Page 301 - Petrophysics 2E

272 PETROPHYSICS: RESERVOIR ROCK PROPERTIES

Figure 4.43. Cation exchange capacity us. porosity for Shannon sand [3ZJ.

TABLE 4.1 0
LABORATORY VALUES OF Q, FRL, AND CEC FOR THE
SHANNON SAND FIELD

Sample No. Q FRL CEC
0.272 8.86 0.042
0.237 9.72 0.055
0.234 11.50 0.055
0.199 13.90 0.064
0.197 12.70 0.064
0.186 14.50 0.067
0.158 12.60 0.072

(1) Calculate Qv and F* for each core. The average grain density (pma)
for the seven samples is 2.65 g/cc.
(2) Determine a* and m*.
(3) Calculate the saturation exponent n*.

SOLUTION

Keelan and McGinley presented a practical procedure for applying
the Waxman-Smits model for calculating reservoir fluid saturations in