Volumetric flowrate of the dry gas measured at separator

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 gas sandface flowrate  $//<![CDATA[ \begin{array}{l}q_g\end{array} //]]>$ is related to surface flowrates of crude oil  $//<![CDATA[ \begin{array}{l}q_O\end{array} //]]>$ and natural gas  $//<![CDATA[ \begin{array}{l}q_G\end{array} //]]>$ as:

where

It simplifies for gas reservoir with surface flow rate $//<![CDATA[ \begin{array}{l}q_G\end{array} //]]>$ and gas formation volume factor  $//<![CDATA[ \begin{array}{l}B_g\end{array} //]]>$ to:

See also

Non-linear multi-phase diffusion derivation @model