Attenuation or local wavefield amplification in the gas cloud ?
The presence of gas cloud has long been recognized as a significant problem in the seismic data processing around the world (North Sea, offshore South-East Asia). Major hydrocarbon bearing fields are affected by shallow gas clouds and therefore data quality in often suffers from serious wipeouts due...
| Main Author: | Prajapati, S. |
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| Format: | Conference or Workshop Item |
| Institution: | Universiti Teknologi Petronas |
| Record Id / ISBN-0: | utp-eprints.30957 / |
| Published: |
Society of Exploration Geophysicists
2016
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| Online Access: |
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85019064047&doi=10.1190%2fsegam2016-13462653.1&partnerID=40&md5=17773cf38c304cb3275d5cd801f37ffb http://eprints.utp.edu.my/30957/ |
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| Summary: |
The presence of gas cloud has long been recognized as a significant problem in the seismic data processing around the world (North Sea, offshore South-East Asia). Major hydrocarbon bearing fields are affected by shallow gas clouds and therefore data quality in often suffers from serious wipeouts due to shallow gas or gas leaking from a deep reservoir. In particular, amplitudes and phases are significantly affected by attenuation or local wavefield amplification. In principle, full waveform inversion (FWI) is a suitable tool to obtain detailed subsurface properties of the Earth. FWI is a data-strategy equation based ill-posed and highly non-linear approach has proved its effectiviness in significantly improving the spatial resolution of complex problem such as gas cloud. In present study, I approached this problem using elastic wave equation with and without considering the Q-factor in gas cloud. © 2016 SEG. |
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