Savannah Petroleum has begun drilling its first well in southeastern Niger, the company said on April 3. The Bushiya-1 well was spudded on March 31, in the R3 area in southeast Niger’s Agadem Rift Basin. The company had earlier planned to begin its exploration work in the first half of 2017 but this was thrown off track by its acquisition of Seven Energy, a Nigerian-focused gas producer.
The well’s primary target is to test the potential oil pay in the Eocene Sokor Alternances, a secondary target that lies in the Eocene-Oligocene Upper Sokor. CGG Robertson has provided a total unrisked recoverable resource of 36 million barrels at Bushiya.
Drilling will be carried out by Rig GW-215, owned by Great Wall Drilling Co. Niger (GWDC). Drilling and logging should take 35-40 days, Savannah said, with a total depth of 2,114 metres targeted.
Should the well be successful, it will be suspended for further evaluation, potentially using a dedicated testing and workover rig. This is the first of a three-well programme, although there is an option with GWDC for another six wells.
Following Bushiya, company will drill the Amdigh and Kunama prospects, with all sharing the primary and secondary targets. CGG has said these three wells may have 110 million barrels of resources. Success at these wells will trigger further work, it seems, with Savannah saying it had at least 115 similar targets in the region. Production would go via Nigeria, with a high-level agreement struck in February on a pipeline.
Savannah took delivery of pre-stacked time migrated (PSTM) data from its R3 East 3D seismic survey in early July 2017, from BGP Niger. This, the company said, met its objective of improved imaging on the Upper Sokor and Alternances plays. The data covers 806 square km and came in US$1.2 million under budget.
Before the Seven Energy deal, Savannah was solely focused on exploration. Adding the Nigerian company to its portfolio provides it with cash flow and production.