Exploring for fans in Falklands basins Phil Richards

Exploring for fans in Falklands basins Phil Richards BGS & Falkland Islands Government Ian Duncan Colin Phipps Giles Pickering Jan Grzywacz Ruth Hoult Joanne Merritt Desire Petroleum RPS Energy BGS & Falkland Islands Government www. falklands-oil. com © NERC All rights reserved

Talk outline: Fans in North Falkland Basin – why not drilled before? Fans in Malvinas Basin Fans in Falkland Plateau Basin How identification of fans improves prospectivity © NERC All rights reserved

North Falkland Basin: lots of mid-basin prospects – 6 drilled in 1998 No attempt to locate or drill basin margin sands! © NERC All rights reserved

Potential sand input points, North Falkland Basin © NERC All rights reserved

Western Fans © NERC All rights reserved Eastern Fans

The Western margin fans SW NE Offset wells Post-rift Liz fan Beth fan = major unconformities Late syn-rift Jan fan © NERC All rights reserved Early syn-rift

The Beth Fan: • 4 way dip closure and strat trap. © NERC All rights reserved

The Liz Fan: • no structural closure. Strat trap only. © NERC All rights reserved

S Channel with compaction drape and basal ? flat spot. © NERC All rights reserved T-Block – North Sea analogue N

Where did the fans come from? Hinterland for deltas & fans © NERC All rights reserved

Deltas feeding Liz and Beth fans from west Liz Beth Jan © NERC All rights reserved

Eastern Fans © NERC All rights reserved

Rachel Ruth Emma Jenny Phyllis Joanne Helene Anna structure © NERC All rights reserved

Helene Fan. Fed northwards down Anna relay ramp? © NERC All rights reserved

The Rachel Fan: the youngest fan, and derived from a relay to the north of the older fans. © NERC All rights reserved

Hinterland for fans from east N © NERC All rights reserved S

Maturity in 3 D survey area Early oil Main oil Late oil © NERC All rights reserved

Maturity in 3 D survey area Early oil Main oil Late oil © NERC All rights reserved

North Falkland Basin Malvinas Basin © NERC All rights reserved Falkland Plateau Basin

Progrades into Malvinas Basin © NERC All rights reserved

Progrades into Falkland Plateau Basin 2 to 2 5 ste 3 p ba sinw ards 4 5 1 © NERC All rights reserved New data shows each prograde has an attached low stand fan providing additional targets.

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. © NERC All rights reserved