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GOR = Y_g = R_s + \frac{M_{rg}}{M_{ro}} \cdot \frac{B_o}{B_g} |
where
| Relative oil |
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| mobility |
| Oil formation volume factor |
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| Relative gas mobility |
| Gas formation volume factor |
| Current formation pressure |
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It provides a good estimate when the drawdown is much higher than delta pressure from gravity and capillary effects.
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s_g(t) = (1-s_{wi}) \cdot {\rm RF}(t)/E_S \cdot (1-s_{wi}) |
See also
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