ÇAĞRILI KONUŞMALAR / KEYNOTES Invited Speeches ... - TPJD

AVO Analysis of the Gas Hydrate Anomalies at Western Black Sea
Sinem Yavuz, Emin Demirbağ
Istanbul Technical University, Department of Geophysic Engineering, Istanbul
Nowadays, gas hydrates are important alternative source of energy to other hydrocarbon-based
energy sources. Determination of gas hydrates also has an importance because of the risks they
introduce. At Western Black Sea, a BSR level indicating existence of gas hydrates in some seismic
lines were observed in the collected seismic data between Akçakoca–Kurucaşile offshore Turkey
in 1998. The purpose of this study is to verify the presence of BSR level and to estimate the
seismic parameters of the medium. Within the scope of this purpose, seismic data processing
is carried out specifically for the seismic data that BSR level is observed as the most prominent
anomaly. After the data processing, AVO analysis is carried out on the formed CDP super gathers
to estimate the seismic parameters of the medium that BSR is significantly identified. In AVO
analysis, first order Zoeppritz approximations are used to get zero offset amplitude and slope
values. Statistical distribution of the zero offset amplitude and slope values indicates that zerooffset
amplitude values show more consistent distribution than slope values. Finally, seismic
parameters of the medium are estimated by forward modelling.
Keywords: BSR, AVO, Modelling
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