Gas Formation Volume Factor Formula |
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\( G_f \;=\; \dfrac{ 0.02827 \cdot z \cdot T }{ p }\) (Gas Formation Volume Factor) \( z \;=\; \dfrac{ G_f \cdot p }{ 0.02827 \cdot T }\) \( T \;=\; \dfrac{ G_f \cdot p }{ 0.02827 \cdot z }\) \( p \;=\; \dfrac{ 0.02827 \cdot z \cdot T }{ G_f }\) |
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| Symbol | English | Metric |
| \( G_f \) = Gas Formation Volume Factor | \(RB \;/\; SCF\) | - |
| \( z \) = Gas Deviation Factor | \(dimensionless\) | - |
| \( T \) = Temperature | \(R\) | - |
| \( p \) = Pressure (psi) | \(lbf \;/\; in^2\) | - |
Gas formation volume factor, abbreviated as \(G_f\), is the volume of gas at reservoir conditions (high pressure and high temperature) to the volume of gas at standard conditions (usually 14.7 psi and 60°F). It is a measure of how much a gas expands or contracts when brought from reservoir conditions to the surface.
These conversion factors used in the calculations of the \(G_f\) when 0.005032 is expressed in reservoir cubic feet per standard cubic foot (RCF/SCF) and when 0.02827 is expressed in reservoir barrels per standard cubic foot (RB/SCF).
Gas Formation Volume Factor Formula |
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\( G_f \;=\; \dfrac{ 0.005032 \cdot z \cdot T }{ p }\) (Gas Formation Volume Factor) \( z \;=\; \dfrac{ G_f \cdot p }{ 0.005032 \cdot T }\) \( T \;=\; \dfrac{ G_f \cdot p }{ 0.005032 \cdot z }\) \( p \;=\; \dfrac{ 0.005032 \cdot z \cdot T }{ G_f }\) |
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| Symbol | English | Metric |
| \( G_f \) = Gas Formation Volume Factor | \(RCF \;/\; SCF\) | - |
| \( z \) = Gas Deviation Factor | \(dimensionless\) | - |
| \( T \) = Temperature | \(R\) | - |
| \( p \) = Pressure (psi) | \(lbf \;/\; in^2\) | - |