Rock physics, trend curves and flat-spots

Jacques P. Leveille; Kenton Prindle; John Smallwood; Jonathan Smith

doi:10.1071/ASEG2007ab073

ISSN: 2202-0586
E-ISSN:

oa Rock physics, trend curves and flat-spots
Authors Jacques P. Leveille^a, Kenton Prindle^b, John Smallwood^c and Jonathan Smith^d
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^a Hess Corporation, One Allen Center 500 Dallas Street, Houston, Texas 772002, , USA, [email protected] ^b Hess Corporation, One Allen Center 500 Dallas Street, Houston, Texas 772002, , USA, [email protected] ^c Hess Corporation, Level 9, 1-11 John Adam St London, , WC2N 6AG, , UK, [email protected] ^d Hess Corporation, Level 9, 1-11 John Adam St London, , WC2N 6AG, , UK, [email protected]
Publisher: Australian Society of Exploration Geophysicists
Source: ASEG Extended Abstracts, Volume 2007, Issue ASEG2007 - 19th Geophysical Conference, Dec 2007, p. 1 - 4
DOI: https://doi.org/10.1071/ASEG2007ab073
- Published online: 01 Dec 2007

Abstract

Summary

Seismic amplitudes and AVO have been used successfully in exploration worldwide. We present a general geologically-based methodology to characterize the expected amplitude and AVO behaviours of reservoirs and seal facies in a basin. We produce a rock physics model based on well data and consistent with the geological model for the basin. The result is summarized in a series of depth trend curves for rock properties and anticipated seismic responses, illustrated here with data from the West of Shetlands, UK, to predict amplitude and AVO responses throughout the basin. A by-product of the technique is the verification of the validity of the amplitude changes and flat-spots which can result from physical property changes across fluid interfaces. For example, seismic flat-spots cross-cutting dipping stratigraphy are commonly observed within the Triassic Mungaroo Formation of the Exmouth Plateau area of the North Carnarvon Basin. We show techniques for quantifying the consistency of flat-spots in 3D, assessing amplitude conformance with structure in map view and automatically determining fluid contact levels.

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2007-12-01

2026-01-22

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References

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Article Type: Research Article

Keyword(s): AVO; Flat-spot; Rock Physics

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