Porosity anomalies revealed by LWD show the sediment displacement by the formation and growth of gas hydrate in fine sediments in gas chimney structures, the eastern margin of Japan Sea


Manabu Tanahashi1, Sumito Morita2 and Ryo Matsumoto1, (1)Meiji University, Gas Hydrate Research Laboratory, Tokyo, Japan, (2)Geological Survey of Japan, AIST, Tsukuba, Ibaraki, Japan