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Wave Attenuation of Marine Gas Hydrate-bearing Sediments - Model and Seismic Quality Factor
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 78th EAGE Conference and Exhibition 2016, May 2016, Volume 2016, p.1 - 5
Abstract
P-wave and S-wave velocity will increase when the amount of gas hydrate increase, and the attenuation will vary too. Wave attenuation is an important property of gas hydrate-bearing sediments (GHBS) which is used to identify its and estimate the saturation. In this paper, we use BISQ model to replace Gassmann equation in the EMT, and research the velocity and attenuation of hydrate-bearing sediments in the full frequency band. Based on this model, we apply the logging and VSP data from Ocean drilling Program (ODP) leg 164 in obtaining the amount of GHBS. Moreover, seismic quality factors (Q) are obtained from the 2D multi-channel pre-stack seismic in Dongsha area, SCS, which can be used as the indication of gas hydrate.