Neutron/Density/Sonic Crossplot
INPUTS	Schlumberger/Gearhart Halliburton/Dresser
	Compensated Sidewall
	Limestone matrix Sandstone matrix Dolomite matrix
	Neutron log %porosity =
	Common densities Sandstone: 2.65*-2.68 Limestone: 2.71 Dolomite: 2.78-2.87* *more common value
	Matrix bulk density =	Zone bulk density =
	Fluid bulk density =	Fresh mud: 1 Salt mud: 1.1
	Option: leave zone's bulk density blank and enter Density log %porosity directly: Enter Density %porosity =
	Common travel times (micro-sec/ft) Sandstone: 55.6 Limestone: 47.5 Dolomite: 43.5 (X3.28 for micro-sec/m)
	Matrix travel time =	Log travel time =
	Fluid travel time =	Drilling mud: 189
	To calculate a composition, select THREE (3) end members from these choices: Primary:   Quartz   Calcite   Dolomite Evaporites:   Anhydrite   Gypsum   Halite Clays:   Kaolinite   Illite   Chlorite   Montmorillonite/Smectite   Metals & solid hydrocarbons:   Hematite   Pyrite   Bituminous coal   Anthracite coal/asphalt/pyrobitumen
SHALE CORR	No correction Shale correction
	Old rocks Tertiary rocks
	Compacted Uncompacted
	Gamma-ray in clean zone =	Gamma-ray in shale =
	Gamma-ray in zone of interest =	Shale travel time =
	Shale neutron %porosity =	Shale's bulk density =
	Option: leave shale bulk density blank and enter shale density %porosity directly: Enter shale density %porosity =
RESULTS	Gamma-ray index =	Volume% of shale =
	%Neutron corr LS porosity =
	%Density log corr LS porosity =
	%Sonic log corr LS porosity =
	Crossplot Results End Member Percentage %XPorosity=