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Application of Deconvolution Methods to Improve Seismic Resolution and Recognition of Sedimentary Facies Containing Gas Hydrates  

Yi, Bo-Yeon (Department of Energy Resources Engineering, Pukyong National University)
Lee, Gwang-Hoon (Department of Energy Resources Engineering, Pukyong National University)
Kim, Han-Joon (Korea Ocean Research and Development Institute)
Jeong, Gap-Sik (Korea Ocean Research and Development Institute)
Yoo, Dong-Geun (Korea Institute of Geoscience and Mineral Resources)
Ryu, Byoung-Jae (Korea Institute of Geoscience and Mineral Resources)
Kang, Nyeon-Keon (Korea Institute of Geoscience and Mineral Resources)
Publication Information
Geophysics and Geophysical Exploration / v.13, no.4, 2010 , pp. 323-329 More about this Journal
Abstract
Three deconvolution methods were applied to stacked seismic data obtained to investigate gas-hydrates in the Ulleung Basin, East Sea: (1) minimum-phase spiking deconvolution, (2) minimum-phase spiking deconvolution using an averaged wavelet from all traces, and (3) deterministic deconvolution using a wavelet with phases computed from well-logs. We analyzed the resolving property of these methods for lithological boundaries. The first deconvolution method increases temporal resolution but decreases lateral continuity. The second method shows, in an overall sense, similar results to the spiking deconvolution using a minimum phase wavelet for each trace; however, it results in a more consistent and continuous bottom-simulating reflector (BSR) and better resolved sub-BSR reflectors. The results from the third method reveal more detailed internal structures of debris-flow deposits and increased continuity of reflectors; in addition, the seafloor reflection and the BSR appear to have changed to a zero-phase waveform. These properties help more precisely estimate the distribution and reserves of gas hydrates in the exploration area by improving analysis of facies and amplitude of the BSR.
Keywords
minimum-phase spiking deconvolution; ganged minimum-phase deconvolution; deterministic deconvolution; gas-hydrates; bottom-simulating reflector;
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