Changes

Recombined separator samples are standard for gas condensate fluids, but they may also be used for oil reservoirs. Bottomhole sampling is preferred for oils if the reservoir is undersaturated (that is, the initial pressure is higher than the bubblepoint pressure).

Recombined separator samples are standard for gas condensate fluids, but they may also be used for oil reservoirs. Bottomhole sampling is preferred for oils if the reservoir is undersaturated (that is, the initial pressure is higher than the bubblepoint pressure).

Standard PVT experiments include compositional gas chromatography (GC) analysis through heptanes-plus (C₇₊), constant composition expansion, differential liberation expansion, constant volume depletion, and multistage surface separation. Other PVT measurements include true boiling point (TBP) distillation of the C₇₊ material and multicontact gas injection experiments. Table 3 summarizes these experiments, indicating when they are performed and on what types of reservoir fluids.

Standard PVT experiments include compositional [[gas chromatography]] (GC) analysis through [[heptane]]s-plus (C₇₊), [[constant composition expansion]], [[differential liberation expansion]], [[constant volume depletion]], and multistage surface separation. Other PVT measurements include true boiling point (TBP) distillation of the C₇₊ material and multicontact gas injection experiments. Table 3 summarizes these experiments, indicating when they are performed and on what types of reservoir fluids.

{| class = "wikitable"

{| class = "wikitable"

'''Key:''' * standard, + can be done, – not done

'''Key:''' * standard, + can be done, – not done

Compositional analyses are used to describe the reservoir fluid makeup on a component basis, including calculation of BTU (energy content) of gases, optimization of separator conditions for liquid yield, and characterization of an EOS for compositional simulation. Differential liberation and constant volume depletion experiments are designed to provide quantitative information about the volumetric behavior of oil and gas condensate reservoirs during pressure depletion. The multistage separator test is used together with differential liberation and constant volume depletion data to calculate black oil properties ''R''_s, ''B''_o, ''B''_g, and ''r''_s. Multicontact gas injection experiments provide important volumetric and compositional data that can be used to “tune” an equation of state (or alternative) model for simulation of gas injection processes.

Compositional analyses are used to describe the reservoir fluid makeup on a component basis, including calculation of British thermal unit (BTU) (energy content) of gases, optimization of separator conditions for liquid yield, and characterization of an EOS for compositional simulation. Differential liberation and constant volume depletion experiments are designed to provide quantitative information about the volumetric behavior of oil and gas condensate reservoirs during pressure depletion. The multistage separator test is used together with differential liberation and constant volume depletion data to calculate black oil properties ''R''_s, ''B''_o, ''B''_g, and ''r''_s. Multicontact gas injection experiments provide important volumetric and compositional data that can be used to “tune” an equation of state (or alternative) model for simulation of gas injection processes.

==See also==

==See also==