--> Abstract: The Special Value of Seismic Attributes, by A. R. Brown; #90928 (1999).
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BROWN, ALISTAIR R.
Consulting Reservoir Geophysicist

Abstract: The Special Value of Previous HitSeismicNext Hit Previous HitAttributesNext Hit

Summary

Previous HitSeismicNext Hit Previous HitattributesNext Hit are extracted from a 3-D Previous HitseismicNext Hit data volume for two different purposes: they provide deeper insight and finer detail in pursuit of structure and qualitative stratigraphy and they can also provide reservoir property maps when tied to well control.

The multiplicity of Previous HitattributesNext Hit available today can be classified on the basis of their relationship to time, amplitude, and frequency. Previous HitAttributesNext Hit can also relate to gross properties, the vertical distribution of properties, or a selected value.

Time-derived Previous HitattributesNext Hit help with the details of structural interpretation. Patterns distinguish between geology and Previous HitseismicNext Hit noise. Coherence, residual, dips and azimuth are the most useful Previous HitattributesNext Hit in this category.

Amplitude-derived Previous HitattributesNext Hit help with stratigraphy and reservoir properties. Tracked horizons should be used wherever possible. Composite amplitude is particularly useful. Windowed amplitude can be helpful but is subject to geological contamination. Energy half-time has been successfully used for assessing vertical sand distribution.

Frequency-derived Previous HitattributesNext Hit also help with stratigraphy and reservoir properties but their reliability is uncertain. Geologic frequency is often masked by the frequency of the propagating wavelet. Some case history experiences, however, show that frequency Previous HitattributesTop can be useful in revealing additional layering and thus more reservoir.

AAPG Search and Discovery Article #90928©1999 AAPG Annual Convention, San Antonio, Texas