Black Oil (fluid model)

PVT model based on three pseudo-components   $//<![CDATA[ \begin{array}{l}C = \{ W, O, G \}\end{array} //]]>$:

$//<![CDATA[ \begin{array}{l}W\end{array} //]]>$ – water substance with minerals  (assuming formation water and injection water composition is the same)

$//<![CDATA[ \begin{array}{l}O\end{array} //]]>$ –  dead oil pseudo-component 

$//<![CDATA[ \begin{array}{l}G\end{array} //]]>$ – natural gas pseudo-component

existing in three possible phases $//<![CDATA[ \begin{array}{l}\alpha = \{ w, o, g \}\end{array} //]]>$:

$//<![CDATA[ \begin{array}{l}w\end{array} //]]>$ – water phase, consisting of water component only

$//<![CDATA[ \begin{array}{l}o\end{array} //]]>$ –  oil phase, consisting of dead oil pseudo-component and dissolved natural gas pseudo-component (called solution gas)

$//<![CDATA[ \begin{array}{l}g\end{array} //]]>$ – gas phase, consisting of natural gas pseudo-component only

 A simplified version of Modified Black Oil model without volatile oil  $//<![CDATA[ \begin{array}{l}R_v =0\end{array} //]]>$.

The accountable cross-phase exchanges are illustrated in the table below: