Effect of Methane Gas Hydrate Content of Marine Sediment on Ocean Wave-Induced Oscillatory Excess Pore Water Pressure and Geotechnical Implications
Methane gas hydrate-bearing sediments hold substantial natural gas reserves, and to understand their potential roles in the energy sector as the next generation of energy resources, considerable research is being conducted in industry and academia. Consequently, safe and economically feasible extrac...
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2025-01-01
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| author | Adango Miadonye Mumuni Amadu |
| author_facet | Adango Miadonye Mumuni Amadu |
| author_sort | Adango Miadonye |
| collection | DOAJ |
| description | Methane gas hydrate-bearing sediments hold substantial natural gas reserves, and to understand their potential roles in the energy sector as the next generation of energy resources, considerable research is being conducted in industry and academia. Consequently, safe and economically feasible extraction methods are being vigorously researched, as are methods designed to estimate site-specific reserves. In addition, the presence of methane gas hydrates and their dissociation have been known to impact the geotechnical properties of submarine foundation soils and slopes. In this paper, we advance research on gas hydrate-bearing sediments by theoretically studying the effect of the hydromechanical coupling process related to ocean wave hydrodynamics. In this regard, we have studied two geotechnically and theoretically relevant situations related to the oscillatory wave-induced hydromechanical coupling process. Our results show that the presence of initial methane gas pressure leads to excessively high oscillatory pore pressure, which confirms the instability of submarine slopes with methane gas hydrate accumulation originally reported in the geotechnical literature. In addition, our results show that neglecting the presence of initial methane gas pressure in gas hydrate-bearing sediments in the theoretical description of the oscillatory excess pore pressure can lead to improper geotechnical planning. Moreover, the theoretical evolution of oscillatory excess pore water pressure with depth indicates a damping trend in magnitude, leading to a stable value with depth. |
| format | Article |
| id | doaj-art-b4a1883f7e374710b8120f3ff00f8dce |
| institution | DOAJ |
| issn | 2673-3994 |
| language | English |
| publishDate | 2025-01-01 |
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| series | Fuels |
| spelling | doaj-art-b4a1883f7e374710b8120f3ff00f8dce2025-08-20T02:42:30ZengMDPI AGFuels2673-39942025-01-0161410.3390/fuels6010004Effect of Methane Gas Hydrate Content of Marine Sediment on Ocean Wave-Induced Oscillatory Excess Pore Water Pressure and Geotechnical ImplicationsAdango Miadonye0Mumuni Amadu1School of Science and Technology, Cape Breton University, Sydney, NS B1M 1A2, CanadaSchool of Science and Technology, Cape Breton University, Sydney, NS B1M 1A2, CanadaMethane gas hydrate-bearing sediments hold substantial natural gas reserves, and to understand their potential roles in the energy sector as the next generation of energy resources, considerable research is being conducted in industry and academia. Consequently, safe and economically feasible extraction methods are being vigorously researched, as are methods designed to estimate site-specific reserves. In addition, the presence of methane gas hydrates and their dissociation have been known to impact the geotechnical properties of submarine foundation soils and slopes. In this paper, we advance research on gas hydrate-bearing sediments by theoretically studying the effect of the hydromechanical coupling process related to ocean wave hydrodynamics. In this regard, we have studied two geotechnically and theoretically relevant situations related to the oscillatory wave-induced hydromechanical coupling process. Our results show that the presence of initial methane gas pressure leads to excessively high oscillatory pore pressure, which confirms the instability of submarine slopes with methane gas hydrate accumulation originally reported in the geotechnical literature. In addition, our results show that neglecting the presence of initial methane gas pressure in gas hydrate-bearing sediments in the theoretical description of the oscillatory excess pore pressure can lead to improper geotechnical planning. Moreover, the theoretical evolution of oscillatory excess pore water pressure with depth indicates a damping trend in magnitude, leading to a stable value with depth.https://www.mdpi.com/2673-3994/6/1/4gas hydrateoscillatory excess pore pressureshear strengthSkempton’s pore pressure coefficienthydromechanical coupling process |
| spellingShingle | Adango Miadonye Mumuni Amadu Effect of Methane Gas Hydrate Content of Marine Sediment on Ocean Wave-Induced Oscillatory Excess Pore Water Pressure and Geotechnical Implications Fuels gas hydrate oscillatory excess pore pressure shear strength Skempton’s pore pressure coefficient hydromechanical coupling process |
| title | Effect of Methane Gas Hydrate Content of Marine Sediment on Ocean Wave-Induced Oscillatory Excess Pore Water Pressure and Geotechnical Implications |
| title_full | Effect of Methane Gas Hydrate Content of Marine Sediment on Ocean Wave-Induced Oscillatory Excess Pore Water Pressure and Geotechnical Implications |
| title_fullStr | Effect of Methane Gas Hydrate Content of Marine Sediment on Ocean Wave-Induced Oscillatory Excess Pore Water Pressure and Geotechnical Implications |
| title_full_unstemmed | Effect of Methane Gas Hydrate Content of Marine Sediment on Ocean Wave-Induced Oscillatory Excess Pore Water Pressure and Geotechnical Implications |
| title_short | Effect of Methane Gas Hydrate Content of Marine Sediment on Ocean Wave-Induced Oscillatory Excess Pore Water Pressure and Geotechnical Implications |
| title_sort | effect of methane gas hydrate content of marine sediment on ocean wave induced oscillatory excess pore water pressure and geotechnical implications |
| topic | gas hydrate oscillatory excess pore pressure shear strength Skempton’s pore pressure coefficient hydromechanical coupling process |
| url | https://www.mdpi.com/2673-3994/6/1/4 |
| work_keys_str_mv | AT adangomiadonye effectofmethanegashydratecontentofmarinesedimentonoceanwaveinducedoscillatoryexcessporewaterpressureandgeotechnicalimplications AT mumuniamadu effectofmethanegashydratecontentofmarinesedimentonoceanwaveinducedoscillatoryexcessporewaterpressureandgeotechnicalimplications |