RE: Additional Thoughts on Cas / Cas Deep / Chinook1 Dec 2020 15:59
A transition zone is what I heard it called at Shell. If the water contact has not been determined yet, it leaves the possibility also of an oil rim perhaps below the gas, as at Troll in Norway, and Coulomb in the US GOM, which can be a pleasant surprise, but may also present field management issues. Not knowing OWC is probably a limiting factor in the calculation of proved reserves, i.e. lowest known hydrocarbon, although not so much in working 2P.