Overview of the MITI Nankai Trough Wells: A Milestone in the Evaluation of Methane Hydrate Resources
Abstract. Bottom‐simulating reflectors suggestive of the presence of methane hydrates are widely distributed below the ocean floor around Japan. In late 1999, drilling of the MITI Nankai Trough wells was conducted to explore this potential methane hydrate resource and a Tertiary conventional structu...
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Online Access: | http://dx.doi.org/10.1111/j.1751-3928.2004.tb00182.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1751-3928.2004.tb00182.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1751-3928.2004.tb00182.x |
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crwiley:10.1111/j.1751-3928.2004.tb00182.x 2024-09-15T18:18:35+00:00 Overview of the MITI Nankai Trough Wells: A Milestone in the Evaluation of Methane Hydrate Resources Tsuji, Yoshihiro Ishida, Hisashi Nakamizu, Masaru Matsumoto, Ryo Shimizu, Satoshi 2004 http://dx.doi.org/10.1111/j.1751-3928.2004.tb00182.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1751-3928.2004.tb00182.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1751-3928.2004.tb00182.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Resource Geology volume 54, issue 1, page 3-10 ISSN 1344-1698 1751-3928 journal-article 2004 crwiley https://doi.org/10.1111/j.1751-3928.2004.tb00182.x 2024-07-25T04:22:40Z Abstract. Bottom‐simulating reflectors suggestive of the presence of methane hydrates are widely distributed below the ocean floor around Japan. In late 1999, drilling of the MITI Nankai Trough wells was conducted to explore this potential methane hydrate resource and a Tertiary conventional structure. The wells are located in the Northwest Pacific Ocean off Central Japan at a water depth of 945 m. A total of six wells were drilled, including the main well, two pilot wells, and three post survey wells at intervals of 10–100 m. All wells except the first confirmed the occurrence of hydrates based on logging‐while‐drilling, wire‐line logging and/or coring using a pressure and temperature coring system in addition to conventional methods. Based on the various well profiles, four methane hydrate‐bearing sand‐rich intervals in turbidite fan deposits were recognized. Methane hydrates fill the pore spaces in these deposits, reaching saturation of up to 80 % in some layers. The methane hydrate‐bearing turbiditic sand layers are less than 1 m thick, with a total thickness of 12–14 m. The bottom depth of high hydrate concentration correlates well with the depth of the bottom‐simulating reflector. Based on these exploration results, the Japanese government inaugurated a 16‐year methane hydrate exploitation program in 2001. Article in Journal/Newspaper Methane hydrate Wiley Online Library Resource Geology 54 1 3 10 |
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English |
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Abstract. Bottom‐simulating reflectors suggestive of the presence of methane hydrates are widely distributed below the ocean floor around Japan. In late 1999, drilling of the MITI Nankai Trough wells was conducted to explore this potential methane hydrate resource and a Tertiary conventional structure. The wells are located in the Northwest Pacific Ocean off Central Japan at a water depth of 945 m. A total of six wells were drilled, including the main well, two pilot wells, and three post survey wells at intervals of 10–100 m. All wells except the first confirmed the occurrence of hydrates based on logging‐while‐drilling, wire‐line logging and/or coring using a pressure and temperature coring system in addition to conventional methods. Based on the various well profiles, four methane hydrate‐bearing sand‐rich intervals in turbidite fan deposits were recognized. Methane hydrates fill the pore spaces in these deposits, reaching saturation of up to 80 % in some layers. The methane hydrate‐bearing turbiditic sand layers are less than 1 m thick, with a total thickness of 12–14 m. The bottom depth of high hydrate concentration correlates well with the depth of the bottom‐simulating reflector. Based on these exploration results, the Japanese government inaugurated a 16‐year methane hydrate exploitation program in 2001. |
format |
Article in Journal/Newspaper |
author |
Tsuji, Yoshihiro Ishida, Hisashi Nakamizu, Masaru Matsumoto, Ryo Shimizu, Satoshi |
spellingShingle |
Tsuji, Yoshihiro Ishida, Hisashi Nakamizu, Masaru Matsumoto, Ryo Shimizu, Satoshi Overview of the MITI Nankai Trough Wells: A Milestone in the Evaluation of Methane Hydrate Resources |
author_facet |
Tsuji, Yoshihiro Ishida, Hisashi Nakamizu, Masaru Matsumoto, Ryo Shimizu, Satoshi |
author_sort |
Tsuji, Yoshihiro |
title |
Overview of the MITI Nankai Trough Wells: A Milestone in the Evaluation of Methane Hydrate Resources |
title_short |
Overview of the MITI Nankai Trough Wells: A Milestone in the Evaluation of Methane Hydrate Resources |
title_full |
Overview of the MITI Nankai Trough Wells: A Milestone in the Evaluation of Methane Hydrate Resources |
title_fullStr |
Overview of the MITI Nankai Trough Wells: A Milestone in the Evaluation of Methane Hydrate Resources |
title_full_unstemmed |
Overview of the MITI Nankai Trough Wells: A Milestone in the Evaluation of Methane Hydrate Resources |
title_sort |
overview of the miti nankai trough wells: a milestone in the evaluation of methane hydrate resources |
publisher |
Wiley |
publishDate |
2004 |
url |
http://dx.doi.org/10.1111/j.1751-3928.2004.tb00182.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1751-3928.2004.tb00182.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1751-3928.2004.tb00182.x |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_source |
Resource Geology volume 54, issue 1, page 3-10 ISSN 1344-1698 1751-3928 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1751-3928.2004.tb00182.x |
container_title |
Resource Geology |
container_volume |
54 |
container_issue |
1 |
container_start_page |
3 |
op_container_end_page |
10 |
_version_ |
1810456693522300928 |