@wikipedia
Stationary flow when with reservoir and fluid staying at quasistatic equilibrium and fluid pressure and temperature across reservoir do are not change changing in time:
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p(t, {\bf r}) = p({\rmbf constr}) |
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T(t, {\bf r}) = \rm const |
This automatically implies that fluid density also stay constant as soon as the flow is in thermodynamic quasistatic equilibrium:
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\rho(t, T({\bf r}) = \rm const |
Well production or injection resulting in steady state flow is characterised by:
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