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Spectral
AVO
Inversion for
Lithology
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SAIL Combines:
Spectral Decomposition
AVO Analysis
Inversion
Seismic Petrophysics
AVO is an approach that examines the nature of the interfaces
of contrasting rock properties and not the bodies themselves. By
combining AVO with spectral analysis, inversion and seismic
petrophysical principles, SAIL images the lithologic bodies
without input from well control.
- Only input required is prestack migrated gathers
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SAIL Workflow
4 8 16 32 64 Combined
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Spectral AVO Inversion for Lithology
Model Example
Protected by US Patent No. 7,343,245
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Seismic Petrophysics
Lith Syn DT Rhob IP DTSH PR
Modeled
Gathers
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Seismic Petrophysics
Input
LithModeled
Gathers StackAVO
Lithology
Input
Lith
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Seismic Petrophysics
Modeled
Gathers StackAVO
Lithology Lith SAIL
Lithology LithInput
Lith
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Spectral AVO Inversion for Lithology
Example
Protected by US Patent No. 7,343,245
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Gas Gas
Down dip wet sand
Gas
Pre-stack Time Migrated Stack
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Gas Gas
Down dip wet sand
Gas
Spectral AVO Inversion for Lithology
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Gas Gas
Down dip wet sand
Gas
Spectral AVO Types
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Spectral AVO Inversion for Lithology
Example
Protected by US Patent No. 7,343,245
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Stack
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Panel 1 Panel 2 Panel 3 Combined FilteredPanel 4
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Spectral AVO Inversion for Lithology
Results run on the whole line.
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Spectral AVO Types
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SAIL
FAQs
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2,3,100,120 4,8,20,50 4,8,12,20
2,3,100,120
4,8,20,50
4,8,12,20
Amplitude Spectra
SAIL
Well Logs
Stack
Bandlimited Examples
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Wedge Model, Frequency Content 3 – 90 Hz
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Wedge Model, Frequency Content 8 – 35 Hz
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Wedge Model & Gas Contact
3 to 90 Hz 8 to 40 Hz 8 to 15 Hz
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SAIL Lithology Model
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Spectral
AVO
Inversion for
Lithology
