Concealed morphology construction and stability evaluation of two butted-well horizontal salt caverns gas storage

Energy, Journal Year: 2025, Volume and Issue: unknown, P. 134499 - 134499

Published: Jan. 1, 2025

Language: Английский

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Characterization and assessment of hydrogen leakage mechanisms in salt caverns

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: Jan. 2, 2025

Abstract Salt caverns are widely regarded as a suitable option for the underground storage of hydrogen. However, an accurate assessment hydrogen leakage through walls salt into surrounding formations remains crucial. In this work, flow formation is evaluated by assuming that rock consists bundles tortuous nano-capillary tubes. A formulation was then proposed to model in linear and radial domains. The formulations based on newly unified gas valid entire range Knudsen numbers accounts slippage, bulk diffusion, diffusion. finite-difference approximation with iterative procedure used treat nonlinearity solve presented formulations. were validated against experimental data reported literature. results obtained indicated over wide pore radii operating pressures temperatures, slippage regime must be considered. cavern relevant dimensions conditions, cumulative after 30 years cyclic only 0.36% maximum capacity. It also noticed most leaked would back at times when pressure lower than pressure, e.g. during production subsequent idle times. At low very tight rock, diffusion important mechanism transport. high though, viscous became predominant mechanism. presence thin interlayer such mudstone, carbonate, anhydrite body can have significant impact amount leakage. appeared although increasing from 120 135 bar led 11.9% increase capacity, loss increased significantly 0.007% bar. Furthermore, absolute rate natural higher storage, relative relation capacity much lower. compared storage. study help better understanding it comes large-scale

Language: Английский

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Optimization of the Design of Underground Hydrogen Storage in Salt Caverns in Southern Ontario, Canada

Mining, Journal Year: 2025, Volume and Issue: 5(1), P. 9 - 9

Published: Jan. 22, 2025

With the issue of energy shortages becoming increasingly serious, need to shift sustainable and clean sources has become urgent. However, due intermittent nature most renewable sources, developing underground hydrogen storage (UHS) systems as backup solutions offers a promising solution. The thick regionally extensive salt deposits in Unit B Southern Ontario, Canada, have demonstrated significant potential for supporting such systems. Based on stratigraphy statistics unit B, this study investigates feasibility stability caverns, focusing effects cavern shape, geometric parameters, operating pressures. Three shapes—cylindrical, cone-shaped, ellipsoid-shaped—were analyzed using numerical simulations. Results indicate that cylindrical caverns with diameter-to-height ratio 1.5 provide best balance between capacity structural stability, while ellipsoid-shaped offer reduced stress concentration but less space, posing practical challenges during leaching. results also optimal pressure range maintaining minimizing leakage lies 0.4 0.7 times vertical situ stress. Higher pressures increase lead greater stress, displacements, risks, lower leads internal extrusion tendency walls. Additionally, rate drops maximum working pressure, yet total mass keeps growing trend.

Language: Английский

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Stability evaluation and economic analysis of four-well interconnection salt cavern hydrogen storage-A case study of Huai’an, China

Renewable Energy, Journal Year: 2025, Volume and Issue: unknown, P. 122417 - 122417

Published: Jan. 1, 2025

Language: Английский

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Investigation of the effects of hydrogen injection and withdrawal frequency on stability and tightness of the salt cavern based on a novel coupled thermal-hydro-mechanical model

International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 82, P. 1238 - 1251

Published: Aug. 8, 2024

Language: Английский

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The development, frontier and prospect of Large-Scale Underground Energy Storage: A bibliometric review

Journal of Energy Storage, Journal Year: 2024, Volume and Issue: 103, P. 114293 - 114293

Published: Oct. 31, 2024

Language: Английский

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Investigating the Mechanism of Land Subsidence Due to Water Network Integration at the Guangzhou Longgui Salt Mine and Its Impact on Adjacent Subway

Water, Journal Year: 2024, Volume and Issue: 16(12), P. 1723 - 1723

Published: June 17, 2024

Water-soluble mining was invariably associated with surface subsidence, which in some cases escalated to the movement, deformation, and even collapse of overlying rock layers, triggering grave subsidence calamities. The caprock salt-bearing strata Longgui salt area closely adjacent third aquifer, mainly consisted fractured, porous, high-permeability materials such as mudstone conglomerates, rendering geological conditions highly complex. Years water-soluble had led significant area, a trend toward accelerated subsidence. In this study, were analyzed, through simulated experiments pillar dissolution mining, mechanisms examined. Over time, gradually perforated pillars caprock, ceasing support ultimately transforming small cavities into large single cavity. Utilizing data, research employed numerical simulation inverse predict patterns from 2019 2025, revealing that maximum reached 1367.6 mm I 1879.5 II, rates 12.05 mm/y 44.78 mm/y, respectively. Moreover, impact ground on construction subways assessed by establishing monitoring points evaluating along subway cross-sections longitudinal directions. findings provided valuable insights for guiding prevention control calamities mine similar areas Guangzhou, China.

Language: Английский

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Airtightness evaluation of compressed air energy storage (CAES) salt caverns in bedded rock salt

Journal of Energy Storage, Journal Year: 2024, Volume and Issue: 102, P. 114100 - 114100

Published: Oct. 11, 2024

Language: Английский

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Underground hydrogen storage in salt caverns: Recent advances, modeling approaches, barriers, and future outlook

Journal of Energy Storage, Journal Year: 2024, Volume and Issue: 107, P. 114951 - 114951

Published: Dec. 12, 2024

Language: Английский

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Analysis of Falling Block Characteristics in Salt Caverns Energy Storage Space

Energies, Journal Year: 2025, Volume and Issue: 18(1), P. 215 - 215

Published: Jan. 6, 2025

In the current global energy sector where storage technology is highly regarded, development of crucial. Utilizing specific underground space for oil and gas other sources direction future development, formed by deep-salt-mine water dissolution extraction has gradually become preferred choice. However, in actual operation, multi-layer salt cavities are prone to collapse interlayer bending pipes, seriously affecting progress, quality, safety entire construction. Therefore, based on relevant principles, a targeted experimental platform was established, taking photos measurements falling process objects, simulating situation objects spaces their impact related components. In-depth research conducted probability hitting inner pipe horizontal force under different conditions, results were verified rigorous numerical simulation analysis. The show that impacts can cause components bend, with maximum reaching 5.1% 24.6 N. addition, hydraulic fluctuations caused suction drainage cavity column have relatively small object trajectory. findings provide practical effective guidance safe construction facilities, ensuring be carried out safely efficiently, contribute steady industry as whole.

Language: Английский

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