| Oil isothermal compressibility | co | psi-1 | p > pb |
|---|
where
| psia | Fluid pressure | |
| °F | Initial formation temperature | |
| API | Oil API gravity | |
| frac | Oil specific gravity | |
| frac | Gas specific gravity | |
| scf/stb | Gas Solubility at Bubble point pressure |
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[ Vasquez-Beggs (1980) oil correlations ]