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Characterization of Reservoir Rock 113
Calcium ions in solution, meq/L
Figure 6-4. Calcium-sodium ion-exchange isotherms (circles = kaolinite,
squares = montmorillonite, open figures = 20°C, and closed figures = 70°C)
(Reprinted from Journal of Petroleum Science and Engineering, Vol. 15,
Kleven, R., and Alstad, J., "Interaction of Alkali, Alkaline-Earth and Sulphate
Ions with Clay Minerals and Sedimentary Rocks," pp. 181-200, ©1996, with
permission from Elsevier Science).
14
12
S 10
10 20 30 40
Barium Ions In solution, meq/L
Figure 6-5. Barium-sodium ion-exchange isotherms (circles = kaolinite,
squares = montmorillonite, open figures = 20°C, and closed figures = 70°C)
(Reprinted from Journal of Petroleum Science and Engineering, Vol. 15,
Kleven, R., and Alstad, J., "Interaction of Alkali, Alkaline-Earth and Sulphate
Ions with Clay Minerals and Sedimentary Rocks," pp. 181-200, ©1996, with
permission from Elsevier Science).
