Changes

===Analytical methods===

===Analytical methods===

<gallery mode=packed heights=300px widths=300px>

<gallery mode=packed heights=300px widths=300px>

oilfield-water-analysis_fig1.png|{{figure number|1}}Triangular plot showing relative amounts of cations in typical oil field brines. Relative amount of sodium changes, but calcium is always about five times magnesium. (After Dickey.<ref name=pt05r46>Dickey, P. A., 1966, [http://archives.datapages.com/data/bulletns/1965-67/data/pg/0050/0011/2450/2472.htm Patterns of chemical composition of deep subsurface waters: AAPG Bulletin, v. ]50, p. 2472–2478.</ref>)

oilfield-water-analysis_fig1.png|{{figure number|1}}Triangular plot showing relative amounts of cations in typical oil field brines. Relative amount of sodium changes, but calcium is always about five times magnesium. (After Dickey.<ref name=pt05r46>Dickey, P. A., 1966, [http://archives.datapages.com/data/bulletns/1965-67/data/pg/0050/0011/2450/2472.htm Patterns of chemical composition of deep subsurface waters: AAPG Bulletin], v. 50, p. 2472–2478.</ref>)

file:oilfield-water-analysis_fig2.png|{{figure number|2}}Stiff<ref name=pt05r149 /> diagrams used to show water compositions on maps.

file:oilfield-water-analysis_fig2.png|{{figure number|2}}Stiff<ref name=pt05r149 /> diagrams used to show water compositions on maps.

</gallery>

</gallery>

| Mg²⁺ || 0.0823 || 1,500 || 123 || 6 || 7 || 0.6 || 0.5

| Mg²⁺ || 0.0823 || 1,500 || 123 || 6 || 7 || 0.6 || 0.5

|-

|-

| '''Total cations''' || || || '''2590''' || '''100''' ||  || '''133.8''' || '''100'''

| '''Total cations''' || colspan = 2 | || '''2590''' || '''100''' ||  || '''133.8''' || '''100'''

|-

|-

| Cl^– || 0.0282 || 91,800 || 2589 || 100 || 3240 || 91.4 || 70

| Cl^– || 0.0282 || 91,800 || 2589 || 100 || 3240 || 91.4 || 70

| HCO₃^– || 0.0164 || 34 || 0.5 || — || 1870 || 30.7 || 23.5

| HCO₃^– || 0.0164 || 34 || 0.5 || — || 1870 || 30.7 || 23.5

|-

|-

| '''Total anions''' || || || '''2590''' || '''100''' || || '''130.6''' || '''100.0'''

| '''Total anions''' || colspan = 2 | || '''2590''' || '''100''' || || '''130.6''' || '''100.0'''

|}

|}

[[Category:Laboratory methods]]

[[Category:Laboratory methods]]