Investigation of the Effects of Oil-Gas Ratio in Crude Oil Production


Uti L.O., Ogugu A.A. and Esabunor O.R

Abstract:  With rising crude oil consumption and limited conventional petroleum reserves, big crude oil resources are projected to play more crucial roles in the petroleum industry's future. Also, optimal tubing size selection might result in maximum production from a crude oil well. More so, when drilling a well in a reservoir of any kind, the selection of optimal tubing size must be considered, especially in solution gas drive reservoirs where there is a possibility of generating an increase in gas as reservoir pressure decreases. This research work is therefore focused on investigation of the effects of oil-gas ratio in crude oil production. To forecast the behavior of producing GOR, Tracy methods for estimating a solution gas drive reservoir's performance was employed. The results showed that the bottom hole pressure decreases as tubing diameter increases. Besides, as GOR rises from 840 scf/stb to 1052 scf/stb, the tubing curves shift to the right, indicating an increase in crude oil production. Furthermore, at the lower IPR curves (IPR4 and IPR5), the well cannot be constructed using the larger tubing (4-in).


Keywords: Gas Oil Ratio, Gas Liquid Ratio, Tubing, Crude Oil Production, Pressure.