Senegal Applies To Join The Elite Oil Producers’ Club - Africa’s premier report on the oil, gas and energy landscape.

Senegal Applies To Join The Elite Oil Producers’ Club

29metres Net, no water contact, 500metre column, but the number of reservoirs remains undisclosed

London listed Cairn Energy has given notice that Senegal is about to join the oil club. On October 7, 2014, the Scottish independent announced an oil discovery offshore the Northwestern country, one of the least explored territories on the continent. The FAN-1 exploration well, located in 1,427metres water depth and approximately 100kilometres offshore in the Sangomar Deep block, was drilled to the Planned Total Depth (PTD) of 4,927metres, targeting multiple stacked deepwater fans.

Cairn has no plans for immediate well testing. The company’s Preliminary analysis indicates:

  • 29m of net oil bearing reservoir in Cretaceous sandstones
  • No water contact was encountered in a gross oil bearing interval of more than 500m
  • Distinct oils types ranging from 28° API up to 41° API  indicated so far from a number of oil samples recovered to surface
  • Initial gross STOIIP estimates for the FAN-1 well range from P90, 250 mmbbls, P50, 950 mmbbls to P10, 2,500 mmbbls and are broadly in line with pre-drill STOIIP estimates

“Further evaluation will now be required to calibrate the well with the existing 3D seismic in order to determine future plans and optimal follow up locations to determine the extent of the discovered resource.

“Once operations are completed on the FAN-1 well, the rig will move to complete the second well, SNE-1 where the top hole has been drilled pending re-entry. This Shelf Edge Prospect targeting a dual objective in 1,100m water depth is in the Sangomar Deep block”.

The FAN-1 well was drilled using the semi-submersible drilling unit “Cajun Express“. It is the third well in Cairn’s North West Africa programme and first in Senegal.

Cairn has a 40% Working Interest (WI) in three blocks offshore Senegal (Sangomar Deep, Sangomar Offshore and Rusifique) ConocoPhillips has 35% WI, FAR Ltd 15% WI and Petrosen, the national oil company of Senegal 10% WI. The three blocks cover 7,490 km2.

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