Rock Physics Model and Seismic Dispersion and Attenuation in Gas Hydrate-Bearing Sediments

A rock physics model was established to calculate the P-wave velocity dispersion and attenuation caused by squirt flow of fluids in gas hydrate-bearing sediments. The critical hydrate saturation parameter introduced describe different ways concentration, including mode pore filling co-existence particle cementation. Rock physical modeling results indicate that is insensitive increase for filling, while it increases rapidly with increasing Meanwhile, seismic show both PP mode-converted PS reflections are lower than value, they tend change obviously higher value. These can be interpreted only when begins part solid matrix at high saturation, represents observable impact on elastic properties Synthetic seismograms calculated a 2D heterogeneous where varies vertically layer thickness sediment laterally. Modeling larger generally corresponds stronger reflection amplitudes from bottom simulating reflector.