“Prudhoe Bay (at least 50% depleted) is the largest oil field in America with original reserves of 13 billion barrels.”
According to oil execs that I had contact with in the 70s there is a field east of Prudhoe Bay that is 10 times the size of Prudhoe that was drilled and capped by Standard oil in the early 60s.
East of Prudhoe Bay is ANWR which was originally set aside as an oil preserve. There is also an even larger oil preserve west of Prudhoe. There are know fields offshore from Prudhoe. If you believe rumor, ground penetrating radar from orbit says there is a much larger field further down at Prudhoe itself. Current projections are for forty to fifty more years of oil production at Prudhoe itself using current wells at a slowly declining rate followed by about the same for gas production.
I worked most of the last four years in Prudhoe. Peak oil is laughable...