Methane hydrates: Sampling and pressure core technology

Marco Terzariol, Juan Carlos Santamarina

Research output: Contribution to conferencePaperpeer-review

Abstract

Gas expansion in sediments mobilizes capillary forces that can cause extensive destructuration during sampling and core recovery. The situation is aggravated in marine and permafrost hydrate-bearing sediments as hydrate dissociation experiences a volume expansion of ~172 times. Pressure core technology prevents hydrate dissociation: unique samplers lock-in the in-situ fluid pressure and subsequent sediment characterization takes place without ever depressurizing the specimen. While the fluid pressure remains within the stability field, specimens experience changes in effective stress. Samplers and test chambers must be carefully designed, and test protocols meticulously executed to obtain reliable properties for analyses and design. Lessons learned in geotechnical engineering and experimental results obtained with hydrate-bearing sediments help advance pressure core sampling and testing technology. The technology has been deployed to study hydrate-bearing sediments in the Gulf of Mexico (USA), Krishna- Godavari Basin (India), Ulleung Basin (S. Korea), and Nankai Trough (Japan).

Original languageEnglish (US)
Pages3471-3474
Number of pages4
StatePublished - Jan 1 2017
Event19th International Conference on Soil Mechanics and Geotechnical Engineering, ICSMGE 2017 - Seoul, Korea, Republic of
Duration: Sep 17 2017Sep 22 2017

Conference

Conference19th International Conference on Soil Mechanics and Geotechnical Engineering, ICSMGE 2017
CountryKorea, Republic of
CitySeoul
Period09/17/1709/22/17

Keywords

  • Methane hydrates
  • Natural sample testing
  • Pressure core technology
  • Sampling

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology

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