Water and gas flows in hydrate-bearing sediments

Yue Xu, Yongkoo Seol, Jaewon Jang, Sheng Dai

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

Gas hydrate plays a critical role in new energy resource, global carbon budget, and submarine instability. Enhanced understanding on how gas hydrates influencing these issues largely depends on in-depth understanding of multiphase flow in hydrate-bearing sediments particularly during hydrate formation and dissociation processes. However, appropriate selection of flow parameter values for hydrate simulators is not available. Published parameter values show large discrepancies among hydrate simulators as well as between numerical and experimental studies. Based on experimental results of single-phase flow in hydrate-bearing sediments, recommended flow parameters for hydrate-bearing sediments are λ = 1, Srw = 0.1, and Srg = 0.55 for the Brooks and Corey model and m = 0.7, Srw = 0.1, and Srg = 0.5 for the van Genuchten model. In general, current hydrate simulators underestimate residual gas saturation Srg, which will lead to overestimated rate of gas production from hydrate deposits. These results are also relevant to multiphase flow in porous media undergoing diagenesis, bio-clogging, or mineral precipitation and dissolution.

Original languageEnglish (US)
Pages (from-to)766-772
Number of pages7
JournalGeotechnical Special Publication
Issue numberGSP 280
DOIs
StatePublished - 2017

ASJC Scopus subject areas

  • Architecture
  • Civil and Structural Engineering
  • Building and Construction
  • Geotechnical Engineering and Engineering Geology

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