Insights into the climate-driven evolution of gas hydrate-bearing permafrost sediments: implications for prediction of environmental impacts and security of energy in cold regions

Farahani, Mehrdad Vasheghani; Hassanpouryouzband, Aliakbar; Yang, Jinhai; Tohidi, Bahman

doi:10.1039/d1ra01518d

Cited by 60 publications

(29 citation statements)

References 62 publications

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“…The wettability alteration is influenced by the flow of the different phases, surface morphology of rock, relative permeability, different phases saturation and capillary pressure . Therefore, H 2 trapping mechanism may possibly be affected via withdrawing, re/injection, formation contamination (fines migration), bacterial based formation precipitation and clogging, and mineral dissolution in pore-network system. , H 2 is a highly diffusive gas, and therefore the main risk associated with its storage is leakage via underground natural pathways (such as seepages, faults, and fractures) and drilled wellbores. H 2 has a small molecular diameter (when compared to CO 2 ), and therefore, it may quickly become upwardly buoyant under certain reservoir conditions.…”

Section: Review Of H2 Geological Storage In Depleted Oil/gas and Sali...mentioning

confidence: 99%

Toward a Fundamental Understanding of Geological Hydrogen Storage

Aftab

Hassanpouryouzband

Xie

et al. 2022

Ind. Eng. Chem. Res.

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150

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Geological H 2 storage plays a central role to enable the successful transition to the renewable H 2 economy and achieve net-zero emission in the atmosphere. Depleted oil and gas reservoirs are already explored with extensive reservoir and operational data. However, residual hydrocarbons can mix with injected H 2 in the reservoirs. Furthermore, low density and high diffusivity of H 2 may establish H 2 leakage from the reservoirs via fault pathways. Interestingly, H 2 can be consumed by microorganisms, which results in pore-network precipitation, plugging, and partial permeability impairment. Therefore, stored H 2 may be lost in the formations if the storage scenario is not planned cautiously. While salt caverns are safe and commercially proven geo-rock for H 2 storage, they have low-storage capacity compared to depleted gas reservoirs. Moreover, salt structures (e.g., domel, bedded) and microorganisms activities in the salt cavern are limiting factors, which can influence the storage process. Accordingly, we discuss challenges and future perspectives of hydrogen storage in different geological settings. We also highlight geographical limitations with diverse microbial communities and theoretical understanding of abiotic transformation (in terms of rock's minerals, i.e., mica and calcite) for geological H 2 storage. Regarding the fundamental behavior of H 2 in the geological settings, it is less soluble in formation water; therefore, it may achieve less solubility trapping compared to CO 2 and CH 4 . Furthermore, H 2 gas could attain higher capillary entrance pressures in porous media over CH 4 and CO 2 due to higher interfacial tension. Additionally, the low viscosity of H 2 may facilitate its injection and production but H 2 may establish the secondary trapping and viscous fingering. Thus, this review documents a blend of key information for the amendment of subsurface H 2 storage at the industrial scale.

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Section: Review Of H2 Geological Storage In Depleted Oil/gas and Sali...mentioning

confidence: 99%

Toward a Fundamental Understanding of Geological Hydrogen Storage

Aftab

Hassanpouryouzband

Xie

et al. 2022

Ind. Eng. Chem. Res.

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150

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“…Thus, porous materials containing uniformly distributed water are promising systems for obtaining hydrates [ 18 , 19 ]. Moreover, studying the gas hydrates formation and decomposition in natural porous media is relevant for understanding the formation process of these compounds in nature and the production of gas from hydrate-bearing sediments [ 20 , 21 , 22 ]. Utilizing various visualization methods allows the features of the processes under consideration to be identified [ 23 , 24 ], making it possible to develop ways to control them in the future.…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional-Printed Polymeric Cores for Methane Hydrate Enhanced Growth

