{HEAD ~ Data} obtained from pressure and {TAIL ~ flow rate} for test and reference fluids are used to calculate percent change in permeability and actual permeability using Darcys Law 
obtained from
{ HEAD ~ Data } obtained from pressure and { TAIL ~ flow rate } for test and reference fluids are used to calculate percent change in permeability and actual permeability using Darcys Law
HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH