Crossplots for Porosity, Lithology and SaturationSchlumberger

4-29

CP

K, potassium concentration (%)

Th/K, thorium/potassium ratio

P e, ph

otoe

lect

ric fa

ctor

P e, ph

otoe

lect

ric fa

ctor

Glauconite

Glauconite

Chlorite

Chlorite

Biotite

Biotite

Illite

Illite

Muscovite

Muscovite

Montmorillonite

Montmorillonite

Kaolinite

Kaolinite

Mixed layer

0 2 4 6 8 10

0.1 0.2 0.3 0.6 1 2 3 6 10 20 30 60 100

10

8

6

4

2

0

10

8

6

4

2

0

*Mark of Schlumberger Schlumberger

Mineral Identification from Litho-Density* Logand NGS* Natural Gamma Ray Spectrometry Log CP-18