Study on Pseudocomponent Selection & EOS Characterization Influence on Miscibility Pressure

In oil and gas industry, especially exploration and production phase, the main
concern is to produce as much oil from the reservoir as possible, which is by
optimizing the oil recovery. Since only 20-40% of the total oil in place can be
recovered naturally and through pressure lifting, thus enhanced oil recovery (EOR)
should be employed to increase the recovery. One of the methods is by miscible
injection of gas.
Minimum miscible pressure (MMP) is the pressure at which injection gas mixes
with oil, so that oil becomes more mobile and easily moved out from the reservoir.
Some factors that affect the value ofMMP are the number ofpseudocomponent that is
used in simulating the reservoir, and also type of Equation of State (EOS) that is used
to characterize the reservoir. Therefore, the main outcome of this study is to see how
MMP is dependent on the selection of number of pseudocomponent and EOS
characterization.
The scope of study of this project would be mainly on reservoir field, with
specification on miscibility pressure for EOR. This includes gathering information and
literature study on MMP, EOS characteristics and also pseudocomponents properties,
familiarization to the software used, simulation using the software, and also result
analysis based on the output from the simulation. At the end of the day, the outcome
from the simulations would be evaluated to see how these two factors influenced the
MMP results.