Page 99 - Basic Well Log Analysis for Geologist

POR OSTTY LOGS

POROSITY AND LITHOLOGY DETERMINATION FROM
FORMATION DENSITY LOG AND
COMPENSATED NEUTRON LOG (CNL)

FRESH WATER, LIQUID-FILLED HOLES

POROSITY

gm/cc LIMESTONE

DENSITY APPARENT

BULK LOG

Ph DENSITY

30
10 20 © 1972 Schlumberger 40
CNL NEUTRON INDEX (oyi)¢ (APPARENT LIMESTONE POROSITY)

84