tone - Ecopetrol don't seem in any great rush to change the contracts over. I would expect that EEN will let us know when it happens. It's a real bugger for the valuation not to know whether to deduct 50% of everything or not. I think it's sensible not to but there's always that nagging doubt.
I'm not entirely clear what it means to "deliver" the Campo Rico crude to Ecopetrol. Maybe I'm not up to speed with how the Campo Rico contract is working. Actually, there's no maybe about it. I guess I should work it out properly like some of you seem to have done already (eg madfishman). Presumably it is all different once the field is declared commercial.