Page 287 - Origin and Prediction of Abnormal Formation Pressures

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Variation in the concentration of various components in solutions expelled from srnectite clay saturated with seawater (after Chilingarian et al., 1973, table 1, p.
Expelled solutions
Fraction No.: E B 4 V IV 111 I1 I ? Cumulative % 59.0 49.5 34.5 25.5 16.5 volume, cm3: E r 60 5 620 580 560 460 644 4 rn 754 657 669 557 0 13,200 13,300 12,800 13,200 13,400 8 160 206 206 216 226 262 9 m 128 165 189 165 4,610 5,270
supernatant fluid 60 5 572 13,400 210 165 4,610 19,310 20 3 3,750 24 5 15 14 38,804

Concentration, mg/l seawater 690 1,189 10,116 400 520 2,759 18,929 3 34 6,612 - - 43 4 34,423

TABLE 10-9 395) Ion ca2+ Mg2+ Na + K+ HCO, SO:- C1- F- NO, CaC03 ~e~+ Mn2' Si02 B~+ Total dissolved solids