Abstract
ABSTRACT A CO2 predictive model has been used to assess the viability of CO2 miscible processes in two Nigerian crude oil reservoirs. These reservoirs designated ND-1 and ND-2 contain undersaturated 22°API of oil with an initial pressure of 2200 psia at 5100ftss. From the study, approximately 19% and 25% OOIP oil recoveries equivalent to gross CO2 requirements of 0.216 and 0.281 STB of oil/MCF of CO2 were predicted respectively for ND-1 and ND-2 reservoirs at WAG ratio of 1.0 and total fluid injection rate of 1500 bbl/d on a 124.2 acres 5-spot pattern. These predictions compare favourably with values which have been reported for successful field projects.
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