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Ratio of gas production rate q_G to oil production rate q_O:

(1) Y_G={\rm GOR}=\frac{q_G}{q_O}

The simplest way to model the GOR in a given well is the GOR Fractional Flow @model:

(2) Y_G = {\rm GOR}= R_s + \frac{M_{rg}}{M_{ro}} \cdot \frac{B_o}{B_g}

which provides a good estimate when the drawdown is much higher than delta pressure from gravity and capillary effects.

See Also

Petroleum Industry / Upstream / Subsurface E&P Disciplines / Well Testing (WT) / Flowrate Testing / Flowrate

Well & Reservoir Surveillance ]

Surface flowrates ] [ Oil surface flowrate ] [ Gas surface flowrate ] [ Water surface flowrate ] 

GOR Fractional Flow @model ] [ Production Water Cut (Yw) ]

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