I believe that LA portion of the pipeline is what get's you to the industrial sales point (Praxair, Pepsi) for the excess CO2 (near Baton Rouge?).
Look at slide 14 of the DNR presentation sometime. It shows the DNR CO2 pipeline in relation to what are probably GEL or partly GEL oil pipelines and some NG ones. I don't know anything about conversion issues, sizing or the like, but, superficially, the intersections of those pipelines are suggestive of a future opportunity. Minimally they are at least from a right of way point of view.
Maybe someone familiar with pipelines could comment on conversion issues and the like. I recall a smart poster here some time back opining that pipelines can cost $1mm/mile but I don't know if that is an applicable rule of thumb here.