| Affiliation: | 1. Production Technology Team, National Institute of Advanced Industrial Science and Technology, 2‐17‐2‐1 Tsukisamu‐Higashi, Toyohiraku, Sapporo 062‐8517 (Japan), Fax: (+81)?11‐857‐8985;2. Methane Hydrate Research Center, National Institute of Advanced Industrial Science and Technology, 2‐17‐2‐1 Tsukisamu‐Higashi, Toyohiraku, Sapporo 062‐8517 (Japan);3. Reservoir Characterization Team, National Institute of Advanced Industrial Science and Technology, 2‐17‐2‐1 Tsukisamu‐Higashi, Toyohiraku, Sapporo 062‐8517 (Japan) |
