Shallow reservoir analogues: Comparison of seismic and ground penetrating radar (GPR) imaging Roger Young Associate Professor of Geophysics OU. • GPR uses wavefield processing similar to seismic methods • My students have mostly been MS and/or undergraduates • Field projects,
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Shallow reservoir analogues:
ground penetrating radar (GPR)
Associate Professor of Geophysics
•GPR uses wavefield processing similar to seismic methods
•My students have mostly been MS and/or undergraduates
• Field projects,
data reduction using commercial software
(mostly Ekko-Pro, SPW, ProMAX, Kingdom Suite)
•Early proponent of 3D GPR surveys
Young, R.A., Deng, Z., Marfurt, K.J., Nissen, S.E, 1996, 3-D dip filtering and coherence appliedto GPR data: A study, The Leading Edge, 1011-1018.
Significance: Seismic attributes characterize fluvial-deltaic channels
on 3D GPR data
Correa-Correa, H., Young, R.A., Slatt, R.M., 2006, 3-D Characterization of a channel system in an outcrop reservoir analog derived from GPR and measured sections, Rattlesnake Ridge, Wyoming, SEG Expanded Abstract
-Results: Synthetic tie-
Significance: Interfaces identified on the measured sections can be correlated with GPR data through synthetic radargrams
Significance: GoCAD used to interpolate horizons from a complicated fence diagram
Young, R.A., Staggs, J.G., and Slatt, R.M., van Dam, R., 2007, Application of 1-D convolutional modeling to interpretation of GPR profiles –turbidite Sandstone 1, Lewis shale, Wyoming, JEEG, 12, 3, 241-254.
Significance: Convolutional modeling constrained by lab and outcrop measurements identifies GPR reflection events
Ramirez, D. M., Young, R.A, 2007, Fracture orientation determination in sedimentary rocks using multicomponent GPR measurements, The Leading Edge, 1010-1016.
Significance: Multicomponent/multi-azimuth GPR data senses fracture orientation in evaporites
Geerdes, I., Young, R.A., 2007, Spectral decomposition of 3D GPR data from an alluvial environment, The Leading Edge, 1024-1030.
Significance: Spectral decomposition of GPR data
reveals tuning in a sand wedge
Hoyos, J., Young, R.A., 2001, Near-surface, SH-wave surveys in unconsolidated, alluvial sediments, The Leading Edge, 936-948.
Significance: SH-wave reflections are more useful than P-wave reflections
“Old” seismic equipment
OU Field Camp (1992-2006)
75ms window for AGC 75
-6 dB for pre- rasterization gain
Example Early Muting and AGC on Line 3
Example NMO Correction on Line 3 – SH-SH data
Line locations of shear-wave surveys
at the Abbey.
Tie between Line 3 and Line 1
3D View of horizons picked in the seismic grid from the Abbey.
Top and bottom of the Pierre Shale are the two shallowest horizons.
“New” seismic field equipment
2 24-Channel Geodes
48 channel (.52 m takeout spacing) cable
48 channel (4.0 m takeout spacing) cable
24 channel downhole hydrophone array
52 28-Hz vertical geophones
48 40-Hz vertical geophones
Through the Incorporated Research Institutions in Seismology (IRIS),
we could borrow NN additional channels of recording capability, IVI mini-vibrator
Significance: Potential to record vertical, radial, and transverse component data using “P”, “SV”, and “SH” sources and to jump from 2D to 3D
Nate Johnson, Senior thesis
Breanne Kennedy, MS thesis (Devon support)
• 2D near-surface and exploration-scale seismic data from
fractures, karst features, pC basement topography
Rika Burr, Senior thesis
Oswaldo Davogustto, MS thesis
Common Source Gathers
Average Apparent Velocities
soil profile ~ 363 m/s
bedrock ~ 3046 m/s
Carlos Russian, MS thesis
N/S shot gather
Apparent Velocity ~ 4733 m/s
SV-wave and P-wave high resolution seismic reflection using vertical impacting and vibrating sources
Geological Survey of Canada
A Practical Approach to a 3D Multi-Component Seismic ProjectAlison Small (Parallel Petroleum Corp)J.W. (Tom) Thomas (Dawson Geophysical)Seth H. Conway (Dawson Geophysical)SEG 2007 presentation
Shot Line 1146
Receiver Line 6213
Receiver Line 6145
Shot Line 1076
Shot Line 1006
Test Sourcing And Numbering
All have Rx and Ri
Production “P” Migrated
Production “Shear” Migrated