OLALEKAN A. OLAFUYI

Gas condensate is very important reservoir fluid because it is made up of a mixture of low density mixture of hydrocarbon in which during processing it yields other products like associated dry gas and also creates condensate oil after being extracted. A condensate reservoir exhibits a unique characteristic which make it special and at the same time difficult to recover due to liquid banking which is formed as a result of pressure and temperature change during production. In other to optimize production in a gas condensate reservoir proper attention must be paid to its phase behavior.The objective of this study is to model a gas condensate reservoir. The approach used in this study is the compositional analysis (the use of software) to determine the components of the gas condensate and compared with experimental approach which involve constant composition expansion (CCE) test and constant volume depletion (CVD) test. CCE provides information about the dew point, relative volume of fluid and condensate liquid while CVD provides information about condensate oil saturation and condensate oil and gas recovery. Finally the empirical method which is the equation of state model (EOS) using a simulation software to match the results gotten from the different approaches. The result of the study from compositional analysis simulation shows that the P-T diagram of critical pressure, temperature can be constructed and its results shows that composition significantly varies as a function of fluid phase behavior and also affects the producing sequence of a condensate reservoir. It as well pointed out the need to conduct more studies on characterization in other to be able to make the best recovery choice for optimal production from a gas condensate reservoir