Hydrogen storage in saline aquifers: The role of cushion gas for injection and production
Hydrogen storage in saline aquifers: The role of cushion gas for injection and production
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DOI：
10.1016/j.ijhydene.2021.09.174
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发表时间：
2021-10
影响因子：
7.2
通讯作者：
N. Heinemann;Jonathan Scafidi;G. Pickup;E. Thaysen;A. Hassanpouryouzband;M. Wilkinson;A. Satterley;M. Booth;K. Edlmann;R. S. Haszeldinea
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文献类型：
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作者：
N. Heinemann;Jonathan Scafidi;G. Pickup;E. Thaysen;A. Hassanpouryouzband;M. Wilkinson;A. Satterley;M. Booth;K. Edlmann;R. S. Haszeldinea
大规模储存在多孔岩石中的氢有助于缓解间歇性可再生能源发电的主要缺点，并将作为燃料替代品在限制全球变暖方面发挥重要作用。本研究使用工业标准储层工程软件讨论了开放含盐含水层背斜中氢的注入、储存和生产，并研究了垫层气的作用，结果表明，一口井可以在含盐含水层背斜中注入和再生足够的氢气，覆盖25%的孔隙。每年的氢能源所需的脱碳东安格利亚（英国）的家庭供暖。垫层气在含盐含水层中起着重要作用，其注入以盐水驱替为主，并伴有高压。垫层气体与工作气体的所需比例强烈地依赖于地质参数，包括储层深度、圈闭形状和储层渗透率，这些参数在本研究中进行了研究。一般来说，具有高渗透率的深层储层是有利的。研究表明，垫气量的大小直接决定了工作气的注采动态。它的结论是，一个彻底的调查到垫气的要求，考虑到垫气成本以及垫气到位的成本效益，应该是一个不可分割的一部分，在盐水层的氢存储发展计划。
Hydrogen stored on a large scale in porous rocks helps alleviate the main drawbacks of intermittent renewable energy generation and will play a significant role as a fuel substitute to limit global warming. This study discusses the injection, storage and production of hydrogen in an open saline aquifer anticline using industry standard reservoir engineering software, and investigates the role of cushion gas, one of the main cost uncertainties of hydrogen storage in porous media.The results show that one well can inject and reproduce enough hydrogen in a saline aquifer anticline to cover 25% of the annual hydrogen energy required to decarbonise the domestic heating of East Anglia (UK). Cushion gas plays an important role and its injection in saline aquifers is dominated by brine displacement and accompanied by high pressures. The required ratio of cushion gas to working gas depends strongly on geological parameters including reservoir depth, the shape of the trap, and reservoir permeability, which are investigated in this study. Generally, deeper reservoirs with high permeability are favoured. The study shows that the volume of cushion gas directly determines the working gas injection and production performance. It is concluded that a thorough investigation into the cushion gas requirement, taking into account cushion gas costs as well as the cost-benefit of cushion gas in place, should be an integral part of a hydrogen storage development plan in saline aquifers.