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Seismic Reflection: Processing and Interpretation
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Objectives. Develop a velocity model of the Santa Fe River Canyon to aid in structure interpretationUse predictive deconvolution to remove multiple reflections from the data . Processing Steps. Processing Steps. Defining Geometry. . Processing Steps. Killing Traces. Vibroseis signal had to be eliminatedChannels showing large amounts of noise were deleted. 
Seismic Reflection: Processing and Interpretation
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1. Seismic Reflection: Processing and Interpretation Katie Wooddell
UW Madison
2. Objectives Develop a velocity model of the Santa Fe River Canyon to aid in structure interpretation
Use predictive deconvolution to remove multiple reflections from the data
3. Processing Steps
4. Processing Steps
5. Defining Geometry
6. Processing Steps
7. Killing Traces
Vibroseis signal had to be eliminated
Channels showing large amounts of noise were deleted
8. Processing Steps
9. Predictive Deconvolution What does it do?
Clears seismic data by predicting and eliminating multiple reflections
How does it work?
A filter is designed that recognizes and eliminates repetitions in the signal
10. Deconvolution Equation
11. To Conceptualize. . .
12. Deconvolution Results
13. Processing Steps
14. Butterworth Filter Bandpass Filter
Passes frequencies in the range of the vibroseis sweep (30-300 Hz)
Effective in eliminating the noise amplified during predictive deconvolution
15. Butterworth Filtering
16. Processing Steps
17. Processing Steps
18. NMO Correction NMO corrects for the delay in first arrival times
NMO shifts the arrival times according to a specific stacking velocity
This is an important step in the velocity analysis
19. Processing Steps
20. Velocity Analysis A Constant Velocity Analysis was conducted on both deconvolved and non-deconvolved data
The following NMO stacking velocities were run for each situation:
- 1000 m/s -1200 m/s
- 1400 m/s -1600 m/s
- 1800 m/s -2000 m/s
- 2200 m/s -2400 m/s
21. Conclusions Predictive deconvolution is an effective tool for eliminating multiples from seismic data
A combination of the 2000 m/s and the 1600 m/s constant velocity models seems to produce a high resolution model
This implies a higher average velocity medium on the east side of the fault, giving evidence that the normal La Bajada fault is being imaged
22. And a Special Thanks To. . . The SAGE professors for their knowledge and patience
Team 5 for their hard work and some good times
Michelle Herrera, my Processing partner
Lauren Larkin, who was more enthusiastic about splicing together my seismic sections than I was
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Seismic Reflection: Processing and Interpretation - Objectives. Develop a velocity model of the Santa Fe River Canyon to aid in structure interpretationUse predictive deconvolution to remove multiple reflections from the data . Processing Steps. Processing Steps. Defining Geometry. . Processing Steps. Killing Traces. Vibroseis signal had to be eliminatedChannels showing large amounts of noise were deleted.
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Seismic Reflection Processing Illustrations The Stacking Chart and Normal Moveout -
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