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Data Acquisition of Logging While Drilling at the Newly Discovered Gas Hydrate Reservoir in Hyuganada Sea, Japan

Author

Listed:
  • Toshinori Imai

    (Japan Organization for Metals and Energy Security, Chiba-shi 261-0025, Chiba, Japan)

  • Than Tin Aung

    (Japan Organization for Metals and Energy Security, Chiba-shi 261-0025, Chiba, Japan)

  • Akira Fujimoto

    (Japan Organization for Metals and Energy Security, Chiba-shi 261-0025, Chiba, Japan)

  • Satoshi Ohtsuki

    (Japan Organization for Metals and Energy Security, Chiba-shi 261-0025, Chiba, Japan)

  • Kotaro Tano

    (Japan Organization for Metals and Energy Security, Chiba-shi 261-0025, Chiba, Japan
    Current address: INPEX Corporation, Minato-ku, Tokyo 107-6332, Japan.)

  • Shuhei Otomo

    (Japan Organization for Metals and Energy Security, Chiba-shi 261-0025, Chiba, Japan)

  • Naoyuki Shimoda

    (Japan Organization for Metals and Energy Security, Chiba-shi 261-0025, Chiba, Japan)

  • Takanao Yoshii

    (Japan Methane Hydrate Operating Co., Ltd., Chiyoda-ku, Tokyo 100-0005, Japan
    Current address: Japan Petroleum Exploration Co., Ltd., Chiyoda-ku, Tokyo 100-0005, Japan.)

  • Ryugen Sakata

    (Japan Methane Hydrate Operating Co., Ltd., Chiyoda-ku, Tokyo 100-0005, Japan
    Current address: Japan Petroleum Exploration Co., Ltd., Chiyoda-ku, Tokyo 100-0005, Japan.)

  • Jun Yoneda

    (National Institute of Advanced Industrial Science and Technology, Sapporo 062-8517, Hokkaido, Japan)

  • Kiyofumi Suzuki

    (National Institute of Advanced Industrial Science and Technology, Tsukuba 305-8560, Ibaraki, Japan)

Abstract

From December 2021 to January 2022, MH21-S conducted an exploratory drilling campaign using logging-while-drilling tools to confirm the methane hydrate concentrated zone (MHCZ) for future offshore production tests. In a preliminary screening study using seismic survey data, methane hydrate (MH) prospects have been extracted in The Hyuganada Sea, offshore Kyushu. In the exploration drilling site, a previous study had reported that MH prospects were inferred from four indices. We have selected two MH prospects: one with an anticlinal structure and another with a planus structure. As a result of drilling, a resistivity value higher than 3 Ω·m, which was a criterion for interpreting MHCZs from log data, was confirmed at a depth of 336–376 mBSF in the prospect with an anticlinal structure. The MH saturation calculated using Archie’s formula was 12–95% (average saturation of 70%). The average density porosity at the same depth was 52%. P-wave velocities were faster than the upper layers. Compared with those of the MHCZ at Daini Atsumi Knoll, the MH saturation is expected to be higher, the spread of some strong-amplitude reflectors has been interpreted from seismic survey data, and the potential MH resources in this area can be sufficiently expected.

Suggested Citation

  • Toshinori Imai & Than Tin Aung & Akira Fujimoto & Satoshi Ohtsuki & Kotaro Tano & Shuhei Otomo & Naoyuki Shimoda & Takanao Yoshii & Ryugen Sakata & Jun Yoneda & Kiyofumi Suzuki, 2024. "Data Acquisition of Logging While Drilling at the Newly Discovered Gas Hydrate Reservoir in Hyuganada Sea, Japan," Energies, MDPI, vol. 17(15), pages 1-15, August.
  • Handle: RePEc:gam:jeners:v:17:y:2024:i:15:p:3815-:d:1448877
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