Shallow reservoir analogues:
This presentation is the property of its rightful owner.
Sponsored Links
1 / 26

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


  • 118 Views
  • Uploaded on
  • Presentation posted in: General

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,

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.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


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,

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


-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


-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)


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


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.


“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


Future work


  • •DMO and spectral decomposition enhancement of GPR CMP gathers

Nate Johnson, Senior thesis

CMP/CRP 167_2

CMP/CRP 103


  • •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


Common Source Gathers

Average Apparent Velocities

soil profile ~ 363 m/s

bedrock ~ 3046 m/s

direct arrival

refraction

reflection

Rayleigh waves


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


N/S shot gather

Apparent Velocity ~ 4733 m/s


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


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:


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


350 ms

700 ms

900 ms

Production “P” Migrated

750 ms

1400 ms

1800 ms

Production “Shear” Migrated


  • Login