At the moment I'm looking for Wyoming, South Dakota, and Colorado, but is there any source that goes back farther than the EIA website (http://www.eia.gov/dnav/pet/hist/LeafHandler.ashx?n=pet&s=mcrfpwy1&f=a)?
EIA has data that goes back further, but on a different part of the website: http://www.eia.gov/pub/oil_gas/petrosystem/petrosysog.html (download the XLS file at the top of the page).