Volumetric flowrate of dry gas measured at separator.
Usually produced from subsurface gas phase and oil phase.
It usually requires additional processing before taking commercial form of the Natural Gas.
For volatile oil fluid model the gas surface flowrate is related to gas sandface flowrate
and oil sandface flowrate
as (see derivation):
q_G =(1-R_v \, R_s)^{-1} \left( \frac{q_g}{B_g} +\frac{R_s \, q_o}{B_o} \right) |
where
| oil formation volume factor between separator and sandface pressure/temperature conditions | |
| Solution GOR at sandface pressure/temperature conditions |
It relates to Liquid production rate at surface as:
q_G = GOR \cdot (1-Y_w) \, q_L |
It simplifies for the Black Oil model to:
q_G =\frac{q_g}{B_g} +\frac{R_s \, q_o}{B_o} |
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