ABSTRACT
Fluid sampling is to preserve the integrity of the reservoir fluids, so is the planning of sequence and type of laboratory experiments to aid on the fluid and displacement process characterization. Asphaltene precipitation is often determined in the laboratory using “injection gas compatibility test” where the onset is mapped at different pressures and compositions. Impact of planning and clear strategy for the use of laboratory experiments is particularly important for miscible and near-miscible flooding where laboratory results help to further calibrate equations of state that subsequently are used to predict reservoir performance and recovery. Single-phase composition is one of the main objectives of any laboratory studies, to either complement or validate the in situ measurements taken during the sampling activity and/or to characterize the reservoir fluid for the first time. The minimum miscibility pressure is the minimum pressure at which a single phase exists between the injected solvent and the hydrocarbon fluid at reservoir conditions.
