Oct. 19 (oilnow.gy) ExxonMobil is evaluating wells near its Ranger discovery offshore Guyana for possible tiebacks to a future development, with Rockhead among the wells drilled this year.
John Ardill, ExxonMobil’s vice president, outlined the work in a LinkedIn post. The exploration and appraisal program is gathering subsurface data to assess a commercial development in the central part of the Stabroek Block.
“This includes testing nearby prospects which could be tie-backs to a Ranger development. Rockhead is one of these near-field wildcat wells which was drilled earlier this year,” Ardill wrote.
Ranger was discovered in 2018. ExxonMobil continues to drill appraisal wells around the discovery.
“We are excited to continue exploration and appraisal activity in-and-around our significant Ranger discovery drilled in 2018 in the central part of the Stabroek block where we continue to drill appraisal wells to collect subsurface data and evaluate the path to commercial development,” the executive explained.
His comments accompanied a reshared post by Energy Intelligence correspondent Marc Roussot. Roussot reported that Ardill described a recent “big discovery” in central Stabroek during an interview at the Energy Intelligence Forum 2026 in London.
According to Roussot, the discovery was made about a month to six weeks before his report. ExxonMobil is conducting appraisal work and production tests to better define the resource.
OilNOW reported on August 4, 2026, that the Stena Carron was drilling Rockhead-1. A Maritime Administration Department notice located the prospect approximately 115.2 nautical miles offshore Guyana. Drilling activities were scheduled to conclude on August 31.
ExxonMobil had previously identified Rockhead-1 as an oil target, stating: “Rockhead-1 is targeting oil, though fluids are often difficult to predict pre-drill.”
ExxonMobil operates the Stabroek Block with a 45% stake. Its co-venturers are Hess, owned by Chevron, and CNOOC.
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