Journal : Acta Geophysica
Article : Application of AVO analysis to gas hydrates identification in the northern slope of the South China Sea

Authors :
Tsoulis, D.
Department of Geodesy and Surveying, Aristotle University of Thessaloniki, Thessaloniki, Greece, tsoulis@auth.gr,
Patlakis, K.
Department of Geodesy and Surveying, Aristotle University of Thessaloniki, Thessaloniki, Greece,
Ansari, A.
Department of Applied Geophysics, Indian School of Mines, Dhanbad, India,
Khan, P.
Department of Applied Geophysics, Indian School of Mines, Dhanbad, India, pkkhan_india@yahoo.com,
Rehman, S.
1National Seismic Monitoring Center, Pakistan Meteorological Department, Islamabad, Pakistan, srltp@yahoo.com,
Lindholm, C.
Norwegian Seismic Array, NORSAR, Kjeller, Norway,
Ahmed, N.
Pakistan Meteorological Department, Islamabad, Pakistan,
Rafi, Z.
Pakistan Meteorological Department, Islamabad, Pakistan,
Erbek, E.
Department of Geophysical Engineering, Suleyman Demirel University, Isparta, Turkey, ezgierbek@sdu.edu.tr,
Dolmaz, M.
Department of Geophysical Engineering, Suleyman Demirel University, Isparta, Turkey, nuridolmaz@sdu.edu.tr,
Gąsior, I.
Oil and Gas Institute, Kraków, Poland, gasior@inig.pl,
Przelaskowska, A.
Oil and Gas Institute, Kraków, Poland, przelaskowska@inig.pl,
Yang, R.
Key Laboratory of Marginal Sea Geology of Chinese Academy of Sciences, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China, yangrui@ms.giec.ac.cn,
Yan, P.
1Key Laboratory of Marginal Sea Geology of Chinese Academy of Sciences, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China,
Wu, N.
Guangzhou Center for Gas Hydrate Research, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou, China;, yangrui@ms.giec.ac.cn,
Sha, Z.
Guangzhou Marine Geological Survey, Guangzhou, China,
Liang, J.
Guangzhou Marine Geological Survey, Guangzhou, China,
Abstract : Amplitude versus offset (AVO) analysis is a conventional seismic exploration technique in geophysical and lithological interpretation and has been widely used in onshore and offshore exploration. Its use in marine gas hydrate research, however, is still in initial stages. In this study, AVO analysis is applied to seismic profiles at drilling sites where hydrate samples have been recovered. The AVO responses of free gas, bottom simulating reflector (BSRs), and gas hydrates are discussed, and the AVO attributes in relation to gas hydrates are summarized. The results show that changes in intercept, gradient, fluid factor and Poisson’s ratio clearly reflect: (i) location of free gas and the BSR, and (ii) spatial relations between blank zone, BSR, gas hydrate, and free gas.

Keywords : Morze Południowochińskie, gazohydraty, analiza AVO, gaz swobodny, BSRs, South China Sea, gas hydrates, AVO analysis, free gas, BSRs,
Publishing house : Instytut Geofizyki PAN
Publication date : 2014
Number : Vol. 62, no. 4
Page : 802 – 817

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DOI :
Qute : Tsoulis, D. ,Patlakis, K. ,Ansari, A. ,Khan, P. ,Rehman, S. ,Lindholm, C. ,Ahmed, N. ,Rafi, Z. ,Erbek, E. ,Dolmaz, M. ,Gąsior, I. ,Przelaskowska, A. ,Yang, R. ,Yan, P. ,Wu, N. ,Sha, Z. ,Liang, J. ,Liang, J. , Application of AVO analysis to gas hydrates identification in the northern slope of the South China Sea. Acta Geophysica Vol. 62, no. 4/2014
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