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Line 100: + + − Equation of state for gas can be express by − PV =nRT − PV= znRT+ − − − ===<big>Specific Gravity</big><big></big>=== + + − [[File:Formula8.png|200px|thumbnail|center]]+ − − − −
→Physical Properties of Gas
==Physical Properties of Gas==
==Physical Properties of Gas==
Equation of state for gas can be express by
: <math>\text{PV = nRT}</math>
Where P is a pressure in psia, V is volume, mole content is n, R is universal constant with gas is 10.73, and T is temperature in reamur. In a atmosphere condition gas have compressible characteristic than ideal gas. The amount of gas deviations stated in deviation factor z (supercompressibility factor), so :
Where P is a pressure in psia, V is volume, mole content is n, R is universal constant with gas is 10.73, and T is temperature in reamur. In a atmosphere condition gas have compressible characteristic than ideal gas. The amount of gas deviations stated in deviation factor z (supercompressibility factor), so :
: <math>\text{PV = znRT}</math>
===Specific Gravity===
Specific gravity defined by the rate of gas density in a pressure and temperature sub surface by gas density in equal temperature and pressure (usually in surface). </ref><ref name=Wicaksono2015> Wicaksono. 2015. ''Reservoir Hydrocarbon''. AAPG Short Course: Brawijaya University.</ref>
Specific gravity defined by the rate of gas density in a pressure and temperature sub surface by gas density in equal temperature and pressure (usually in surface). </ref><ref name=Wicaksono2015> Wicaksono. 2015. ''Reservoir Hydrocarbon''. AAPG Short Course: Brawijaya University.</ref>
: <math>\gamma_g = \frac{MW}{28.97}</math>
===Gas Formation Volume Factor===
===<big>Gas Formation Volume Factor</big> <big></big>===
Formation Volume Factor is ratio between gas volume in reservoir condition by standard condition. For gas volume formation is: <ref name=Wicaksono2015 />
Formation Volume Factor is ratio between gas volume in reservoir condition by standard condition. For gas volume formation is: <ref name=Wicaksono2015 />
[[File:Formulae9.png|350px|thumbnail|center]]
[[File:Formulae9.png|350px|thumbnail|center]]