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Showing 1 to 20 of 23 for “"methane hydrate"”.
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Methane hydrate growth kinetics
Includes bibliographical references (pages 114-118).
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Phase equilibrium study of methane hydrate
Gas hydrates are solid metastable ice like compounds formed when gas comes in contact with water and have the ability to form at low temperatures. In this study, methane gas hydrates were formed in a Berea sandstone core, which was saturated with brine and then pressurized with methane gas. The …
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Methane hydrate nucleation rates and mechanisms from molecular dynamics simulations
Includes bibliographical references (pages 81-93).
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Sensitivity of tetrahydrofuran hydrate and methane hydrate equilibria to porous media
Includes bibliographical references (pages 98-103).
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Effect of Sediment Composition on the Uniformity of Experimentally-Formed Methane Hydrate
Experimentalists that try to duplicate the methane hydrate found in natural systems have regularly made non-uniform hydrate in packed sediments. Some element of the natural system is missing from the experimental procedure. The goal of this research was to discover what role sediment composition …
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Development of geophysical methods to characterize methane hydrate reservoirs on a laboratory scale
Gashydrate sind kristalline Feststoffe bestehend aus Wasser und Gasmolekülen. Sie sind stabil bei erhöhten Drücken und niedrigen Temperaturen. Natürliche Hydratvorkommen treten daher an Kontinentalhängen, in Permafrostböden und in tiefen Seen sowie Binnenmeeren auf. Bei der Hydratbildung …
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Fibre optic monitoring and finite element analysis of well integrity in methane hydrate reservoirs
… on well integrity analysis and monitoring for methane hydrate reservoirs. Methane hydrate reservoirs are susceptible to large deformation due to their unconsolidated nature, which could substantially compromise well integrity during well construction as well as gas production periods. …
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On simultaneous heat and mass transfer with a change of phase: a numerical study of methane hydrate dissociation
Includes bibliographical references.
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Methane Gas Hydrate Morphology and its Effect on the Stiffness and Damping of some Sediments
Gas hydrates are ice–like compounds found in deep sea sediments and permafrosts. Concise detection<br/>and quantification of natural methane gas hydrate deposits, will allow for a more robust assessment<br/>of gas hydrate as a potential energy resource or natural geohazard. Current seismic methods, …
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The comparison of experimental and theoretical hydrate numbers
… for a more precise determination of the hydrate numbers of gas hydrates were developed. Hydrate numbers (the ratio of the moles of water to moles of gas in the gas hydrate) were determined for pure component ethane and methane hydrates at several equilibrium decomposition conditions and …
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Numerical Investigation of Hydrate-bearing Sediment Formation Heterogeneity during Methane Gas Recovery
The first offshore methane hydrate recovery trial was conducted in 2013 on the north slope of the Daini Atsumi Knoll in Eastern Nankai Trough, Japan. The methane hydrate concentrated zone (MHCZ) was roughly 300 m below the seafloor and 1300 m below sea level, with a dip to the northwest by roughly …
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Experimental Study of the PVTX Properties of the System H₂O-CH₄
… A study has also been conducted to determine methane hydrate stability over the temperature range of -40~20°C. Synthetic fluid inclusions were employed in both studies as miniature autoclaves. Experimental data for the PVTX properties of H₂O-CH₄ fluids under late diagenetic to low grade …
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Hydrate Formation Using Dowfax Gemini Surfactants
"Gas hydrate formation is a stochastic and slow process. However, the use of a small amount of surfactant can speed up the rate of hydrate formation. This work investigates the effect of two Dow surfactants, Dowfax 2A1 and Dowfax C6L, on gas hydrate formation, first by determining the adsorption …
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EXPERIMENTAL INVESTIGATION OF HYDRAULIC FRACTURING IN A PENNY-SHAPED CRACKED FOR FROZEN SAND AND HYDRATE-BEARING SAND USING UN-PROPPED AND NON-VISCOUS LIQUID
Hydrate-bearing sand (HBS) is a potential source of energy, in which solid methane hydrate is dissociated to produce methane gas. Hydrates are only stable under high pressure and low temperature. This study draws the motivation to improve the surface area for hydrate to dissociate by creating …
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A stable isotope stratigraphy for the Axel Heiberg Fossil Forest and its application to Eocene climate
… to bulk lignite. Both 1) a scenario of periodic methane hydrate pulses and 2) a scenario of fluctuating forest stand LAI (leaf area index) are not inconsistent with our data. Either mechanism could be responsible for large carbon isotope shifts. Higher plant input dominated the n-alkane …
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Development and deployment of a novel deep-sea in situ bubble sampling instrument for understanding the fate of methane in the water column
Methane (CH4) is a potent greenhouse gas that is often found in a solid, hydrate clathrate form in marine sediments along continental margins and will often escape from the seafloor and rise through the water column as bubbles. The estimated marine methane hydrate inventory is over 600 times …
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Development and deployment of a novel deep-sea in situ bubble sampling instrument for understanding the fate of methane in the water column
Methane (CH₄) is a potent greenhouse gas that is often found in a solid, hydrate clathrate form in marine sediments along continental margins and will often escape from the seafloor and rise through the water column as bubbles. The estimated marine methane hydrate inventory is over 600 times …
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Gas-generated fractures and methane venting in a deepwater Arctic setting
Methane seepages from seafloor sediments in the Arctic (West Svalbard) have occurred from two million years ago until the present. During glacial-interglacial cycles, gas venting behavior in shallow water (< 400 m) close to the West Svalbard margin can be explained by gas hydrate dissociation due …
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Impact of Hydrate Dissociation on the Stiffness and Strength of Hydrate Bearing Sands
… energy resources, notably natural gas hydrates. These ice-like compounds, abundant in permafrost and marine sediments, harbor vast quantities of methane, a potent energy source. However, conventional methods for recovering methane gas from natural hydrate bearing sand (HBS) deposits …
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