Numerical Predictions of Experimentally Observed Methane Hydrate Dissociation and Reformation in Sandstone
Numerical Predictions of Experimentally Observed Methane Hydrate Dissociation and Reformation in Sandstone
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DOI：
10.1021/ef500255y
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发表时间：
2014-09
期刊：
影响因子：
5.3
通讯作者：
K. Birkedal;C. M. Freeman;G. Moridis;A. Graue
中科院分区：
文献类型：
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作者：
K. Birkedal;C. M. Freeman;G. Moridis;A. Graue
数值工具是常规油气藏动态预测和评价的基础。天然气水合物是一种巨大的自然资源，具有巨大的能源潜力。数字代码/工具描述的过程中涉及的分解（由几种方法引起）的天然气生产的水合物是强大的，但他们需要通过比较验证经验数据灌输信心，在他们的预测。在这项研究中，我们成功地再现了水合物分解的实验数据，使用坚韧+HYDRATE（T+H）程序。甲烷（CH 4）水合物的生长和解离在部分水和气体饱和Bentheim砂岩的空间分辨使用磁共振成像（MRI），它允许在原位监测的饱和度和相变。在减压过程中回收了最初转化为气体水合物的所有CH 4。使用简化的2D模型和涉及...的3D网格对物理系统进行了数值再现。
Numerical tools are essential for the prediction and evaluation of conventional hydrocarbon reservoir performance. Gas hydrates represent a vast natural resource with a significant energy potential. The numerical codes/tools describing processes involved during the dissociation (induced by several methods) for gas production from hydrates are powerful, but they need validation by comparison to empirical data to instill confidence in their predictions. In this study, we successfully reproduce experimental data of hydrate dissociation using the TOUGH+HYDRATE (T+H) code. Methane (CH4) hydrate growth and dissociation in partially water- and gas-saturated Bentheim sandstone were spatially resolved using Magnetic Resonance Imaging (MRI), which allows the in situ monitoring of saturation and phase transitions. All the CH4 that had been initially converted to gas hydrate was recovered during depressurization. The physical system was reproduced numerically, using both a simplified 2D model and a 3D grid involving ...