et al. 2023

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Polymeric models of the core prepared with a Raise3D Pro2 3D printer were employed for methane hydrate formation. Polylactic acid (PLA), acrylonitrile butadiene styrene (ABS), carbon fiber reinforced (UltraX), thermoplastic polyurethane (PolyFlex), and polycarbonate (ePC) were used for printing. Each plastic core was rescanned using X-ray tomography to identify the effective porosity volumes. It was revealed that the polymer type matters in enhancing methane hydrate formation. All polymer cores except PolyFlex promoted the hydrate growth (up to complete water-to-hydrate conversion with PLA core). At the same time, changing the filling degree of the porous volume with water from partial to complete decreased the efficiency of hydrate growth by two times. Nevertheless, the polymer type variation allowed three main features: (1) managing the hydrate growth direction via water or gas preferential transfer through the effective porosity; (2) the blowing of hydrate crystals into the volume of water; and (3) the growth of hydrate arrays from the steel walls of the cell towards the polymer core due to defects in the hydrate crust, providing an additional contact between water and gas. These features are probably controlled by the hydrophobicity of the pore surface. The proper filament selection allows the hydrate formation mode to be set for specific process requirements.

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“…A conservative estimate is that 20 Gt C (2.7×1013 kg CH4) may be sequestered in permafrost-associated gas hydrates if methane were the only hydrate-former. This value is slightly more than 1 % of modern estimates (corresponding to 1600 Gt C to 1800 Gt C) for global gas-in-place in methane hydrates and about double the absolute estimate (11.2 Gt C) made in 1981 [13,14]. However, gas hydrate, a frozen, naturally-occurring, and highly-concentrated form of methane, sequesters significant carbon in the global system and is stable only over a range of low-temperature and moderate-pressure conditions.…”

Section: Introductionmentioning

confidence: 63%

“…Permafrost-associated gas hydrates are often assumed to contain ∼1% of the global gas-in-place in gas hydrates based on a study published over three decades ago [13,14]. A conservative estimate is that 20 Gt C (2.7×1013 kg CH4) may be sequestered in permafrost-associated gas hydrates if methane were the only hydrate-former.…”

Section: Introductionmentioning

confidence: 99%

Analysis of spatiotemporal distribution of methane column concentration and emission source in permafrost area of Northeast China based on AIRS data

Xu¹,

Chen²,

Shan³

et al. 2023

IJE

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Northeast China has the largest high-latitude permafrost distribution zone in China. With the intensification of global warming, the carbon stored in the permafrost will gradually thaw and release in the form of methane gas to air, thus increasing the methane column concentration in the near-surface troposphere. However, at present, the spatiotemporal distribution and emission source of methane column concentration in the near-surface troposphere are not clear. In this paper, using the AIRS (Atmospheric Infrared Sounder) remote sensing data from Aqua satellite, we analyzed the distribution and change trend of the methane column concentration in the near-surface troposphere in Northeast China from 2003 to 2021, and combined with the national meteorological and field monitoring data, we studied the emission mechanism and emission source of surface methane in the permafrost area of Northeast China. Study results show that: the permafrost zone in Northeast China has a high methane emission capacity in four seasons, and the methane column concentration shows a significant double-peak seasonal variation. The first peak appears in summer (June to August) and the maximum appears in August, the second peak appears in winter (December to February) and the maximum appears in December. However, the maximum average growth rate of near-surface methane column concentration in Northeast China appeared in spring (5.378ppbv/a), the reason is that the carbon stored under the permafrost is gradually exposed and released in the form of methane. The emission sources include microbial action, methane transported by wetland groundwater, geological methane (metastable methane hydrate, steady-state methane hydrate and thermogenic methane produced in the deep underground or coal seams) stored in frozen layer. The study provide data and technical support for the estimation of carbon emissions in permafrost areas in Northeast China.

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Insights into the climate-driven evolution of gas hydrate-bearing permafrost sediments: implications for prediction of environmental impacts and security of energy in cold regions

Abstract: The present study investigates the evolution of gas hydrate-bearing permafrost sediments against the environmental temperature change.

Cited by 60 publications

References 62 publications

Toward a Fundamental Understanding of Geological Hydrogen Storage

Toward a Fundamental Understanding of Geological Hydrogen Storage

Three-Dimensional-Printed Polymeric Cores for Methane Hydrate Enhanced Growth

Analysis of spatiotemporal distribution of methane column concentration and emission source in permafrost area of Northeast China based on AIRS data

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