Mechanical properties of gas hydrate-bearing sediments during hydrate dissociation

Gang Li, Dan Mei Wu, Xiao-Sen Sen Li, Qiu Nan Lv, Chao Li, Yu Yi ZHANG, G.J. Moridis, G P Nikishkov, Bo Li, Sheng-Dong Liu, Yun-Pei Liang, Hang Liu, Xiao-Sen Sen Li, Gang Li, Jing Chun Feng, Yi Wang, Bo Li, Xiao-Sen Sen Li, Yu Yi ZHANG, Yi WangXiongfei Nie, Weiguo Liu, Yongchen Song, Jiafei Zhao, Rui Wang, Doctor Scientiarum, Jiafei Zhao, D. Shi, Y. Zhao, O. Kolditz, S. Bauer, L. Bilke, Li-Juan HE, Xing-Lin LEI, Yu Yi ZHANG, O. Kolditz, S. Bauer, C. H. Park, H. B. Shao, H. B. Shao, Y. Y. Sun, A. K. Singh, W. Wang, Y. Wu, W. Xu, X.H Zhang, J. C. Santamarina, J. Jang, H. Shin, Marcelo Sánchez

Research output: Contribution to journalArticlepeer-review

296 Scopus citations

Abstract

The kinetic behaviors of methane hydrate dissociation under depressurization in porous media are investigated through experimental and numerical simulations. Hydrate samples with low gas saturations (SG≤0.10) are synthesized in the pilot-scale hydrate simulator (PHS), a novel three-dimensional pressure vessel with effective inner volume of 117.8L. Three experimental runs with different production pressure at the central vertical well have been carried out. The intrinsic dissociation rate constant k0 is fitted to be approximately 4578kg/(m2Pa s) using the experimental data of run 1, and it is used for the kinetic simulation in all the three runs. The whole production process can be divided into two stages: the free gas and mixed gas production (stage I) and the gas production from hydrate dissociation (stage II). Both the experimental and numerical simulation results show that the gas production rate increases with the decrease of the production pressure, while the water extraction rate will rise much higher if the wellbore pressure is dropped extremely low. The free gas saturation is found to be a key factor that affects the overall production behaviors of marine hydrate deposits. In addition, the comparisons of the kinetic and equilibrium models indicate that the kinetic limitations are very small in the PHS. The hydrate dissociation under depressurization in the PHS is mainly controlled by the mass and heat transfer processes. © 2014 Elsevier Ltd.
Original languageEnglish (US)
Number of pages11
JournalApplied Energy
DOIs
StatePublished - 2017

Keywords

  • Carbon dioxide storage
  • Constitutive model
  • Depressurization
  • Dissociation
  • Elasto-viscoplastic model
  • Experiment
  • GRI
  • Gas Chimney
  • Gas hydrate
  • Gas hydrate reservoir simulator
  • Gas shales
  • Geohazards
  • Haynesville
  • Heat
  • Heat transfer
  • Hydrate saturation
  • Hydrates
  • Intrinsic rate
  • Kinetics
  • Methane hydrate
  • Model
  • Modeling
  • Natural gas hydrate
  • Natural gas recovery
  • Numerical modeling
  • Numerical simulation
  • OMAE2012-84085
  • Open-source software
  • OpenGeoSys
  • Permeability
  • Phase change
  • Porosity
  • Porous media
  • Quartz sands
  • Saturation
  • Shenhu Area
  • Simulation
  • Thermo-hydro-mechanical-chemical
  • Thermo-hydro-mechanical/chemical
  • Unsaturated soil
  • Water immersion porosimetry (WIP)
  • Youngs modulus
  • a geomechanical model for
  • all rights reserved
  • depressurization
  • dissociation
  • energy
  • fabric
  • gas
  • gas hydrate-bearing sediments
  • hydrate-bearing sediments
  • ice publishing
  • mechanical properties
  • natural gas production
  • poro-elasticity
  • shear strength
  • strength
  • structure of soils
  • testing of materials
  • thermo-hydro-chemo-mechanical model
  • triaxial test

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