3-D AVO processing: Evolution of a processing sequence
- CGG, Feltham (United Kingdom)
- British Petroleum Exploration, Aberdeen (United Kingdom)
- British Petroleum, London (United Kingdom)
The use of seismic amplitudes has long been recognized as an important aid in the location of hydrocarbons. More recently, this has been extended to include the study of the variations of amplitude as the shot-receiver offset is changed. Here the authors present a case history outlining the development of an AVO processing sequence for application to 3D data sets, including the use of prestack 3D target oriented time migration. AVO attributes at different points in the processing sequence are compared. Successive improvements in the AVO response (both in the RO and gradient seismic sections) demonstrate the advantage of focusing diffraction energy in the CMP gathers prior to estimation of the AVO response. The effect of surface-related multiple energy and its removal is also addressed, comparing a conventional FK demultiple approach with that of the parabolic tau-p transform. Measures of statistical reliability of the AVO results are considered with comparisons of statistical measures being made at various stages of the imaging and multiple suppression. For example, the correlation coefficient associated with least-squares fitting shows an improvement for certain horizons after in-line migration, and further improvement after subsequent interpolation and cross-line migration.
- OSTI ID:
- 93116
- Report Number(s):
- CONF-941015--
- Country of Publication:
- United States
- Language:
- English
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