Abstract
Abstract The Nigerian LNG Project at Bonny is undergoing significant expansion from it's current 3 trains to 5 trains by the end of 2005. Shell's share of the additional gas demand is met by gas offtake from the Soku oil rim reservoirs. The challenge in Soku is to manage gas offtake between reservoirs to secure optimal hydrocarbon recovery from the oil rims under concurrent production of both gas caps and oil rims This paper addresses the methods used to establish the sensitivity of oil rim recovery to reservoir uncertainties and development strategy. It shows how an idealised box model, preconditioned to match historic production in reservoirs, is used to guide development plans which are later validated in full 3D reservoir simulation models. The box models and full field simulation have been used to confirm that concurrent production of oil rims and gas caps from Soku oil rim reservoirs can be achieved while optimising oil recovery from the rims.
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