tech schlumberger charts 07 cp 4-20!4!33.p2
TRANSCRIPT
Crossplots for Porosity, Lithology and SaturationSchlumberger
4-21
CP
On Chart CP-8a, the APS apparent limestone porosity (APLC)replaces the CNL* apparent limestone porosity (NPHI) used onChart CP-8.
Since there is negligible dolomite spread, a single dolomitepoint is plotted for each mud.
1.1
1.0
0.9
0.8
0.7
0.6
0.5
Approximate shale region
Anhydrite
Dolomite
Gypsum
Calcite (limestone)
vma = 5943 m/sec = 19,500 ft/sec
vma = 5486 m/sec = 18,000 ft/sec
Sulfur
Quartz sandstone
12 3&4
Secondary porosity
Gas
orsa
lt
N
M
0.3 0.4 0.5 0.6 0.7 0.8
Fresh mud ρf = 1.0 Mg/m3, t f = 620 µsec/m ρf = 1.0 g/cm3, t f = 189 µsec/ft
Salt mud ρf = 1.1 Mg/m3, t f = 607 µsec/m ρf = 1.1 g/cm3, t f = 185 µsec/ft
*Mark of Schlumberger© Schlumberger
M-N Plot for Mineral IdentificationFor APS curves that have been environmentally corrected CP-8a