Parametric Study of Carbon Dioxide Sequestration in Deep Saline Aquifers
Parametric Study of Carbon Dioxide Sequestration in Deep Saline Aquifers
复制标题
深层咸水层二氧化碳封存的参数研究
DOI：
10.1080/15567030802087403
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
F. Gumrah
中科院分区：
文献类型：
--
作者：
B. Basbug;F. Gumrah
利用基于单井含水层模型的组分商业模拟器对深层盐渍含水层中CO2的封存进行了模拟，该模拟器用于分析CO2在超临界和气态条件下的长时间注入和储存过程。研究了控制参数包括垂向与水平向渗透率比、含水层压力、注水量对等温注水和封存过程的影响，并进行了相应的敏感性分析。这一参数研究的结果表明，这些可控参数对CO2封存过程有重要影响，应对其进行优化，以便在深层咸水含水层进行有效的封存过程。研究表明，垂直/水平渗透率比(KV/Kh)和初始压力条件是影响各含水层注入井区自由CO2饱和度的最主要参数，而中下层的自由CO2饱和度受CO2注入速度的影响较大。这可以归因于Kv/kh比值的增大导致表层自由CO2饱和度的增加，而中下层Kv/kh比值的增大导致自由CO2饱和度的降低，这是由于自由CO2的上升趋势。
Abstract CO2 sequestration in a deep saline aquifer was simulated using a compositional commercial simulator based on a single-well aquifer model, which was developed to analyze the injection and storage process of CO2 under supercritical and gaseous conditions for long periods of time. The influence of controlling parameters including vertical to horizontal permeability ratio, aquifer pressure, injection rate on the isothermal injection, and sequestration processes were investigated and the sensitivity analysis corresponding to those processes was performed. The results of this parametric study showed that these controllable parameters have a significant influence on CO2 sequestration process and should be well optimized for effective sequestration processes in a deep saline aquifer. The present study indicated that vertical to horizontal permeability ratio (kv/kh) and initial pressure conditions were the most dominating parameters affecting the free CO2 saturation at the injection well block in each layer of the aquifer; whereas, free CO2 saturation level in the middle and bottom layers was strongly affected by CO2 injection rate. This can be attributed to the fact that an increase in kv/kh ratio caused an increase in free CO2 saturation level in top layer; whereas, free CO2 saturation level decreased with an increase in kv/kh ratio in the middle and bottom layers due to the high tendency of free CO2 to rise up.