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Seismic interferometry-by-deconvolution for controlled-source and passive data Kees Wapenaar, Joost van der Neut, Elmer Ruigrok, Deyan Draganov, Juerg Hunzicker, Evert Slob, Jan Thorbecke 70 th annual EAGE meeting June 11, 2008 Rome. Contents.
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Seismic interferometry-by-deconvolution for controlled-source and passive data Kees Wapenaar, Joost van der Neut, Elmer Ruigrok, Deyan Draganov, Juerg Hunzicker, Evert Slob, Jan Thorbecke 70th annual EAGE meeting June 11, 2008 Rome
Contents • Review of seismic interferometry by cross-correlation • Seismic interferometry by deconvolution • Introduction • Theory • Controlled-source data (‘virtual source’) • Passive data (surface wave retrieval) • Passive data (transmission-to-reflection) • Theory (revisited) • Conclusions
Contents • Review of seismic interferometry by cross-correlation • Seismic interferometry by deconvolution • Introduction • Theory • Controlled-source data (‘virtual source’) • Passive data (surface wave retrieval) • Passive data (transmission-to-reflection) • Theory (revisited) • Conclusions
Seismic interferometry by cross-correlation Uncorrelated noise sources
Seismic interferometry by cross-correlation Cross-correlation virtual source target
The correlation function is in a specific way related to the Green’s function e.g. Seismic interferometry by cross-correlation Summary:
Seismic interferometry by cross-correlation • Properties: • Requires no knowledge about sources and medium • Trace-by-trace process • Sources on closed surface (except on free surface) • Sensitive to irregular source distribution • Medium is assumed lossless
Contents • Review of seismic interferometry by cross-correlation • Seismic interferometry by deconvolution • Introduction • Theory • Controlled-source data (‘virtual source’) • Passive data (surface wave retrieval) • Passive data (transmission-to-reflection) • Theory (revisited) • Conclusions
Correlation approach: Deconvolution approach:
Correlation approach: data data Deconvolution approach: data data
Correlation function Deconvolution function Correlation approach: data data Deconvolution approach: data data
Seismic interferometry by deconvolution Downgoing wavefield P+ Upgoing wavefield P- Reflection response R+ target (reservoir) Wapenaar and Verschuur, 1996, Delphi Amundsen, 1999, SEG, Wapenaar et al., 2000, SEG Holvik and Amundsen, 2005, Geophysics Schuster et al., 2006, Geophysics
Seismic interferometry by deconvolution OBC example (1996)
Contents • Review of seismic interferometry by cross-correlation • Seismic interferometry by deconvolution • Introduction • Theory • Controlled-source data (‘virtual source’) • Passive data (surface wave retrieval) • Passive data (transmission-to-reflection) • Theory (revisited) • Conclusions
Deconvolution approach: Correlation approach:
Correlation approach: Deconvolution approach:
Correlation approach: Deconvolution approach:
Correlation approach: Deconvolution approach:
Contents • Review of seismic interferometry by cross-correlation • Seismic interferometry by deconvolution • Introduction • Theory • Controlled-source data (‘virtual source’) • Passive data (surface wave retrieval) • Passive data (transmission-to-reflection) • Theory (revisited) • Conclusions
van der Neut et al., Thursday 14:55 P272
Cross-Correlation PP reflection black = directly modeled red = retrieved
Deconvolution PP reflection black = directly modeled red = retrieved
Cross-Correlation PP reflection directly modeled black = directly modeled red = retrieved retrieved
Deconvolution PP reflection directly modeled black = directly modeled red = retrieved retrieved
Cross-Correlation PS reflection black = directly modeled red = retrieved
Deconvolution PS reflection black = directly modeled red = retrieved
Cross-Correlation PS reflection directly modeled black = directly modeled red = retrieved retrieved
Deconvolution PS reflection directly modeled black = directly modeled red = retrieved retrieved
Contents • Review of seismic interferometry by cross-correlation • Seismic interferometry by deconvolution • Introduction • Theory • Controlled-source data (‘virtual source’) • Passive data (surface wave retrieval) • Passive data (transmission-to-reflection) • Theory (revisited) • Conclusions
Contents • Review of seismic interferometry by cross-correlation • Seismic interferometry by deconvolution • Introduction • Theory • Controlled-source data (‘virtual source’) • Passive data (surface wave retrieval) • Passive data (transmission-to-reflection) • Theory (revisited) • Conclusions
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t (s) Cross-correlation (a) Correlation
t (s) Deconvolution (b) Deconvolution
Ground Truth: Cross-correlation: