HOUSTON – A sidetrack well at the Harvest Natural Resources-operated Dussafu license offshore Gabon has encountered 65 ft (20 m) of oil pay in the presalt Dentale reservoir.
The Dussafu Tortue Marin-1ST1 appraisal well was drilled to a total depth of 11,385 ft (3,470 m) in 380-ft (116-m) water depths about 1,800 ft (549 m) from the DTM-1 discovery well. Samples from the sidetrack well indicated “better reservoir character and an apparent similar fluid level to that encountered in the (DTM-1) well,” Harvest said. A stuck downhole tool forced the company to terminate logging operations before it could collect the pressure data needed to confirm connectivity with the previously announced Dentale discovery, however.
“The addition of the Tortue oil discovery extends the proven fairway for stacked presalt reservoirs and has demonstrated the exploration potential for the outboard part of the Dussafu license,” Harvest said.
The Houston-based company holds a 66.667% interest in the Dussafu license; Panoro Energy owns the remaining interest.
The block partners are evaluating development options for the block, which includes the 2011 Ruche oil discovery.