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Updated: Jul 13, 2025

Methane Hydrate Crystallization on Sessile Water Droplets
Published on: May 26, 2021
在CH4水合物采矿过程中,研究含水合物沉积物与重建的CO2水合物在不同层中的声学特性
Yi-Jian Zhu1, Xing Huang1, Hao Li1
1State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering and Environment, China University of Petroleum, Beijing 102249, China.
安全的天然气水合物 (NGH) 开采通过二氧化碳注入来增强,这稳定了水库并减少了沉降. 这种方法还有助于地质二氧化碳储存,与联合国可持续发展目标保持一致.
科学领域:
- 地质科学 地质科学
- 能源资源 能源资源
- 环境工程 环境工程
背景情况:
- 天然气水合物 (NGH) 提供了巨大的清洁能源潜力,但面临着海底滑坡和沉降等开发挑战.
- 目前的NGH开采方法可能会损害水库的稳定性,给基础设施和环境带来风险.
研究的目的:
- 通过压缩和间歇性CO2/N2注入来研究NGH开采期间储水库稳定性的变化.
- 评估二氧化碳水合物形成在缓解水库沉降和增强强度方面的有效性.
主要方法:
- 用声学特性 (P波速度,弹性模量) 来监测水库的稳定性.
- 在压缩/注射场景中,在10MPa的超负荷应力下测量了水库沉降.
- 两个注射比 (80:20和50:50mol%CO2:N2) 进行了测试.
主要成果:
- 二氧化碳水合物形成显著增加了P波速度和水库强度,无论是在水库上方和下方的区域.
- 顶部的二氧化碳水化合物储显示出更高的承压能力,与底部储相比,大大减轻了储沉降.
- 虽然CO2/N2扫除确保了刚性,但只有CO2水合物形成才能保证P波速度和弹性模块稳定性,以减轻沉降.
结论:
- 二氧化碳水合物形成对于保持水库稳定性和减少NGH开采期间沉降至关重要.
- 这种方法为安全和高效的NGH采矿提供了可行的战略,同时实现了地质二氧化碳储存 (SDG-13).
- 声学性能监测为建造稳定的水库和确保安全的NGH提取提供了宝贵的指导.
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