Quantifying hydrate solidification front advancing using method of characteristics

doi:10.1002/2015JB011985

Title: Quantifying hydrate solidification front advancing using method of characteristics

Abstract

Here, we develop a one-dimensional analytical solution based on the method of characteristics to explore hydrate formation from gas injection into brine-saturated sediments within the hydrate stability zone. Our solution includes fully coupled multiphase and multicomponent flow and the associated advective transport in a homogeneous system. Our solution shows that hydrate saturation is controlled by the initial thermodynamic state of the system and changed by the gas fractional flow. Hydrate saturation in gas-rich systems can be estimated by 1 – cl₀/cl_e when Darcy flow dominates, where cl₀ is the initial mass fraction of salt in brine, and cl_e is the mass fraction of salt in brine at three-phase (gas, liquid, and hydrate) equilibrium. Hydrate saturation is constant, gas saturation and gas flux decrease, and liquid saturation and liquid flux increase with the distance from the gas inlet to the hydrate solidification front. The total gas and liquid flux is constant from the gas inlet to the hydrate solidification front and decreases abruptly at the hydrate solidification front due to gas inclusion into the hydrate phase. The advancing velocity of the hydrate solidification front decreases with hydrate saturation at a fixed gas inflow rate. This analytical solution illuminates how hydrate ismore »« less

Authors:

You, Kehua ^[1]; DiCarlo, David ^[1]; Flemings, Peter B. ^[1]

Univ. of Texas at Austin, Austin, TX (United States)

Publication Date:: 2015-09-07

Research Org.:: Univ. of Texas at Austin, Austin, TX (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1468398

Alternate Identifier(s):: OSTI ID: 1402374

Grant/Contract Number:: FE0010406

Resource Type:: Accepted Manuscript

Journal Name:: Journal of Geophysical Research. Solid Earth

Additional Journal Information:: Journal Volume: 120; Journal Issue: 10; Journal ID: ISSN 2169-9313

Publisher:: American Geophysical Union

Country of Publication:: United States

Language:: English

Subject:: 58 GEOSCIENCES; hydrate saturation; hydrate solidification front; fractional flow; method of characteristics; phase diagram

Citation Formats


                    You, Kehua, DiCarlo, David, and Flemings, Peter B. Quantifying hydrate solidification front advancing using method of characteristics.  United States: N. p., 2015. 
        Web.  doi:10.1002/2015JB011985.

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                    You, Kehua, DiCarlo, David, & Flemings, Peter B. Quantifying hydrate solidification front advancing using method of characteristics.  United States.  doi:10.1002/2015JB011985.

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                    You, Kehua, DiCarlo, David, and Flemings, Peter B. Mon .  
        "Quantifying hydrate solidification front advancing using method of characteristics".  United States.  doi:10.1002/2015JB011985.  https://www.osti.gov/servlets/purl/1468398.

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@article{osti_1468398,

  title        = {Quantifying hydrate solidification front advancing using method of characteristics},

  author       = {You, Kehua and DiCarlo, David and Flemings, Peter B.},

  abstractNote = {Here, we develop a one-dimensional analytical solution based on the method of characteristics to explore hydrate formation from gas injection into brine-saturated sediments within the hydrate stability zone. Our solution includes fully coupled multiphase and multicomponent flow and the associated advective transport in a homogeneous system. Our solution shows that hydrate saturation is controlled by the initial thermodynamic state of the system and changed by the gas fractional flow. Hydrate saturation in gas-rich systems can be estimated by 1 – cl0/cle when Darcy flow dominates, where cl0 is the initial mass fraction of salt in brine, and cle is the mass fraction of salt in brine at three-phase (gas, liquid, and hydrate) equilibrium. Hydrate saturation is constant, gas saturation and gas flux decrease, and liquid saturation and liquid flux increase with the distance from the gas inlet to the hydrate solidification front. The total gas and liquid flux is constant from the gas inlet to the hydrate solidification front and decreases abruptly at the hydrate solidification front due to gas inclusion into the hydrate phase. The advancing velocity of the hydrate solidification front decreases with hydrate saturation at a fixed gas inflow rate. This analytical solution illuminates how hydrate is formed by gas injection (methane, CO2, ethane, propane) at both the laboratory and field scales.},

  doi          = {10.1002/2015JB011985},

  journal      = {Journal of Geophysical Research. Solid Earth},

  number       = 10,

  volume       = 120,

  place        = {United States},

  year         = {2015},

  month        = {9}

}

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DOI: 10.1002/2015JB011985

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Works referencing / citing this record:

Mechanisms of Methane Hydrate Formation in Geological Systems
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Title: Quantifying hydrate solidification front advancing using method of characteristics

Abstract

Citation Formats

The prediction of methane solubility in natural waters to high ionic strength from 0 to 250°C and from 0 to 1600 bar journal, April 1992

Enhanced lifetime of methane bubble streams within the deep ocean: ENHANCED LIFETIME OF METHANE BUBBLES journal, August 2002

