Page 216 - Petrophysics 2E

PERMEABILITY-POROSITY RELATIONSHIPS 189

TABLE 3.15
RESERVOIR PERMEABILITY DATA [55]

Well No. 8 Well No. 11 Well No. 18 Well No. 37
Depth Perm Depth Perm Depth Perm Depth Perm
(W (mD) (W (mD) (fit) (mD) (W (mD)

1,917.5* 11 1,9065 10 1,973.5 20 1,922.5 34
1,918.5 27 1,907.5 52 1,974.5 40 1,923.5 67
1,919.5 157 1,908.5 276 1,975.5 190 1,924.5 20
1,920.5 234 1,909.5 140 1,976.5 146 1,925.5 197
1,921.5 390 1,910.5 139 1,977.5 53 1,926.5 186
1,922.5 90 1,911.5 165 1,976.5 4.8 1,927.5 33
1,923.5 192 1,912.5 342 1,979.5 0.0 1,928.5 30
1,924.5 218 1,913.5 87 1,980.5 45 1,929.5 21
1,925.5 42 1,914.5 0.0 1,981.5 14 1,930.5 117
1,926.5 120 1,915.5 0.0 1,982.5 0.0 1,931.5 27
1,927.5 158 - - 1,983.5 84 1,932.5 27
1,928.5 315 - - 1,984.5 28 1,933.5 26
1,929.5 20 - - 1,985.5 0.0 1,934.5 61
1,930.5 99 - - 1,986.5 0.0 - -
1,93 1.5 121 - - 1,987.5 0.0 - -
1,932.5 43 - - 1,988.5 0.0 - -
1,933.5 88 - - - - - -
1,934.5 7.4 - - - - - -
1,935.5 149 - - - - - -
1.936.5 0.0 - - - - - -
"Top of the productive interval.

SOLUTION

To illustrate the zonation of individual wells, the permeability data
of well No. 11 were selected. Table 3.16 shows the division of the
permeability data into two zones. Equations 3.132, 3.133, and 3.134
were used to compute the variance factors szz and sz and the zonation
index Iz, respectively, for each division into two zones. For example, the
szz, sz and I, values in the first line of Table 3.15 (Le., depth = 1,917.5 ft
and k = 10 mD) are computed as follows: