Experimental investigation of gas-water relative permeability for gas-hydrate-bearing sediments from the Mount Elbert Gas Hydrate Stratigraphic Test Well, Alaska North Slope

Johnson, Andrew L. A.; Patil, Shirish; Dandekar, Abhijit

doi:10.1016/j.marpetgeo.2009.10.013

Cited by 154 publications

(84 citation statements)

References 10 publications

(11 reference statements)

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“…However, the initial effective permeability could not be determined because the gas hydrate was already dissociated. To estimate effective and relative permeability (defined as the ratio of effective permeability and absolute permeability) of hydrate-bearing conditions, Johnson et al (2011) artificially formed gas hydrate in sediment cores recovered from the Mount Elbert's permafrost region. To estimate effective permeability, Li et al (2014) recently conducted NMR measurements in the laboratory using samples of hydrate-bearing sandstone recovered from the Shenhu area of the South China Sea.…”

Section: Introductionmentioning

confidence: 99%

Permeability of sediment cores from methane hydrate deposit in the Eastern Nankai Trough

Konno

Yoneda

Egawa

et al. 2015

Marine and Petroleum Geology

185

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Section: Introductionmentioning

confidence: 99%

Permeability of sediment cores from methane hydrate deposit in the Eastern Nankai Trough

Konno

Yoneda

Egawa

et al. 2015

Marine and Petroleum Geology

185

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“…Assuming homogeneous distribution of hydrate in sediments, the presence of hydrate affects permeability by reducing the pore size and/or blocking pore. The permeability in hydrate-bearing sediments is presumed to be relatively lower than that in gassy sediments below the BHOZ [68][69][70]. Due to a lack of direct measured data on the coefficient of consolidation or permeability of hydrate-bearing sediments, an arbitrary value of low-permeability clay sediments (C V = 10 Mass density of water-saturated sediments [g·cm A 1000-m-thick sediment deposit was modeled.…”

Section: Geological Conditions and Input Propertiesmentioning

confidence: 99%

Submarine Slope Failure Primed and Triggered by Bottom Water Warming in Oceanic Hydrate-Bearing Deposits

Kwon

Cho

2012

Energies

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Many submarine slope failures in hydrate-bearing sedimentary deposits might be directly triggered, or at least primed, by gas hydrate dissociation. It has been reported that during the past 55 years ) the 0-2000 m layer of oceans worldwide has been warmed by 0.09 °C because of global warming. This raises the following scientific concern: if warming of the bottom water of deep oceans continues, it would dissociate natural gas hydrates and could eventually trigger massive slope failures. The present study explored the submarine slope instability of oceanic gas hydrate-bearing deposits subjected to bottom water warming. One-dimensional coupled thermal-hydraulic-mechanical (T-H-M) finite difference analyses were performed to capture the underlying physical processes initiated by bottom water warming, which includes thermal conduction through sediments, thermal dissociation of gas hydrates, excess pore pressure generation, pressure diffusion, and hydrate dissociation against depressurization. The temperature rise at the seafloor due to bottom water warming is found to create an excess pore pressure that is sufficiently large to reduce the stability of a slope in some cases. Parametric study results suggest that a slope becomes more susceptible to failure with increases in thermal diffusivity and hydrate saturation and decreases in pressure diffusivity, gas saturation, and water depth. Bottom water warming can be further explored to gain a better understanding of the past methane hydrate destabilization events on Earth, assuming that more reliable geological data is available. OPEN ACCESSEnergies 2012, 5 2850

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“…Only a few studies of effective gas-water permeability measurements of gas-hydrate-bearing sediments exist. 13,14 This is because the measurement of the pressure gradient of each phase is challenging due to the phase transition (formation-dissociation of a gas hydrate) during the gaswater flooding test. X-ray computed tomography (CT) scanning is an effective approach for observing phase transition in gas hydrates 13,[15][16][17][18][19] and is applied for measuring the effective permeability of fluids in which there is a phase transition (for example, steam and water 20,21 ).…”

Section: Introductionmentioning

confidence: 99%

Multiple-pressure-tapped core holder combined with X-ray computed tomography scanning for gas–water permeability measurements of methane-hydrate-bearing sediments

Konno

Jin

Uchiumi

et al. 2013

Review of Scientific Instruments

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We present a novel setup for measuring the effective gas-water permeability of methane-hydrate-bearing sediments. We developed a core holder with multiple pressure taps for measuring the pressure gradient of the gas and water phases. The gas-water flooding process was simultaneously detected using an X-ray computed tomography scanner. We successfully measured the effective gas-water permeability of an artificial sandy core with methane hydrate during the gas-water flooding test.

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Experimental investigation of gas-water relative permeability for gas-hydrate-bearing sediments from the Mount Elbert Gas Hydrate Stratigraphic Test Well, Alaska North Slope

Cited by 154 publications

References 10 publications

Permeability of sediment cores from methane hydrate deposit in the Eastern Nankai Trough

Permeability of sediment cores from methane hydrate deposit in the Eastern Nankai Trough

Submarine Slope Failure Primed and Triggered by Bottom Water Warming in Oceanic Hydrate-Bearing Deposits

Multiple-pressure-tapped core holder combined with X-ray computed tomography scanning for gas–water permeability measurements of methane-hydrate-bearing sediments

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