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 q_G is related to gas sandface flowrate q_g and oil sandface flowrate q_o as (see derivation):
| (1) | q_G =(1-R_v \, R_s)^{-1} \left( \frac{q_g}{B_g} +\frac{R_s \, q_o}{B_o} \right) |
where
B_o, B_g | oil formation volume factor between separator and sandface pressure/temperature conditions |
R_s | Solution GOR at sandface pressure/temperature conditions |
It relates to Liquid production rate at surface as:
| (2) | q_G = GOR \cdot (1-Y_w) \, q_L |
It simplifies for the Black Oil model to:
| (3) | q_G =\frac{q_g}{B_g} +\frac{R_s \, q_o}{B_o} |
See Also
Petroleum Industry / Upstream / Subsurface E&P Disciplines / Well Testing (WT) / Flowrate Testing / Flowrate
[ Well & Reservoir Surveillance ]
[ Sandface flowrates ] [ Oil sandface flowrate ] [ Gas sandface flowrate ] [ Water sandface flowrate ]
[ Surface flowrates ] [ Oil surface flowrate ] [ Gas surface flowrate ] [ Water surface flowrate ]
[ Natural Gas ]