spectral avo inversion for lithology sail.ppt

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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