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Produced or injected flowrate of natural gas across the well-reservoir contact with the volumes measured at the sandface temperature and pressure conditions.


For volatile oil fluid model the For MBO fluid @model the gas sandface flowrate 

LaTeX Math Inline
bodyq_g
is related to surface flowrates of crude oil 
LaTeX Math Inline
bodyq_O
 and natural gas 
LaTeX Math Inline
bodyq_G
 as as (see derivation):

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anchor1
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q_g = \frac{B_g \,cdot ( q_G - R_s \, q_O)
}{1- R_v \, R_s}

where

LaTeX Math Inline
bodyB_o, \, B_g

gas formation volume factor between separator and sandface pressure/temperature conditions

LaTeX Math Inline
bodyR_s

Solution GOR at sandface pressure/temperature conditions



It simplifies for gas reservoir simplifies for Dry Gas Reservoir with surface flow rate

LaTeX Math Inline
bodyq_G
 and gas formation volume factor 
LaTeX Math Inline
bodyB_g
 to:

LaTeX Math Block
anchorVKDEW
alignmentleft
q_g = q_G \cdot B_g


See

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Also

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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 ]Non-linear multi-phase diffusion derivation @model