Video - Amplitude vs Offset talk by Patrick Connolly

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Super Basins 14: Adroit use of Attributes/AVO from Exploration 3D

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Friday, February 17, 2023

Video Presentation

<p>Your browser does not support iframes.</p>	Amplitude vs Offset talk by Patrick Connolly Patrick Connolly Patrick Connolly Associates
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Talk Description Amplitude analysis can add an extra dimension to seismic interpretation in reducing uncertainty on prospect risk and reservoir characterisation. AVO (amplitude variation with offset) allows the construction of images that can highlight different aspects of the subsurface. Subsequent amplitude inversion can directly estimate reservoir properties. As data quality and algorithms improve and with better cross-discipline integration, quantitative interpretation has an increasing role to play. Amplitude interpretation is inherently uncertain, and results are always ambiguous to some extent. To deal with the integration of disparate data with varying levels of uncertainty, Bayesian methods are increasingly employed within the workflow. Processes to directly estimate facies probabilities from seismic data now commonly make use of a Bayesian framework. This allows geological understanding of the reservoir, no matter how uncertain, to be integrated as prior information. Seismic interpretation, however, remains a contact sport; there are too many unknowns always to allow optimum parameters to be calculated and results will be ambiguous to some extent. Interpreters must use their judgement throughout the process. This requires examination of the data in the form of an image that can provide geological context. The seismic image remains paramount.
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