Tullow Oil has discovered hydrocarbon shows at its Kodos-1 exploration well in Kenya.
It has been undertaking a series of exploration and appraisal activities in Blocks 10BB and 13T onshore in East Africa.
The company said the Kodos-1 exploration wildcat in Block 10BB was the first well drilled in the Kerio Basin, northeast of the South Lokichar Basin.
Tullow Oil said the presence of an active petroleum system was found, but reservoirs were “mixed quality” alluvial sands close to the basin boundary fault.
The Weatherford Rog-804 drilled Kodos-1 to a depth of 2,500 metres and the well will now be plugged and abandoned.
The rig will now be moved to drill the second well in the basin at Epir-1, 25 km north of Kodos-1 in a separate sub-basin.
Following the discovery of hydrocarbon shows at Kodos-1, further drilling in the greater Kerio Basin is expected next year.
Angus McCoss, exploration director, said: “The Kodos-1 well is the first test of the Kerio Basin and hydrocarbon shows provide encouragement, indicating the presence of an active petroleum system.
“The potential of the Kerio Basin remains highly prospective and the rig is now moving to drill the next well, Epir-1, in a sub-basin to the north of Kodos-1.
“South Lokichar Basin activity continued with exploration and appraisal drilling and well testing.
“The Ekosowan-1 well encountered a significant interval of oil shows however reservoirs at this location were tight.
“We look forward to stepping out from Ekosowan towards the Amosing oil field in pursuit of better reservoirs.
“Appraisal and well testing success continues with Ngamia-4 finding a substantial section of oil pay and Twiga-2A recording our highest flow rates to date.”