Page 34 - Reservoir Formation Damage
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18 Reservoir Formation Damage
CALCIUM MONTMORILLONITE
It
SODIUM MONTMORILLONITE
SODIUM OR CALCIUM
MONTMORILLONITE
Figure 2-6. Expansion of the calcium and sodium montmorillonite by
hydration (after Magcobar, ©1972, Fig. 2, p. 2; reprinted by permission of
the M-l L.L.C.).
Figure 2-7. Effect of the cation size on the cation migration into a clay
interlayer (modified after Baroid Mud Handbook, 1975, Fig. 12, p. 21;
reprinted by permission of Baroid Drilling Fluids, Inc.).
