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首页> 外文期刊>Chemical geology >Modelling CO2 solubility in pure water and NaCl-type waters from 0 to 300 degrees C and from 1 to 300 bar - Application to the Utsira Formation at Sleipner
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Modelling CO2 solubility in pure water and NaCl-type waters from 0 to 300 degrees C and from 1 to 300 bar - Application to the Utsira Formation at Sleipner

机译：模拟纯净水和0至300摄氏度和1至300巴的NaCl型水中的CO2溶解度-在Sleipner的Utsira地层中的应用

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摘要

The goal of this study is to better quantify the solubility of CO2 in brines. New experimental data on the solubility of CO2 in a mixed salt solution at CO2 sequestration pressure and temperature conditions are presented. A thermodynamic model for calculation of the phase equilibria of CO2-H2O-NaCl system is briefly described; notably, the solubility of the carbon dioxide in the aqueous phase. This model was used to check his validity by comparing the calculation results with new experimental measurements, available experimental observations and other models CO2 solubility results. Comparison with experimental data indicates that the model can predict accurately CO2 solubility in pure water and in aqueous NaCl solutions of ionic strengths up to 3 molal from 0 to 300 degrees C and from 1 to 300 bar. This model has been applied to CO2 storage at Sleipner, North Sea. The salinity of the porewater within the Utsira Formation (the CO2 host formation) is approximately the same as seawater. Predicted CO2 solubility is in good agreement with new experimental measurements. (c) 2004 Published by Elsevier B.V.
机译：这项研究的目的是更好地量化二氧化碳在盐水中的溶解度。提出了关于在二氧化碳固存压力和温度条件下二氧化碳在混合盐溶液中的溶解度的新实验数据。简要描述了用于计算CO2-H2O-NaCl体系相平衡的热力学模型;值得注意的是，二氧化碳在水相中的溶解度。通过将计算结果与新的实验测量结果，可用的实验观察结果以及其他模型的CO2溶解度结果进行比较，该模型用于检查其有效性。与实验数据的比较表明，该模型可以准确预测在0至300摄氏度和1至300巴的离子强度最高达3摩尔的纯水和NaCl水溶液中的CO2溶解度。该模型已应用于北海Sleipner的二氧化碳封存。 Utsira地层（CO2主体地层）内孔隙水的盐度与海水大致相同。预测的CO2溶解度与新的实验测量结果非常吻合。 （c）2004年由Elsevier B.V.

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