Page 231 - Geochemistry of Oil Field Waters

218 ORIGIN OF OILFIELD WATERS

TABLE 7.XI
Silurian system - highest concentration of a constituent found, average concentration,
and number of samples analyzed

Constituent Concentration (mg/l) Number of samples
highest average
-
Lithium 90 37 8
Sodium 89,000 49,100 14
Potassium 8,400 1,900 11
Rubidium 8 4 2
Cesium 0.4 0.4 2
Calcium 41,000 21,000 14
Magnesium 12,000 4,300 12
Strontium 880 7 30 2
Barium 15 15 1
Boron 90 30 10
Chloride 195,000 122,000 14
Bromide 1,700 520 11
Iodide 30 17 10
Bicarbonate 27 0 115 11
Sulfate 3,500 830 13
Organic acid
as acetic 220 90 9
Ammonium 20 0 80 10
TABLE 7.XII

Ordovician system - highest concentration of a constituent found, average concentration,
and number of samples analyzed

Constituent Concentration (mg/l) Number of samples
highest average

Lithium 70 20 15
Sodium 89,100 31,000 609
Potassium 2,890 990 15
Rubidium 6 2 11
Cesium 0.5 0.2 9
Calcium 39,000 6,100 609
Magnesium 10,900 1,300 607
Strontium 900 340 12
Barium 10 6 10
Boron 80 20 18
Manganese 56 56 1
Chloride 205,600 62,000 609
Bromide 7 20 300 19
Iodide 70 25 16
Bicarbonate 2,260 270 598
Carbonate 60 25 26
Sulfate 7,600 1,070 583
Organic acid
as acetic 3,300 5 20 14
Ammonium 630 140 16