The Sea Lion field was the first commercial discovery in the Falkland/Malvinas Islands. Located to the north of the islands, Sea Lion was discovered by Rockhopper Exploration in 2010. It has been comprehensively appraised and plans are being formulated to develop it via subsea wells tied back to an FPSO. Sea Lion is located on the northeast flank of the North Falkland basin. The reservoir comprises stacked, turbidite sandstone fans of Lower Cretaceous age. The stratigraphic pinchout of these sands against the basin margins forms the primary seal. An additional seal is provided by a thick shale above the reservoir.