Sequestering CO2 as CO2 hydrate in an offshore saline aquifer by reservoir pressure management

Kai Zhang and Hon Chung Lau

Energy, 2022, vol. 239, issue PC

Abstract: CO2 has been successfully sequestered in aquifers at shallow water depth as supercritical CO2. However, at a water depth larger than 630 m in tropical regions, there exists a hydrate stability zone (HSZ) extending below the seafloor where CO2 and water can exist as solid CO2 hydrate. It is generally believed that CO2 cannot be stored inside the HSZ as formation of CO2 hydrate will impair CO2 injectivity. In this study, we investigate the feasibility of storing CO2 inside this HSZ by reservoir pressure management vis-à-vis the CO2 hydrate formation pressure through the use of water producers and CO2 injectors.

Keywords: CO2 hydrate; Hydrate stability zone; Saline aquifer; CO2 storage; Geological sequestration (search for similar items in EconPapers)
Date: 2022
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Citations: View citations in EconPapers (6)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:239:y:2022:i:pc:s0360544221024798

DOI: 10.1016/j.energy.2021.122231

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