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