That's a very interesting link Saturn V. I might add that it is important to bear in mind that the Gulf of Mexico is highly oil prone (delta system with high rates of burial of organic matter). Mid-ocean ridges and thereabouts are not oil prone as they lack organic source material and the sediment to bury them. The oil slick discussed above is highly unlikely to be from a "natural" source. The above is a gross generalisation, but there are very good reasons why oil companies explore continental margins and not oceanic crust.