Development of high expoiment technology for methane hydrate and evaluation of deformation of reservoir

2016 Fiscal Year Final Research Report

• Project/Area Number: 25249065
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Geotechnical engineering
• Research Institution: Yamaguchi University
• Principal Investigator: Hyodo Masayuki 山口大学, 創成科学研究科, 教授(特命) (40130091)
• Co-Investigator(Kenkyū-buntansha): 鈴木 素之 山口大学, 理工学研究科, 准教授 (00304494) ; 吉本 憲正 山口大学, 理工学研究科, 助教 (00325242) ; 田中 一宏 山口大学, 理工学研究科, 准教授 (30188289) ; 川村 喜一郎 山口大学, 理工学研究科, 准教授 (50321675) ; 中田 幸男 山口大学, 理工学研究科, 教授 (90274183)
• Project Period (FY): 2013-04-01 – 2017-03-31
• Keywords: メタンハイドレート / 生産模型実験 / 砂 / 細粒分含有率 / 圧力 / 温度 / 平面ひずみせん断 / 局所変形

Outline of Final Research Achievements

In order to investigate the production of methane hydrate, a model testing apparatus was developed which can simulate in-situ pressure , temperature and stress conditions of methane reservoir in a cylindrical chamber. The production well set up in the center is used to mimic the hydrate production by depressurization method. The pore pressures, temperatures are measured by 6 pressure sensors and 6 thermocouples respectively, which set up around the wellbore. The variations of pore water pressure and temperature were detected by installed sensors in the specimen. The MH dissociation tests by plane strain testing apparatus were also performed on sand specimen with various fines content with the measurement of localized deformation. During depressurization, marked deformation was not observed, because of an increase of effective stress. However, after depressurization, re-pressurization caused the specimen to fail in the case of high initial shear stress conditions.

Free Research Field

Geotechnical Engineering