Integrated thermal gas production from methane hydrate formation

K. Sasaki, Y. Sugai, Takafumi Yamakawa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

An integrated thermal system, named "Gas to Wire System", for gas production from methane hydrate (MH) layers and generating electricity has been presented based on a balance of waste heat of power plant and dissociations heat of MH including heating the MH layer with hot water. Firstly, gas production by the depressurization method was discussed based on the heat balance between MH dissociation heat and latent heat generated by decreasing of MH equilibrium temperature. The ideal initial MH saturation, showing the maximum one to get 100% gas recover-factor, was obtained as around 16%, even if 6 MPa depressurization is applied for a MH layer. Thus, the depressurization method may be applied for MH layers with low MH saturation less than 20%. The gas production system by injecting hot water from the plant and MH layers using a pair of dual-horizontal wells were modeled and simulated numerically. In the MH reservoir, a dissociated region flowing hot water between dual-horizontal wells, namely hot water chamber, was generated to produce gas continuously. Numerical simulations on MH gas production by hot water injection into a MH layer at Eastern Nankai Trough have been carried out by STARS™ with a pair of dual-horizontal wells 500m in length drilled in the methane hydrate layer of 20 m in layer thickness. Furthermore, a gas production scheme, which uses flow direction changes with four pairs of dual-horizontal wells in radial arrangement in a MH layer with area of 1 km2 located at Eastern Nankai Trough, has been presented, and its production performance was evaluated by the numerical simulation as the cumulative gas production for 15 years is 1.3×108 std-m3. Finally, total heat balance of the MH gas production system has been investigated, and the waste heat of power generating plant can provide enough heat to increasing MH layer temperature and MH dissociation.

Original languageEnglish
Title of host publicationSociety of Petroleum Engineers - European Unconventional Resources Conference and Exhibition 2014
Subtitle of host publicationUnlocking European Potential
PublisherSociety of Petroleum Engineers
Pages948-956
Number of pages9
ISBN (Print)9781632660817
Publication statusPublished - Feb 25 2014
EventEuropean Unconventional Resources Conference and Exhibition 2014: Unlocking European Potential - Vienna, Austria
Duration: Feb 25 2014Feb 27 2014

Publication series

NameSociety of Petroleum Engineers - European Unconventional Resources Conference and Exhibition 2014: Unlocking European Potential
Volume2

Other

OtherEuropean Unconventional Resources Conference and Exhibition 2014: Unlocking European Potential
CountryAustria
CityVienna
Period2/25/142/27/14

Fingerprint

Methane
Hydrates
gas production
Gases
methane
Horizontal wells
Hot Temperature
well
Gas hydrates
Water
heat balance
Waste heat
production system
power plant
Power plants
trough
gas
saturation
Water injection
Latent heat

All Science Journal Classification (ASJC) codes

  • Geology
  • Geochemistry and Petrology
  • Fuel Technology

Cite this

Sasaki, K., Sugai, Y., & Yamakawa, T. (2014). Integrated thermal gas production from methane hydrate formation. In Society of Petroleum Engineers - European Unconventional Resources Conference and Exhibition 2014: Unlocking European Potential (pp. 948-956). (Society of Petroleum Engineers - European Unconventional Resources Conference and Exhibition 2014: Unlocking European Potential; Vol. 2). Society of Petroleum Engineers.

Integrated thermal gas production from methane hydrate formation. / Sasaki, K.; Sugai, Y.; Yamakawa, Takafumi.

Society of Petroleum Engineers - European Unconventional Resources Conference and Exhibition 2014: Unlocking European Potential. Society of Petroleum Engineers, 2014. p. 948-956 (Society of Petroleum Engineers - European Unconventional Resources Conference and Exhibition 2014: Unlocking European Potential; Vol. 2).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Sasaki, K, Sugai, Y & Yamakawa, T 2014, Integrated thermal gas production from methane hydrate formation. in Society of Petroleum Engineers - European Unconventional Resources Conference and Exhibition 2014: Unlocking European Potential. Society of Petroleum Engineers - European Unconventional Resources Conference and Exhibition 2014: Unlocking European Potential, vol. 2, Society of Petroleum Engineers, pp. 948-956, European Unconventional Resources Conference and Exhibition 2014: Unlocking European Potential, Vienna, Austria, 2/25/14.
Sasaki K, Sugai Y, Yamakawa T. Integrated thermal gas production from methane hydrate formation. In Society of Petroleum Engineers - European Unconventional Resources Conference and Exhibition 2014: Unlocking European Potential. Society of Petroleum Engineers. 2014. p. 948-956. (Society of Petroleum Engineers - European Unconventional Resources Conference and Exhibition 2014: Unlocking European Potential).
Sasaki, K. ; Sugai, Y. ; Yamakawa, Takafumi. / Integrated thermal gas production from methane hydrate formation. Society of Petroleum Engineers - European Unconventional Resources Conference and Exhibition 2014: Unlocking European Potential. Society of Petroleum Engineers, 2014. pp. 948-956 (Society of Petroleum Engineers - European Unconventional Resources Conference and Exhibition 2014: Unlocking European Potential).
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