Micromechanical Investigation of Stress Relaxation in Gas Hydrate-Bearing Sediments Due to Sand Production

Past experience of gas production from methane-hydrate-bearing sediments indicates that sand migration is a major factor restricting the production of gas from methane-hydrate reservoirs. One important geotechnical aspect of sand migration is the influence of grain detachment on the existing stresses. This paper focuses on understanding and quantifying the nature of this aspect using different approaches, with a focus on discrete element method (DEM) simulations of sand detachment from hydrate-bearing sand samples. The investigation in the paper reveals that sand migration affects isotropic and deviatoric stresses differently. In addition, the existence of hydrate moderates the magnitude of stress relaxation. Both of these features are currently missing from continuum-based models, and therefore, a new constitutive model for stress relaxation is suggested, incorporating the research findings. Model parameters are suggested based on the DEM simulations. The model is suitable for continuum mechanics-based simulations of gas production from hydrate reservoirs.

[1]  Yukio Nakata,et al.  Mechanical and dissociation properties of methane hydrate-bearing sand in deep seabed , 2013 .

[2]  S. Dallimore,et al.  Overview of science program, JAPEX/JNOC/GSC Mallik 2L-38 gas hydrate research well , 1999 .

[3]  T. Inoue,et al.  Overview of thermal-stimulation production-test results for the JAPEX/ JNOC/ GSC et al. Mallik 5L-38 gas hydrate production research well , 2005 .

[4]  Jaehyoung Lee,et al.  Laboratory Test to Evaluate the Performance of Sand Control Screens During Hydrate Dissociation Process by Depressurization , 2013 .

[5]  W. Sung,et al.  Development and application of gas hydrate reservoir simulator based on depressurizing mechanism , 2000 .

[6]  A. Klar,et al.  A cohesionless micromechanical model for gas hydrate-bearing sediments , 2019, Granular Matter.

[7]  Jeen-Shang Lin,et al.  An SMP critical state model for methane hydrate‐bearing sands , 2015 .

[8]  T. Ebinuma,et al.  Analysis of Production Data for 2007/2008 Mallik Gas Hydrate Production Tests in Canada , 2010 .

[9]  Carolyn A. Koh,et al.  Natural gas hydrates: Recent advances and challenges in energy and environmental applications , 2007 .

[10]  Kenichi Soga,et al.  Characterisation and engineering properties of methane hydrate soils , 2007 .

[11]  P. A. Cundall,et al.  Computer Simulations of Dense Sphere Assemblies , 1988 .

[12]  William F. Waite,et al.  Simultaneous determination of thermal conductivity, thermal diffusivity and specific heat in sI methane hydrate , 2007 .

[13]  R. Hyndman,et al.  A seismic study of methane hydrate marine bottom simulating reflectors , 1992 .

[14]  Nicolas Kalogerakis,et al.  Kinetics of formation of methane and ethane gas hydrates , 1987 .

[15]  George J. Moridis,et al.  Numerical Studies of Gas Production From Methane Hydrates , 2003 .

[16]  M. Reagan,et al.  Strategies for gas production from oceanic Class 3 hydrate accumulations , 2007 .

[17]  K. Soga,et al.  Discrete element modelling of geomechanical behaviour of methane hydrate soils with pore-filling hydrate distribution , 2010 .

[18]  J. Santamarina,et al.  A constitutive mechanical model for gas hydrate bearing sediments incorporating inelastic mechanisms , 2017 .

[19]  T. Inoue,et al.  Scientific results from the Mallik 2002 gas hydrate production research well program, Mackenzie Delta, northwest territories, Canada: Preface , 2005 .

[20]  F. Enzmann,et al.  Microstructural evolution of gas hydrates in sedimentary matrices observed with synchrotron X‐ray computed tomographic microscopy , 2015 .

[21]  D. Praeg,et al.  Distribution and geological control of mud volcanoes and other fluid/free gas seepage features in the Mediterranean Sea and nearby Gulf of Cadiz , 2014, Geo-Marine Letters.

[22]  S. Pinkert Rowe’s Stress-Dilatancy Theory for Hydrate-Bearing Sand , 2017 .

[23]  Yang Li,et al.  Sand production evaluation during gas production from natural gas hydrates , 2018, Journal of Natural Gas Science and Engineering.

[24]  Kazuo Aoki,et al.  Effects of Methane Hydrate Formation On Shear Strength of Synthetic Methane Hydrate Sediments , 2005 .

[25]  Niall J. English,et al.  Gas hydrate technology: state of the art and future possibilities for Europe , 2017 .

[26]  Kenichi Soga,et al.  Stress-strain response of hydrate-bearing sands: Numerical study using discrete element method simulations , 2012 .

[27]  Bjørn Kvamme,et al.  Using a Reactive Transport Simulator to Simulate CH4 Production from Bear Island Basin in the Barents Sea Utilizing the Depressurization Method , 2017 .

[28]  J. Nagao,et al.  Pressure-core-based reservoir characterization for geomechanics: Insights from gas hydrate drilling during 2012–2013 at the eastern Nankai Trough , 2017 .

