Page 367 - Reservoir Formation Damage

Inorganic Scaling and Geochemical Formation Damage 347

Table 13-1
Ionic Species Concentrations (mg/L) of the
Jo Mill Unit Reservoir Waters*

Mule
Shoe Canyon
Ionic JMU JMU JMU JMU JMU Ranch Reef
Species #7234 #7231 #6234 #1333 #2433 Water Water

Na + 58650 60430 57340 58140 54950 1862 52600
Ca +2 2847 3037 2864 2890 2854 42 4617
+2
Mg 663 753 693 779 736 19 980
+
K 962 412 994 300 964 14 538
Ba +2 2.41 2.18 2.2 3.5 1.95 0.03 0.75
Sr +2 780 812 788 828 761 1.7 301
Total Fe 10.3 0.16 20.7 <0.03 1.14 <0.03 11.6
Total Al 0.5 0.6 0.5 0.6 .05 0.07 0.7
cr 106400 110000 99500 105500 94000 1450 94500
Br 835 892 788 902 793 5.3 4.52
so 4- 2 283 246 364 161 265 1669 689
2
C0 3~ 0 0 0 0 0 16 0
240 240 73 220 293 484 134
HCO 3
H 4Si0 4° 2.2 4.3 1.7 3.7 2.4 3.6 2.8
pH 6.83 7.23 6.97 7.56 7.21 8.41 7.09
TDS 170837 175932 162639 168822 154826 5559 154370
Tartarate ND ND ND ND ND ND ND
Malonate ND ND ND ND ND ND ND
Succinate 24.6 26.2 21.5 22.1 19.3 ND 15.1
Glycolate ND ND ND ND ND ND ND
Formate 23.3 8.3 28.9 5.5 7.7 ND 8.4
Acetate 304 290 313 195 326 ND 36.1
Propianate 22 8.9 18.6 ND 22.5 ND ND
Butyrate 5.7 5.4 ND ND 6.3 ND <3.0
Oxalate ND <3.0 <3.0 ND ND <3.0 ND
* After Schneider, ©1997; reprinted by permission of G. W. Schneider.
ND: Not determined

content and, therefore, higher alkalinity than the other waters
reported in Table 13-1. He used the SOLMINEQ.88 program and simu-
lated the consequences of mixing the JMU #7231 connate water with 10%
volume increments of the Mule Shoe Ranch and Canyon Reef waters.
Schneider (1997) constructed an illite-chlorite mineral stability chart based
on the following reaction equation with proper stoichiometric coefficients
for the Rotliegendes illite formula: