Ummm... the first oil production in the Middle East was in 1908... While the North Sea Fields didn't begin production until North Sea oil was discovered in the early 1960s,[ with the first well coming on line in 1971.
"In 1901, British businessman William D'Arcy convinced the Persian government to award him a concession for oil exploration, extraction, and sales in exchange for �20,000 and 16% of profits over the next 60 years." (Source: Yergin, Daniel. The Prize. New York: Simon & Schuster, 1991)...
Actually, wildwood is quite accurate... This sea (described by wildwood) eventually disappeared, sealing large deposits of organic matter under a salty crust. "Over the eons, this crust was in turn covered by layer upon layer of sediment. As the sediment was compressed under the increasing weight of the layers above, it hardened into limestone. About 15 million years ago, the shifting of tectonic plates of the region formed large, underground fissures. As the organic matter migrated through the layers of limestone, much of it seeped into these fissures". (Source: World Geology)...
These deposits of organic matter became crude oil.