Johnny - "Depends on how many more of these projects there are to do I suppose." I probably didn't explain it clearly: I'm not saying CO2 EOR isn't a useful tool. Just the opposite: it's been very useful for DECADES in fields where it was available and cost effective. I'm trying to make the point that until the recent rise in oil prices all fields where CO2 injection could be used it was being utilized.
I offer this to counter the impression some are trying to make that we have this new ERO method to deploy to all our old fields and thus have huge new reserves just down the road. True story: about 6 months ago I looked at a potential CO2 EOR project in west Texas. The reservoir was only at a depth of 2,400'. It had originally contained over 800 MILLION BBLS OF OIL. Very poor recovery factor: about 11% yielding around 75 million bbls of oil. So over 700 million bbls of proven oil. And there are two nearby similar fields that have had EOR CO2 injection for many years. They more than doubled the recovery factor and have pulled out more than 25% on the original in place oil. Even at $80/bbl the additional CO2 recovery from the field I studied would yield a minimum of $6 TRILLION.
So here's a field one might add to the rosy forecast of future EOR projects. Except one little problem: there is no CO2 available: all the available supply is going into those two offset fields. It will be decades before any is available for the field I reviewed. Trust me with $trillions at stake the Rockman and every other company out there have looked for any other viable approach and have found nothing that works economically. BTW the field is currently being held by production: 60 bopd. Yes…60 bopd…not 6,000 bopd or even 600 bopd. The field was bought by a Swiss company for a huge sum of money thinking they could increase recover with horizontal wells. They were very wrong and have lost big time. And yes: if they govt would supply me with the CO2 I would hit that field hard. But they won’t. The govt didn’t fund the Weyburn project for EOR…it was justified on the basis of CO2 sequestration.
I don’t have time but you seem to know how to search the web: Weyburn is extremely unique. Dig deeper and you’ll see that. And don’t forget the obvious: Weyburn is not one of those fields with big future potential: enhanced recovery efforts started there about 28 years ago. Its additional reserves have already been added to our total. Also did you note that the big production increase was coincidental with the beginning of the oil price boom? If you want to find the close current comparison check out
http://www.denbury.com/operations/gulf- ... fault.aspx. One company, Denbury, controls virtually all of the natural CO2 reserves east of the Mississippi River. Pipelines have been laid all the way to the Houston area. So again, this project will significantly increase the recovery from the fields it will be injected into. But in the big picture it’s still not significant.
It’s very easy to project big future recovery from CO2 EOR in the US…if you ignore the lack of CO2 available to do it. Every time you see someone offer those big numbers dig deep and find out where the CO2 will come from. That will be difficult since most of those predictions don’t address that aspect. The word “if” is common in such presentations.