Low frequency measurement system for seismic attenuation in methane hydrate bearing sediments

2015 Fiscal Year Final Research Report

• Project/Area Number: 25420881
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Earth system and resources engineering
• Research Institution: The University of Tokyo
• Principal Investigator: Matsushima Jun 東京大学, 工学(系)研究科(研究院), 准教授 (70282499)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: メタンハイドレート / 地震波減衰 / 低周波数

Outline of Final Research Achievements

To validate attenuation phenomena in methane hydrate bearing sediments, which have been observed in various seismic methods at widely different frequencies and to elucidate the rock physics mechanism responsible for those phenomena, low-frequency laboratory experiments were conducted. We tried to construct a laboratory measurement system utilizing a mechanoluminescent sensing material. The advantage of using this technique is that we can measure the stress field over entire region of a sample, which may lead to more stable measurements than existing methods measuring stress and strain at a point or a whole. This method is the first trial to measure seismic wave by optical sensing.

Free Research Field

物理探査（地震探査）