Modeling Dissociation of Gas Hydrates in Marine Sediments and Processes Related to Methane Transport in Faults and Fractures

本项目将建立和应用一个相对复杂的海洋沉积物中天然气水合物生成和分解的数值模型。该模型的实用性将包括：了解几种地质观测，如BSR以下的异常清新;以及评估扰动的天然气水合物系统的潜在预期，例如甲烷释放和裂纹扩展。PI将通过包括许多新因素来修改早期的模型，例如潜热和盐度，并结合气体水合物分解与压力、温度和盐度变化之间的反馈。他们还将尝试根据对天然气水合物系统的经验观察来测试他们的模型。

The PIs will construct and apply a relatively complex numerical model for the formation and dissociation of gas hydrate in marine sediments. Utility of the model will include: understanding several geological observations, such as anomalous freshening below the BSR; BSR offsets across faults; and assessing potential expectations of a perturbed gas hydrate system, such as methane release and crack propagation The PIs will modify earlier models by including a number of new factors, such as, latent heat and salinity, and incorporating feedbacks among gas hydrate dissociation and changes in pressure, temperature and salinity. They will also attempt to test their models against empirical observations of the gas hydrate system.