Abstract Estimation of gas solubility in a brine solution is essential for many chemical/petroleum industrial applications including EOR with gas injection, geological storage of CO2 in deep saline aquifers, mitigation of corrosion related issues for sour gas fields and many more. Since the type of salt can significantly alter the gas-solubility in formation brine, we develop a robust methodology to predict the impact of different types of salts on solubility of a gas in a brine solution. The method uses ionic-strength-based mixing rule and extends the well-known Setschenow relation to capture the impact of mixture of salts containing mono- or multi-valent ions. The model is validated with new experimental solubility measurements of a novel gas (dimethyl either) in brine with various salt mixtures. In addition, the unique/characteristic constants used in model for each component (gas, anions and cations) are correlated with their thermodynamic properties and can easily be obtained for novel gas-salt systems.

中文翻译：

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预测含单一盐或混合盐的盐水溶液中的气体溶解度：在注气和 CO2 捕获/封存中的应用

摘要 估计气体在盐水溶液中的溶解度对于许多化学/石油工业应用至关重要，包括注气 EOR、深层咸水层中 CO2 的地质储存、缓解酸性气田的腐蚀相关问题等等。由于盐的类型可以显着改变地层盐水中的气体溶解度，我们开发了一种稳健的方法来预测不同类型的盐对气体在盐水溶液中的溶解度的影响。该方法使用基于离子强度的混合规则，并扩展了众所周知的 Setschnow 关系以捕获包含单价或多价离子的盐混合物的影响。该模型通过新气体（二甲基任一）在盐水中与各种盐混合物的新实验溶解度测量进行了验证。此外，