Page 299 - Geology and Geochemistry of Oil and Gas

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TABLE 11.11 MODELS

DYNAMIC
Numerical values of factors determining the degree of compaction
Factor Normalized scale (T I ) GEOLOGIC
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
Scales of absolute values of factors

Absolute geological age, A t (My) 0 50 100 150 200 250 300 350 400 450 500 SYSTEMS
Dynamic deformation, N (tectonic-strat. unit) 0.73 0.85 1.00 1.17 1.37 1.60 1.88 2.20 2.58 3.01 3.53
Depth of burial, D (km) 0 0.6 1.2 1.8 2.4 3.0 3.6 4.2 4.8 5.4 6.0
Formation temperature, T (1C) 0 20 40 60 80 100 120 140 160 180 200
Rate of sedimentation, R d (m/My) 20 30 50 80 100 200 300 500 800 1,000 2,000
Content of quartz in sandstones, Q (wt%) 100 90 80 70 60 50 40 30 20 10 0
Content of smectites in clays, M (wt%) 0 5 10 15 20 25 30 35 40 45 50
Cementation index, C (wt%) 0 3 6 9 12 15 18 21 24 27 30
1 2 3 4 5 6 7 8 9 10 —
Sorting of sandstones, S ss
— 10 9 8 7 6 5 4 3 2 1
Sorting of shales, S sh
0 1 2 3 4 5 6 7 8 9 10
Homogeneity of carbonates, S cr 261