Sorry but as a "current professional", 25% is correct as an average and MAYBE 35% with advanced tertiary recovery (CO2 or steam flooding)... I don't think I've heard of a single field with a 60% recovery factor (maybe possible in a karstic carbonate...) A good GOM field may have a water saturation of ~30% with the remaining space being filled with hydrocarbons. If you can get 50% of that, you're doing great (50% of 70%= 35%).
This is why I love Free Republic. Thanks to both of you for the analysis. Muldur... did your Democratic Congressman refer to increasing recovery via technology? He didn't did he?
I don't disagree that it takes extraordinary measures to get more than about 1/3rd of the original oil in place out, and it certainly depends on the reservoir quality, but it's not unheard of.
What are the firefloods and steamfloods doing in the heavy oil reservoirs of California? They're obtaining about 52% of the original oil in place (after primary and secondary recovery).