Exploring for fans in Falklands basins Phil Richards BGS & Falkland Islands Government Ian Duncan Desire Petroleum Colin Phipps Desire Petroleum Giles Pickering RPS Energy Jan Grzywacz RPS Energy Ruth Hoult BGS & Falkland Islands Government Joanne Merritt BGS & Falkland Islands Government www.falklands-oil.com
Talk outline: Fans in North Falkland Basin – why not drilled before? Fans in Falkland Plateau Basin Fans in Malvinas Basin How identification of fans improves prospectivity
North Falkland Basin: lots of mid-basin prospects – 6 drilled in 1998 No attempt to locate or drill basin margin sands!
Potential sand input points, North Falkland Basin
Western Fans Eastern Fans
The Western margin fans SW NE Offset wells Post-rift Liz fan Beth fan = major unconformities Late syn-rift Jan fan Early syn-rift
The Beth Fan: 4 way dip closure and strat trap.
The Liz Fan: no structural closure. Strat trap only.
Channel with compaction drape and basal ?flat spot. T-Block – North Sea analogue
Where did the fans come from? Hinterland for deltas & fans
Deltas feeding Liz and Beth fans from west Jan
Eastern Fans
Rachel Ruth Emma Jenny Joanne Phyllis Helene Anna structure
Helene Fan. Fed northwards down Anna relay ramp?
The Rachel Fan: the youngest fan, and derived from a relay to the north of the older fans.
Hinterland for fans from east N S
Maturity in 3D survey area Early oil Main oil Late oil
Maturity in 3D survey area Early oil Main oil Late oil
North Falkland Basin Falkland Plateau Basin Malvinas Basin
Progrades into Malvinas Basin
Progrades into Falkland Plateau Basin 2 to 5 step basinwards New data shows each prograde has an attached low stand fan providing additional targets. 2 3 4 5 1
Visit the Falkland Islands booth in the International Pavilion. Conclusions Fans in all three basins provide great exploration opportunities. Previous drilling shows there are working Petroleum systems. New models show where to drill. Visit the Falkland Islands booth in the International Pavilion.