Relative permHerrera is very fine grained so 3 fluid phases(oil, gas, water) present in a reservoir need lower water saturations to allow fluid flow. Chinook twinned and old Shell well with lots of rich oil shows so there is likely some oil in the reservoir. That is great but the fine grained nature of Herrera means that good oil shows with moderate water saturations flow next to nothing although pores do contain some oil. Logs need to be very carefully analyzed to distinguish between an oil saturation that is valueless and one that will produce oil and mistakes easily made. Royston is a twin of another old Shell well with very few oil shows and old logs of the thin bedded turbidites. It may be more like it's on strike analogue, Carapal Ridge 1, that had limited oil shows and over 600 feet of Herrera turbidite pay sands. In summary Chinook easily fools anyone that doesn't have a firm grasp of the Herrera reservoirs and relative permeability effects. Cheer for gas and liquids at Royston, not oil. Tests will tell, I am optimistic.