ESCI 444Exploration Geophysics II Reflection Seismic Data Processing

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ESCI 444-Exploration Geophysics IIReflection
Seismic Data Processing
Spring, 2007

• Steve H. Danbom, Ph.D., P.G.
• Adjunct Professor
• Office - Room 206A
• Office Hours By Appointment

Lecture Week 10 Processing seismic
reflections multicomponent data
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For isotropic conditions, multicomponent data for
a reflection with no dip would be active on Z
component only.
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For isotropic conditions, multicomponent data for
a reflection on a dip line with steep dip might
be equally active on the X and Z components.
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For isotropic conditions, multicomponent data for
a reflection on a dip line with slight dip would
be active on X Z components.
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For isotropic conditions, multicomponent data for
a reflection on an oblique line with steep dip
might be equally active on the X, Y and Z
components.
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Figure showing the use of the hodogram plot,
which shows particle motion of an arriving signal
event as a function of time.
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Each dot in the hodogram plot shows the amplitude
on component 1 plotted against the amplitude on
component 2 for each time sample of the signal.
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More discussion on the use of the hodogram.
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New axes after rotation to maximize energy on
component 1.
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At the CSEG talkI discussed this framework for
operating
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Does anybody in the audience remember the SEG
Delphi Survey?
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Some of the results from the SEG Delphi Survey.
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3C Land Acquisition
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3C Marine OBS Acquisition
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Rotating Recorded 3C Data
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Common Receiver Gather (Before)
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Source-Centered Cylindrical Coordinates
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Common Receiver Gather (After)
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Stacks as f(azimuth)
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TLE November, 1999
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Section Introduction
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Suggested Reading

• Converted-Wave Imaging of the Valhall
  Reservoir, by Thomsen, et al., 1997 EAEG
  Meeting.
• Processing of P-Sv Surface-Seismic Data
  Anisotropy Analysis, Dip-Moveout and Migration,
  by Harrison, 1992 Doctorial Dissertation, The
  University of Calgary.
• Multicomponent Vp/Vs Correlation Analysis, by
  Gaiser, Geophysics, 1996, 61, 1137-1149.
• Rapid Map and Inversion of P-Sv Waves, by
  Stewart, Geophysics, 1991, 56, 859-862.