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Reflection seismology
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====Seismic attribute analysis==== {{See also|Seismic attribute}} Seismic attribute analysis involves extracting or deriving a quantity from seismic data that can be analysed in order to enhance information that might be more subtle in a traditional seismic image, leading to a better [[geology|geological]] or [[geophysics|geophysical]] interpretation of the data.<ref>{{cite web | title = Petrel Seismic Attribute Analysis | website = [[Schlumberger]] | url = http://www.slb.com/services/software/geo/petrel/seismic/seismic_multitrace_attributes.aspx | access-date = 8 September 2013 | archive-date = 29 July 2013 | archive-url = https://web.archive.org/web/20130729172415/http://www.slb.com/services/software/geo/petrel/seismic/seismic_multitrace_attributes.aspx | url-status = dead }}</ref> Examples of attributes that can be analysed include mean amplitude, which can lead to the delineation of [[bright spot]]s and [[dim spot]]s, [[Coherence (signal processing)|coherency]] and [[amplitude versus offset]]. Attributes that can show the presence of hydrocarbons are called [[direct hydrocarbon indicator]]s.
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