Numerical Modeling of Hydrate Formation in Sand Sediment Simulating Sub-Seabed CO2 Storage in the form of Gas Hydrate
Numerical Modeling of Hydrate Formation in Sand Sediment Simulating Sub-Seabed CO2 Storage in the form of Gas Hydrate
复制标题
沙沉积物中水合物形成的数值模拟模拟海底 CO2 以气体水合物形式储存
DOI：
10.1016/j.egypro.2013.06.526
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
M. Inui
中科院分区：
文献类型：
--
作者：
T. Nakashima;Toru Sato;M. Inui
在多种二氧化碳捕获和储存方法中，我们重点关注海底天然气水合物形式的二氧化碳封存，主要用于日本近海的许多封存地点，并且二氧化碳从沉积物中泄漏的风险很小。然而，由于缺乏相关信息，很难评估这种方法的精确存储潜力和成本。为了研究该技术的可行性，从而制定出一种有效的水合物储存方法，我们制作了一个考虑水合物生成动力学的三维气水流动模拟器。该模拟器实现了两相流条件下多孔介质中CO2水合物生成的新设计，并通过数值模拟结果与实验测量结果的对比，验证了砂质沉积物中气水两相流所需数学模型中的未知参数。
Among several methods for CO2capture and storage, we focus on CO2sequestration in the form of gas hydrate under the seafloor, mainly for many sequestration sites offshore Japan and for little risk of CO2leakage from the sediment. However, it is difficult to evaluate the precise storage potential and cost of this method due to the lack of the relevant information. Here, in order to do feasibility studies of this technique so as to make an effective storage method, we made a 3-dimentional gas water flow simulator with kinetic hydrate formation. The new design of CO2hydrate formation in porous media under two-phase flow condition was implemented in this simulator, and unknown parameters in necessary mathematical models for gas-water flow in sand sediments were verified from the comparison between the results of the numerical simulations and the experimental measurements from the previous study.