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