Victoria Oil & Gas’ (VOG) unit in Cameroon, Gaz du Cameroun (GDC), spud two new development wells on the Logbaba gas field surveyed using passive seismic in 2009.
The two wells, ( La-107 and La-108), are being drilled by Savannah Oil Services Cameroon using the Komako 1 drilling rig.
The new wells are required to meet the growing market demand for gas in Douala, to develop Logbaba reserves and to move some of the 2P (Proven plus Probable) reserves into the 1P (Proven) reserve category. One of the wells, La-107, will twin the La-104; the other well, La-108, will be a ‘step-out’ well that will be drilled into a target that is intended to prove up more Probable reserves.
Both wells will be drilled directionally from a drilling pad adjacent to the Logbaba processing plant, and will be tied into this facility once completed. The La-104 twin well is almost vertical; whereas La-108, the ‘step-out’ well, will be drilled to intersect a target that is about 1,100 meters to the south-east of the Logbaba drilling pad.
The wells are intended to be production wells completed in the Upper Cretaceous (Campanian and Santonian) Logbaba Formation, which is a thick sequence of interbedded sands and shales found at depths between 1,700 and 3,200 meters below the surface. In addition to developing the gas reserves in the Logbaba Formation, one of the wells, La-107, has an additional objective of an ‘exploration tail.’
This is to be drilled from the base of the Logbaba Formation down to 4,200m below the surface to test the hydrocarbon potential of the Lower Cretaceous Mundeck Formation which had gas shows and a significant gas kick in La-104 (which is twinned by La-107). Execution of the exploration tail is dependent on well conditions to be established during the drilling program.
Drilling is scheduled to complete in Q2 2017.