Volumetric flowrate of dry gas measured at separator or at processing plant.
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):
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q_G =(1-R_v \, R_s)^{-1} \left( \frac{q_g}{B_g} +\frac{R_s \, q_o}{B_o} \right) |
where
The gas surface flowrate relates to Surface Liquid production rate
as:| LaTeX Math Block |
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q_G = Y_G \cdot (1-Y_w) \, q_L |
The gas surface flowrate relates to Total sandface flowrate
as:| LaTeX Math Block |
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q_G = \frac{ Y_G \cdot (1-Y_W)}{B_w Y_W + \left[ (B_o - R_s B_g) + (B_g - R_v B_o) \, Y_G \right] \cdot (1-Y_W)} \cdot q_t |
It simplifies for the Black Oil model (
) to:
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q_G =\frac{q_g}{B_g} +\frac{R_s \, q_o}{B_o} = Y_G \cdot (1-Y_w) \, q_L = \frac{ Y_G \cdot (1-Y_W)}{B_w Y_W + \left[ (B_o - R_s B_g) + B_g \, Y_G \right] \cdot (1-Y_W)} \cdot q_t |
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 ]
