In this report, the EIA confirms that the Bakken, Eagle Ford and Niobrara are all on decline. My guess is that the Permian Basin will join them next month.
http://www.eia.gov/petroleum/drilling/#tabs-summary-2
U.S. oil production on decline per EIA
U.S. oil production on decline per EIA
Dan Steffens
Energy Prospectus Group
Energy Prospectus Group