Oil recovery in oil rim reservoirs are usually affected by reservoir and operational parameters. Placket Burman design of experiment was used to develop various models of oil rims with a broader range of uncertainties. Mensuration analysis was used to create the basic grid designs while the Eclipse software was used to incorporate PVT (pressure, volume and temperature) and solution properties to create a black oil model for oil rims. The models were subjected to concurrent oil and gas production strategy and a response surface model was generated to represent oil recovery for all the models. The models were later classified into drive mechanisms based on the results from the Pareto analysis. Various secondary injection schemes were carried out based on reservoir geometry to investigate their response on oil recovery. Results shows that for single injection schemes, oil recovery from water down dip (6.5%) and water up dip (4.37%) was higher than gas scheme injection for reservoir model 10. Oil recovered from up and down dip water injection (7.1%) was higher than gas up dip and down dip injection (0.03%) for reservoir model 10 and for the same model, an oil recovery of 7.7% and 5.63% was recorded for gas up and water down dip injection and gas down water up dip injection respectively. The final analysis shows that there is an appreciable increased in oil recovery when injection rates are increased as seen in water down dip and up dip injection with 15.43% recovery for reservoir model 10.

Keywords: Oil rim, Design of Experiment, Water and Gas Injection, Response Surface Model.