1 / 26

Shallow reservoir analogues: Comparison of seismic and ground penetrating radar (GPR) imaging

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,

javier
Download Presentation

Shallow reservoir analogues: Comparison of seismic and ground penetrating radar (GPR) imaging

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Shallow reservoir analogues: Comparison of seismic and ground penetrating radar (GPR) imaging Roger Young Associate Professor of Geophysics OU

  2. • 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

  3. 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

  4. -Data available- S N E NW SE NW SE 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

  5. -Results: Synthetic tie- Significance: Interfaces identified on the measured sections can be correlated with GPR data through synthetic radargrams

  6. Significance: GoCAD used to interpolate horizons from a complicated fence diagram

  7. 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

  8. Ramirez, D. M., Young, R.A, 2007, Fracture orientation determination in sedimentary rocks using multicomponent GPR measurements, The Leading Edge, 1010-1016.

  9. Significance: Multicomponent/multi-azimuth GPR data senses fracture orientation in evaporites

  10. 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

  11. Hoyos, J., Young, R.A., 2001, Near-surface, SH-wave surveys in unconsolidated, alluvial sediments, The Leading Edge, 936-948.

  12. Significance: SH-wave reflections are more useful than P-wave reflections

  13. “Old” seismic equipment OU Field Camp (1992-2006)

  14. Raw Data Mute, AGC 75ms window for AGC 75 -6 dB for pre- rasterization gain Example Early Muting and AGC on Line 3 Before NMO After NMO Example NMO Correction on Line 3 – SH-SH data

  15. L1 Line locations of shear-wave surveys at the Abbey. L3 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.

  16. “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

  17. Future work

  18. •DMO and spectral decomposition enhancement of GPR CMP gathers Nate Johnson, Senior thesis CMP/CRP 167_2 CMP/CRP 103

  19. •Seismic characterization of the • Arbuckle-Simpson aquifer Breanne Kennedy, MS thesis (Devon support) • 2D near-surface and exploration-scale seismic data from Hunton anticline • targets: fractures, karst features, pC basement topography • •Rayleigh wave inversion for shear-wave • velocity structure (MASW) Rika Burr, Senior thesis • •GPR/ERT characterization of the • Arbuckle-Simpson aquifer Oswaldo Davogustto, MS thesis

  20. Common Source Gathers Average Apparent Velocities soil profile ~ 363 m/s bedrock ~ 3046 m/s direct arrival refraction reflection Rayleigh waves

  21. Carlos Russian, MS thesis • •S/N enhancement on 3D seismic • cross-spread • F-K, K-L transform methods • •3D multicomponent study of seismic SV waves • record SV-waves on OU seismic system • SV impulsive source, radial component geophones • simple raypath geometry • strong event ?? • compare to similar near-surface and exploration scale surveys

  22. N/S shot gather Apparent Velocity ~ 4733 m/s

  23. SV-wave and P-wave high resolution seismic reflection using vertical impacting and vibrating sources Andre Pugin Susan Pullen James Hunter Geological Survey of Canada

  24. 1.1 Sec 2.2 Sec 3-Component Geophone 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 P-Wave S-Wave Ri Rx P Objectives:

  25. Shot Station 1173-1176 Shot Line 1146 Receiver Line 6213 Receiver Line 6145 Shot Station 1212 Shot Line 1076 Shot Line 1006 Shot Station 1169-1196 hybrid swath 2x2 Test Sourcing And Numbering All have Rx and Ri V V V

  26. 350 ms 700 ms 900 ms Production “P” Migrated 750 ms 1400 ms 1800 ms Production “Shear” Migrated

More Related