Petroleum Reservoir - Well Test Analysis
In the analysis of well test data,
Is it fair - to extend the applicability of the total compressibility associated with the diffusivity constant
in describing the diffusivity equation (in radial fluid flow)
in a porous medium
to describe the multi-phase fluid flow?
Does it NOT strictly represent
the compressibility of any immobile fluid
that may be present in the reservoir
along with the (single-phase) fluid
that is flowing within the reservoir?