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Geophysical Data Processing
Leonardo Azevedo
Lecture #1 17 Sep. 2014
Introduction and Seismic Method
1Leonardo Azevedo, 2014
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CERENA room: 2.1.11
Office hours: Wednesday from 3PM to 5PM
Grades:
70% - 2 tests during the semester OR Final Exam
30% - Assignment to be developed during the semester
mailto:[email protected]
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Exploration workflow
Seismic Acquisition
Data Interpretation
Data Processing
Reservoir Modeling
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What is seismic processing
noise
hyperbolas
Acquisition
Recorded
raw data Final section for interpretation
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Seismic Method: Theoretical Background
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Seismic Method: Reflection Coefficients and Acoustic Impedance
Acoustic Impedance (Z)=density * velocityZ2-Z1
Z2+Z1Reflection Coefficient (RC)=
Herron (2011) Leonardo Azevedo, 2014
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Basic Processing Sequence
Improve signal quality: Increase signal-to-noise ratio
Remove source effect
Filter out noise
Time Correction
Sum traces
Spatial Correction
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Basic Processing Sequence
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Basic Processing Sequence: deconvolution
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Basic Processing Sequence: filtering
Land data ground roll
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Basic Processing Sequence: filtering
Marine data swell
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PS-wave stack profiles, in which (a) PS-wave stack profile without receiver static corrections, (b) PS-wave stack profile with
receiver static corrections and (c) PS-wave stack profile with PS-wave static and residual static corrections.
Basic Processing Sequence: statics correction
Chunying Yang, Yun Wang & Jun Lu, 2012, Application of Rayleigh waves on PS-wave static corrections, Journal of Geophysics and Engineering, 9,1.
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Basic Processing Sequence: migration