When I think of the lush green prehistoric algae oceans, the cause of oil – I’d expect these alga pileups to occur in bays, gulfs and lagoons brought there by currents, and becoming more stagnant in shallower waters … Actually more or less just where we observe the oil locations/- findings of today - according to today’s geology ..

Whatever oil found on land today – used to be ocean floor…

The Falklands are not in the right place for oil, in the middle of a large ocean

Am I wrong?

At first glance, the Falklands basin described in the .pdf is similar to the North Sea Viking graben.

Essentially, it looks like rift valley. Where Horst Blocks have parted and a graben has slumped. Similar to the African Rift Valley, or the Rhine Valley.

Tyically you get fluvial and lacustrine systems, lake beds, channel sands etc. Sediment and organic matter accumulates, which under the right conditions, can lead to oil generation, resevoir and trapping. But, as an above surface structure Total Organic Content (TOC) may be quite small.

They drilled 6 wells, Hydrocarbons shows were present, I dont know if any wells gave successful tests (flowing, flaring).

Dont hold your breath. It looks encouraging (in so much that they hit clastic sediments of the right age range and types), but it will be a while yet before reserves get booked - if any.