Page 267 - Geology and Geochemistry of Oil and Gas

TABLE 11.4 MODELS
OF
Correlation coefficients between variables and their accuracy STATIC
Eq. No. Correlation between variables Baku Archipelago and South Apsheron Offshore Zone Lower Kura Depression
N 9r9 s r 3s r N 9r9 s r 3s r

1 f C carb 287 0.192 0.057 0.171 524 0.490 0.033 0.099 GEOLOGIC
2 k– C carb 167 0.390 0.060 0.180 254 0.510 0.016 0.140
3 f– C cl 273 0.473 0.047 0.141 430 0.228 0.046 0.133
4 k– C cl 165 0.442 0.063 0.189 198 0.131 0.062 0.186
5 f– Z cl 282 0.574 0.040 0.120 532 0.541 0.031 0.093 SYSTEMS
6 k– Z cl 162 0.555 0.054 0.162 237 0.570 0.044 0.132
7 k– f 162 0.530 0.057 0.171 252 0.715 0.031 0.093
8 Q 100 – C cl 246 0.610 0.040 0.120 284 0.522 0.043 0.129
9 A da – C cl 163 0.718 0.038 0.114 199 0.256 0.066 0.198
10 Q 100 – Z cl 247 0.626 0.039 0.117 341 0.400 0.045 0.135
11 A da – Z cl 161 0.715 0.039 0.115 252 0.397 0.053 0.159
12 Q 100 – f 243 0.433 0.052 0.156 284 0.381 0.051 0.151
13 A da – f 157 0.631 0.048 0.144 203 0.418 0.058 0.174
14 Q 100 – k 150 0.360 0.071 0.213 151 0.351 0.071 0.213
15 A da – k 99 0.576 0.067 0.201 139 0.468 0.066 0.198
16 Q 100 – A da 157 0.670 0.044 0.132 169 0.408 0.064 0.192
Definitions of variables: N ¼ number of tests; 9r9 ¼ absolute value of correlation coefficient; s r ¼ standard deviation; f ¼ porosity; k ¼ permeability;
C cl ¼ clay cement content; C carb ¼ carbonate cement content; Z cl ¼ relative clay content (Z cl ¼ (1– f)C cl /[(1– f)C cl +f]); Q 100 ¼ cation-exchange capacity;
A da ¼ diffusion–adsorption parameter. 231