[29]  R. Boswell,et al.  Current perspectives on gas hydrate resources , 2011 .

[30]  Jonny Rutqvist,et al.  Coupled Hydrologic, Thermal and Geomechanical Analysis of Well Bore Stability in Hydrate-Bearing Sediments , 2008 .

[31]  K. Soga,et al.  Coupled deformation-flow analysis for methane hydrate production by depressurized wells , 2005 .

[32]  Jeffery B. Klauda,et al.  Global Distribution of Methane Hydrate in Ocean Sediment , 2005 .

[33]  Jeen-Shang Lin,et al.  Numerical simulations of sand migration during gas production in hydrate-bearing sands interbedded with thin mud layers at site NGHP-02-16 , 2019, Marine and Petroleum Geology.

[34]  T. Kanno,et al.  Operational overview of the first offshore production test of methane hydrates in the Eastern Nankai Trough , 2014 .

[35]  S. Ergun Fluid flow through packed columns , 1952 .

[36]  K. Soga,et al.  Discrete element modelling of methane hydrate soil sediments using elongated soil particles , 2016 .

[37]  A. Milkov Worldwide distribution of submarine mud volcanoes and associated gas hydrates , 2000 .

[38]  Jeen-Shang Lin,et al.  Multistage Triaxial Tests on Laboratory‐Formed Methane Hydrate‐Bearing Sediments , 2018 .

[39]  V. Brovkin,et al.  Ocean methane hydrates as a slow tipping point in the global carbon cycle , 2009, Proceedings of the National Academy of Sciences.

[40]  M. Jiang,et al.  DEM simulation of bonded granular material. Part II: Extension to grain-coating type methane hydrate bearing sand , 2016 .

[41]  Kenichi Soga,et al.  Coupled deformation–flow analysis for methane hydrate extraction , 2010 .

[42]  G. Deerberg,et al.  Simulation of Methane Recovery from Gas Hydrates Combined with Storing Carbon Dioxide as Hydrates , 2011 .

[43]  Assaf Klar,et al.  Sand production model in gas hydrate-bearing sediments , 2016 .

[44]  F. Liu,et al.  A bond contact model for methane hydrate‐bearing sediments with interparticle cementation , 2014 .

[45]  J. Mienert,et al.  A Double Gas‐Hydrate Related Bottom Simulating Reflector at the Norwegian Continental Margin , 2000 .

[46]  Takashi Uchida,et al.  Petrophysical Properties of Natural Gas Hydrates‐Bearing Sands and Their Sedimentology in the Nankai Trough , 2004 .

[47]  Rainer Helmig,et al.  Non-isothermal, multi-phase, multi-component flows through deformable methane hydrate reservoirs , 2015, Computational Geosciences.

[48]  A. Klar,et al.  Thermo-hydro-mechanical Sand Production Model in Hydrate-bearing Sediments , 2013 .

[49]  Kenichi Soga,et al.  Explicitly Coupled Thermal Flow Mechanical Formulation for Gas-Hydrate Sediments , 2013 .

[50]  K. Kvenvolden,et al.  Gaia's breath—global methane exhalations , 2005 .

[51]  B. Anderson,et al.  Mount Elbert Gas Hydrate Stratigraphic Test Well, Alaska North Slope: Overview of scientific and technical program , 2011 .

[52]  Arthur H. Johnson,et al.  GLOBAL RESOURCE POTENTIAL OF GAS HYDRATE - A NEW CALCULATION , 2011 .

[53]  S. Sasaki,et al.  Elasticity of single-crystal methane hydrate at high pressure , 2002 .

[54]  D. Archer Methane hydrate stability and anthropogenic climate change , 2007 .

[55]  R. N. Edwards,et al.  The Assessment of Marine Gas Hydrates Through Electrical Remote Sounding: Hydrate Without a BSR? , 2000 .

[56]  J. Grozic Interplay Between Gas Hydrates and Submarine Slope Failure , 2010 .

[57]  J. Wright,et al.  GEOLOGIC AND POROUS MEDIA FACTORS AFFECTING THE 2007 PRODUCTION RESPONSE CHARACTERISTICS OF THE JOGMEC/NRCAN/AURORA MALLIK GAS HYDRATE PRODUCTION RESEARCH WELL , 2008 .

[58]  Kenichi Soga,et al.  Critical state soil constitutive model for methane hydrate soil , 2012 .

[59]  A. Milkov Global estimates of hydrate-bound gas in marine sediments: how much is really out there? , 2004 .

[60]  M. Riedel,et al.  Role of gas hydrates in slope failure on frontal ridge of northern Cascadia margin , 2011 .

[61]  Marcelo Sánchez,et al.  Coupled Numerical Modeling of Gas Hydrate‐Bearing Sediments: From Laboratory to Field‐Scale Analyses , 2018, Journal of Geophysical Research: Solid Earth.

[62]  J. Howard,et al.  ConocoPhillips Gas Hydrate Production Test , 2013 .