Nature of methane gas hydrate BSR(Bottom Simulating Reflector) from elastic wave simulation

摘要

Methane gas hydrate studies have recentlyattracted attention due to their importance for significant naturalresource and the global tectonic and dynamic linkage of the earth.Free gas zone below a hydrate stability zone is also focused on asignificant reservoir of natural gas. Reflection seismic survey is aparticularly important method to detect the base of gas hydratestability zone as a BSR. Elastic wave simulations are carried outto understand the acoustic nature of methane gas hydrate BSR insediments. Two geological models are presented, and have beenused for computer simulations. According to the results, BSRsare recognized quite well anywhere at the BSR potentialboundaries, if low-velocity zone is present just beneath themethane gas hydrate layer. BSR amplitude is strong enough to berecognized in a seismic profile, but it should be paid dueattention for the interpretation of the phase and amplitude of BSR.