Survey on Methane Hydrate Detection with Marine Electromagnetic

Abstract

Methane hydrate (MH) is required to be another vitality asset in light of the fact that a lot of methane gas might be contained in the MH layer. MH has high resistive element, so that the marine EM studies will be a valuable apparatus for recognizing subseafloor MH. We present two contextual investigations of marine electromagnetic overviews off Japan drift to identify MH beneath the ocean bottom. The primary case is done in the Sea of Japan, 2005. Our marine profound towed EM streamer link could picture the subseafloor resistivity dissemination to the profundity of 100m beneath the ocean bottom, and effectively distinguished MH zones as high resistivity. The second case, a marine CSEM try, with a profound towed link and a sea base electromagnetometer (OBEM), is done off the Tokai territory, along the Pacific side of Japan, 2006. A thin and profound MH zone (with thickness of around 30m and profundity of around 200m beneath the ocean bottom) perceived in the borehole is not obviously imaged by our overview. The reason is principally because of variance of the track and bearing of profound towed source dipole. Further and cautious investigation of CSEM information with acoustic route information will enable us to picture the profound MH zone.