Modern Seismic Concepts For

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Modern Seismic Concepts For Geothermal Projects
TRAPPE, GIERSE, FREHERS, PRUESSMANN TEEC,
Germany
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Modern Seismic Concepts For Geothermal Projects
Outline Seismic porosity facies
prediction Fracture prediction Cost efficient 3D
seismic data aquisition
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Modern Seismic Concepts For Geothermal Projects
Mapping porosity and facies distribution
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neuroTEEC seismic facies classification
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neuroTEEC Seismic Facies Classification
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Amplitude Bright Spot Seismic Inversion
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3D Modelling Porosity Distribution
A 3D porosity model based on seismic information
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Definition of compartments / small scale faults
and fractures
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cohTEEC coherency processing
Size 21 x 11 km
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cohTEEC coherency processing
Size 6 x 7 km
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IHS display at Top A2
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Normalized fracture density after cokriging
Cokriging result
Poor data quality area(salt dome)
Normalized fracture density (FMI)
Poor data quality area(salt dome)
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Sparse 3D Seismic
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CRS theory
RN
RNIP
NIP
R
Normal Incidence Point
Reflector segment
(Mann et al., 1999)
Experiment 1 Point source at NIP - Emergence
angle a - Wavefront curvature RNIP
Experiment 2 Exploding reflector R - Emergence
angle a - Wavefront curvature RN
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Comparison of CRS results

• Improved imaging due to higher stack fold
• Reduction of near surface data gaps related to
  mute

CRS
DMO
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DMO / CRS subset 3
CRS (2 sr-line)
DMO
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Conclusion
Modern Seismic Concepts For Geothermal Projects

• Proven concepts exists for Porosity and Facies
  Prediction
• Workflows are available for quantitative fracture
  prediction
• CRS technology allows for 3D seismic acquisition
  even with limited budget