1.
n. [Formation Evaluation]
Display ranges chosen for the density and neutron
porosity logs such that the two curves will overlay at all porosity values providing the
matrix is pure
quartz and the pores are filled with
fresh water. The most common overlay spans two tracks, with the density reading from 1.9 to 2.9 g/cm
3, and the neutron in
sandstone porosity units from 0.45 to −0.15 vol/vol.