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The Analysis of Dissociation Properties According to Gas Hydrate Saturation and Depressurization Rate

가스하이드레이트 포화율 및 감압률에 따른 해리특성 분석

An, Seung-Hee;Chon, Bo-Hyun
안승희;전보현

  • Received : 2015.04.14
  • Accepted : 2015.06.26
  • Published : 2015.06.28

Abstract

The gas hydrate of 10 trillion tons are buried under continental slope in the world(permafrost : 2%, marine continental slope: 98%), but technology for the the commercial gas recovery has not developed yet. There are normally four representative recovery methods: depressurization method, thermal stimulation method, inhibition injection method, and displacement method. This study focuses on change of dissociation time and gas production according to gas hydrate saturation rate and depressurization rate. It was found that the correlation between depressrization rate and dissociation time was like as $Y=0.0004X^2-0.499X+176.86$. It was also found that the bigger depressurization rate is, the better production is(methane gas is produced over 46.2% at depressurization rate 50% compared with 40%). However, on the contrary to this, it is presumed that gas production is decreased at 60% due to gas hydrate reformation.

Keywords

gas hydrate;depressurization rate;dissociation time(or elapsed time);saturation rate

References

  1. A Study on the Field Application for Gas Hydrate Production(II), KOGAS, (2013, 2014)
  2. 第24, 26回 メタンハイドレ-ト開發實施 檢討會, (2013)
  3. Studies on Gas Hydrate Development & Production Technology, KIGAM, (2013)
  4. E.Dendy Sloan, Carolyn A.Koh, "Clathrate Hydrates of Natural Gases Third Edition", CRC Press, (2008)

Cited by

  1. Heat and mass transfer analysis of depressurization-induced hydrate decomposition with different temperatures of over- and underburden vol.44, 2017, https://doi.org/10.1016/j.jngse.2017.03.021

Acknowledgement

Grant : 해양플랜트 특성화대학