common geology to Exxon’s Hammerhead field in the Stabroek block. The feature appears to extend to below the Jethro- Lobe field. 

In a recent article by Upstream, Eco chief executive, Gil Holzman said: “Eco Atlantic's first Guyana well has been spud, three years ahead of our petroleum agreement commitment.

“Jethro Lobe will test the Lower Tertiary aged turbidites, as well drilling down into the Cretaceous. As such, we await the well results with great anticipation, as they will give us an even greater understanding of the geological plays,” Holzman said.

Eco has indicated that there is a potential for 3.98 billion barrels of oil (equivalent) in prospective resources across 15 exploration areas within the block.