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Gas-In-Place Estimate for Potential Gas Hydrate Concentrated Zone in the Kumano Basin, Nankai Trough Forearc, Japan

Author

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  • Katie Taladay

    (Department of Geology & Geophysics, University of Hawaii at Manoa, Honolulu, HI 96822, USA
    Department of Geography, University of Hawaii at Manoa, Honolulu, HI 96822, USA)

  • Brian Boston

    (Department of Geology & Geophysics, University of Hawaii at Manoa, Honolulu, HI 96822, USA
    Research and Development Center for Earthquake and Tsunami, Japan Agency for Marine-Earth Science and Technology, Yokohama, Kanagawa 236-0001, Japan)

  • Gregory F. Moore

    (Department of Geology & Geophysics, University of Hawaii at Manoa, Honolulu, HI 96822, USA)

Abstract

Methane hydrate concentrated zones (MHCZs) have become targets for energy exploration along continental margins worldwide. In 2013, exploratory drilling in the eastern Nankai Trough at Daini Atsumi Knoll confirmed that MHCZs tens of meters thick occur directly above bottom simulating reflections imaged in seismic data. This study uses 3-dimensional (3D) seismic and borehole data collected from the Kumano Basin offshore Japan to identify analogous MHCZs. Our survey region is located ~100 km southwest of the Daini Atsumi Knoll, site of the first offshore gas hydrate production trial. Here we provide a detailed analysis of the gas hydrate system within our survey area of the Kumano forearc including: (1) the 3D spatial distribution of bottom simulating reflections; (2) a thickness map of potential MHCZs; and (3) a volumetric gas-in-place estimate for these MHCZs using constraints from our seismic interpretations as well as previously collected borehole data. There is evidence for two distinct zones of concentrated gas hydrate 10–90 m thick, and we estimate that the amount of gas-in-place potentially locked up in these MHCZs is 1.9–46.3 trillion cubic feet with a preferred estimate of 15.8 trillion cubic feet.

Suggested Citation

  • Katie Taladay & Brian Boston & Gregory F. Moore, 2017. "Gas-In-Place Estimate for Potential Gas Hydrate Concentrated Zone in the Kumano Basin, Nankai Trough Forearc, Japan," Energies, MDPI, vol. 10(10), pages 1-23, October.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:10:p:1552-:d:114366
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    References listed on IDEAS

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    1. W. T. Wood & J. F. Gettrust & N. R. Chapman & G. D. Spence & R. D. Hyndman, 2002. "Decreased stability of methane hydrates in marine sediments owing to phase-boundary roughness," Nature, Nature, vol. 420(6916), pages 656-660, December.
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    Cited by:

    1. Zhen Li & Erik Spangenberg & Judith M. Schicks & Thomas Kempka, 2022. "Numerical Simulation of Coastal Sub-Permafrost Gas Hydrate Formation in the Mackenzie Delta, Canadian Arctic," Energies, MDPI, vol. 15(14), pages 1-25, July.

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