2011 Fiscal Year Final Research Report
Establishment of the method for estimating highly concentrated methane hydrate using seismic attenuation and elucidation of accumulation mechanism of
| Project/Area Number |
21360445
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Earth system and resources enginnering
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| Research Institution | The University of Tokyo |
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Principal Investigator |
MATSUSHIMA Jun 東京大学, 大学院・工学系研究科, 准教授 (70282499)
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| Co-Investigator(Renkei-kenkyūsha) |
TAMAKI Kensaku 東京大学, 大学院・工学系研究科, 教授 (50188421)
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| Project Period (FY) |
2009 – 2011
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| Keywords | メタンハイドレート / 地震波減衰 / 岩石物理学 / 集積メカニズム / 音波検層 / 反射法地震探査 / VSP地震探査 / 減衰メカニズム |
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| Research Abstract |
In order to reduce uncertainties in characterizing methane hydrate bearing sediments, the combined use of other physical parameters can be helpful for reliable quantification of hydrate system. Measurement of seismic attenuation from laboratory and field data, as well as theoretical work, indicate a link between attenuation, the presence of fracture and fluid saturation. Derivation of frequency dependency of total attenuation has a potential to provide insight into the characteristics of hydrate system. We developed advanced seismic attenuation estimation methods and apply them for various seismic methods including ultrasonic laboratory measurement, sonic logging, VSP, and surface seismic.
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