Formation Evaluation Through Casing - Cased-Hole Log Analysis and Reservoir Performance Monitoring - page 184

Table 11.9 (continued)

K (%) U (ppm) Th (ppm)

Biotite 6.7-8.3 <0.01

Muscovite 7.9-9.8 <0.01

Diabase, Va. <1.0 <1.0 2.4

Diorite, quartzodiorite 1.1 2.0 8.5

Dunite, Wa. <0.02 <0.01 <0.01

Feldspars

Plagioclase 0.54 <0.01

Orthoclase 11.8-14.0 <0.01

Microcline 10.9 <0.01

Gabbro (mafic igneous) 0.46-0.58 0.84-0.9 2.7-3.85

Granite (silic igneous)
Rhode Island

2.7-4.26 3.6-4.7 19-20

New Hampshire 4.5-5 4.2 25-52

Precambrian (Okla.) 3.5-5 12-16 50-62

Minnesota, (Col. Tex.) 2-6 3.2-4.6 14-27

Grandodiorite 2-2.5 2.6 9.3-11

Colorado, Idaho 5.5 2-2.5 11.0-12.1

Oil shales, Colorado <4.0 up to 500 1-30

Periodite 0.2 0.01 0.05

Phosphates 100-350 1-5

Rhyolite 4.2 5

Sandstones, range (av.) 0.7-3.8 (1.1) 0.2-0.6 (0.5) 0.7-2.0 (1.7)

Silica, quartz, quartzite, (pure) <0.15 <0.4 <0.2

Beach Sands, Gulf Coast <1.2 0.84 2.8

Atlantic Coast (Fla., N.C.) 0.37 3.97 11.27

Atlantic Coast (N.J., Mass.) 0.3 0.8 2.07

Shales

“Common” shales [range (av.)] 1.6-4.2 (2.7) 1.5-5.5 (3.7) 8-18 (12.0)

Shales (200 samples) 2.0 6.0 12.0

Schist (biotite) 2.4-4.7 13-25

Syenite 2.7 2,500 1,300

Tuff (feldspatic) 2.04 5.96 1.56