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The evolution of methane vents that pierce the hydrate stability zone in the world's oceans: EVOLUTION OF METHANE VENTS journal, August 2014

Migration and venting of deep gases into the ocean through hydrate-choked chimneys offshore Korea journal, June 2009

Salinity‐buffered methane hydrate formation and dissociation in gas‐rich systems journal, February 2015

Passing gas through the hydrate stability zone at southern Hydrate Ridge, offshore Oregon journal, January 2006

Dynamic multiphase flow model of hydrate formation in marine sediments journal, January 2007

Evidence from three-dimensional seismic tomography for a substantial accumulation of gas hydrate in a fluid-escape chimney in the Nyegga pockmark field, offshore Norway journal, January 2010

Geological controls on focused fluid flow through the gas hydrate stability zone on the southern Hikurangi Margin of New Zealand, evidenced from multi-channel seismic data journal, November 2011

A mechanism for the formation of methane hydrate and seafloor bottom-simulating reflectors by vertical fluid expulsion journal, January 1992

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Active gas venting through hydrate-bearing sediments on the Vestnesa Ridge, offshore W-Svalbard journal, December 2012

Dissociation Pressures of the Phase CO 2 · 5 3/4 H 2 O journal, March 1965

A numerical model for the formation of gas hydrate below the seafloor journal, January 2001

Sedimentological control on saturation distribution in Arctic gas-hydrate-bearing sands journal, August 2012

Direct measurement of in situ methane quantities in a large gas-hydrate reservoir journal, January 1997

Gas hydrates-geological perspective and global change journal, May 1993

Permafrost-associated natural gas hydrate occurrences on the Alaska North Slope journal, February 2011

Geologic controls on gas hydrate occurrence in the Mount Elbert prospect, Alaska North Slope journal, February 2011

Predicting the occurrence, distribution, and evolution of methane gas hydrate in porous marine sediments journal, March 1999

A model for the diffusive growth of hydrate saturation anomalies in layered sediments journal, January 2011

Current perspectives on gas hydrate resources journal, January 2011

Global estimates of hydrate-bound gas in marine sediments: how much is really out there? journal, August 2004

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Short migration of methane into a gas hydrate-bearing sand layer at Walker Ridge, Gulf of Mexico: SHORT MIGRATION OF METHANE journal, February 2013

Sources of methane for marine gas hydrate: inferences from a comparison of observations and numerical models journal, January 2003

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Testing short-range migration of microbial methane as a hydrate formation mechanism: Results from Andaman Sea and Kumano Basin drill sites and global implications journal, July 2015

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The prediction of methane solubility in natural waters to high ionic strength from 0 to 250°C and from 0 to 1600 bar
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journal, August 2002

Rethinking the global carbon cycle with a large, dynamic and microbially mediated gas hydrate capacitor
journal, August 2003

Formation and accumulation of gas hydrate in porous media
journal, May 1997

Raman spectroscopic analyses of the growth process of CO2 hydrates
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Capillary controls on methane hydrate distribution and fracturing in advective systems: CAPILLARY CONTROLS ON HYDRATES
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The evolution of methane vents that pierce the hydrate stability zone in the world's oceans: EVOLUTION OF METHANE VENTS
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Migration and venting of deep gases into the ocean through hydrate-choked chimneys offshore Korea
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Salinity‐buffered methane hydrate formation and dissociation in gas‐rich systems
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Passing gas through the hydrate stability zone at southern Hydrate Ridge, offshore Oregon
journal, January 2006

Dynamic multiphase flow model of hydrate formation in marine sediments
journal, January 2007

Evidence from three-dimensional seismic tomography for a substantial accumulation of gas hydrate in a fluid-escape chimney in the Nyegga pockmark field, offshore Norway
journal, January 2010

Geological controls on focused fluid flow through the gas hydrate stability zone on the southern Hikurangi Margin of New Zealand, evidenced from multi-channel seismic data
journal, November 2011

A mechanism for the formation of methane hydrate and seafloor bottom-simulating reflectors by vertical fluid expulsion
journal, January 1992

Nucleation of gas hydrate in marine environments
journal, January 2003

Active gas venting through hydrate-bearing sediments on the Vestnesa Ridge, offshore W-Svalbard
journal, December 2012

Dissociation Pressures of the Phase CO ₂ · 5 3/4 H ₂ O
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A numerical model for the formation of gas hydrate below the seafloor
journal, January 2001

Sedimentological control on saturation distribution in Arctic gas-hydrate-bearing sands
journal, August 2012

Direct measurement of in situ methane quantities in a large gas-hydrate reservoir
journal, January 1997

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journal, May 1993

Permafrost-associated natural gas hydrate occurrences on the Alaska North Slope
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journal, February 2011

Predicting the occurrence, distribution, and evolution of methane gas hydrate in porous marine sediments
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Current perspectives on gas hydrate resources
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Global estimates of hydrate-bound gas in marine sediments: how much is really out there?
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