Salt effect on the CO2-H2O isotopic exchange equilibration
An experimental study to understand the salt effect on the kinetics ofCO2-H2O isotopic exchange equilibrium is presented. Two water samples of the same oxygen isotopic composition were prepared from distilled water: (i) the pure distilled water and (ii) a saturated salt solution obtained by dissolving an excess of dry NaCl. The equilibration time for the salt solution sample is approximately three times greater than that for the distilled water. Thus, the measurement of δ18O in high saline waters like petroleum waters must be performed by equilibrating CO2 and H2O for a minimum of 24 hours with continuous agitation. There is still a need to conduct systematic studies for elucidating the effects of other parameters, such as alkalinity, buffering capacity,pH, and amount of total dissolved CO2 on the oxygen isotopic exchange equilibrium.
M.P.Verma
Geotermia, Instituto de Investigaciones Electricas, Cuernavaca, Morelos, México
国际会议
第十二届水-岩相互作用国际研讨会(P0roceedings of the 12th International Symposium on Water-Rock Interaction)
昆明
英文
805-806
2007-07-31（万方平台首次上网日期，不代表论文的发表时间）