Page 275 - Geochemistry of Oil Field Waters

SULIN’S CLASSIFICATION 25 9

TABLE 8.1
Sulin’s method of water characterization
_____
Na/Cl > 1

(Na+ - C1-) (Na+ - C1-) >
Sulfate-sodium type: <1 Bicarbonate-sodium type:
so,, -2 so4 -2
Bicarbonate group Bicarbonate group
class A2 class A1
calcium subgroup sodium subgroup
magnesium subgroup class A2
Sulfate group calcium subgroup
class S1 magnesium subgroup
calcium subgroup sodium subgroup
magnesium subgroup class S1
sodium subgroup sodium subgroup
class Sp Sulfate group
calcium subgroup class S1
magnesium subgroup sodium subgroup
Chloride group Chloride group
class S1 class S1
calcium subgroup sodium subgroup
magnesium subgroup
sodium subgroup

Na/Cl < 1
(C1-- Na+) (Cl- - Na+) >
Chloride-magnesium type: < 1 Chloride-calcium type:
Mg+’ Mg+2

Bicarbonate group Bicarbonate group
class Aq class A2
calcium subgroup calcium subgroup
magnesium subgroup magnesium subgroup
Sulfate group Sulfate group
class s1 class S1
calcium subgroup calcium subgroup
magnesium subgroup magnesium subgroup
class S2 class s2
calcium subgroup calcium subgroup
magnesium subgroup magnesium subgroup
Chloride group Chloride group
class S1 class S1
calcium subgroup calcium subgroup
magnesium subgroup magnesium subgroup
sodium subgroup sodium subgroup
class S2 class s2
calcium subgroup calcium subgroup
magnesium subgroup magnesium subgroup