EIA – “Alaska’s crude oil production has declined from 1.8 million barrels per day (MMb/d) in 1991 to 0.5 MMb/d in 2014, and it is expected to continue declining through 2040. Almost 75% of Alaska’s crude oil production from 1990 to 2012 was from the Prudhoe Bay and Kuparuk River fields in the central North Slope, which respectively produced 4.9 billion and 1.7 billion barrels of crude oil over this period. Crude oil production in Alaska is sensitive to the challenging environment—including variable ice conditions and limited time without ice coverage—as well as pipeline economics. However, recent conditional approval granted to Royal Dutch Shell to begin exploratory drilling in the Burger Prospect in the Chukchi Sea may help to offset future declines in crude oil production from other state and federally managed resources in the region.”