Hammer-induced Seismic Investigations in an Area of Observed Anisotropy

Shane G. Squire; Richard R. Hillis

doi:10.1071/EG995202

ISSN: 0812-3985
E-ISSN: 1834-7533

Hammer-induced Seismic Investigations in an Area of Observed Anisotropy
Authors Shane G. Squire^a and Richard R. Hillis^b
View Affiliations Hide Affiliations

^a Santos Ltd, GPO Box 2319 Adelaide, , S.A., 5000, Phone:(08) 218 5253 (W) (08) 326 4600 (H), Fax (08) 218 5240 ^b Department of Geology and GeophysicsUniversity of Adelaide, S.A., 5005
Publisher: Australian Society of Exploration Geophysicists
Source: Exploration Geophysics, Volume 26, Issue 2-3, Jun 1995, p. 202 - 205
DOI: https://doi.org/10.1071/EG995202
- Published online: 01 Jun 1995

Abstract

A seismic experiment was undertaken in order to investigate the effect of an observed (outcropping) fracture set on shear-wave propagation, and more specifically whether the observed fracture set induced shear-wave birefringence. The source for the experiment was a hammer swung to impact horizontally on a source block coupled to the ground by two large metal pins. Eight three-component geophones recorded arrivals up to 40m offset from the hammer source. Impacts of opposite polarity in the in-line and cross-line direction were differenced in order to maximise S-wave, and minimise P-wave energy. After vector gain, filtering and rotation of the recorded data into in-line and cross-line directions, Alford rotation was undertaken on selected windowed events in order to detect shear-wave birefringence. In-line and cross-line energy is maximised by a co-ordinate rotation to the north - south direction, parallel to the observed fracture direction, suggesting that the observed fracture direction results in an anisotropy that induces shear-wave birefringence.

Article metrics loading...

/content/journals/10.1071/EG995202

1995-06-01

2026-01-23

From This Site

/content/journals/10.1071/EG995202

dcterms_title,dcterms_subject,pub_keyword

-contentType:Journal -contentType:Contributor -contentType:Concept -contentType:Institution

10

5

Full text loading...

References

Alford, R.M., 1986, Shear data in the presence of azimuthal anisotropy: Dilley, Texas: 56th Ann. Mtg., Soc. Expl. Geophys., Expanded Abstracts, 476-479.
Cheng, C.H., 1993, Crack models for a transversely isotropic medium: J. Geophys. Research, 98, 675-684.
Crampin, S., 1985, Evaluation of anisotropy by shear-wave splitting: Geophysics, 50, 142-152.
Crampin, S. and Lovell. J.H., 1991, A decade of shear-wave splitting in the Earth‘s crust: What does it mean? What use can we make of it? and what should we do next?: Geophys. J. Int., 107, 387-407.
Hasbrouck, W.P., 1986, Hammer-induced shear-wave studies: in Domenico, S.N. and Danbom, S.H., Shear-wave exploration: Geophysical Developments #1, Soc. Expl. Geophys., 97-121.
Lawton, D.C. and Bertram, M.B., 1993, Azimuthal responses from some three component geophones: The Leading Edge, 12, 1118-1123.
Martin, M.A. and Davis, T.L., 1987, Shear-wave birefringence: Anew tool for evaluating fractured reservoirs: The Leading Edge, 6, (10), 22-28.
Mueller, M.C., 1992, Using shear-waves to predict lateral variability in vertical fracture intensity: The Leading Edge, 11, (2), 29-35.
Tatham, R.H. and McCormack, M.D., 1991, Multicomponent seismology in petroleum exploration: Soc. Expl. Geophys.
Winterstein, D.F. and Meadows, M.A., 1991, Shear-wave polarisations and subsurface stress directions at Lost Hill field: Geophysics, 56,1331-1348.

/content/journals/10.1071/EG995202

Article Type: Research Article

Keyword(s): fracture direction; hammer source experiment; Shear-wave birefringence

Most Cited This Month Most Cited RSS feed

- A comparison of smooth and blocky inversion methods in 2D electrical imaging surveys
  
  Authors M.H. Loke, Ian Acworth and Torleif Dahlin
- Reverse-Time Migration using the Poynting Vector
  
  Authors Kwangjin Yoon and Kurt J. Marfurt
- SkyTEM–a New High-resolution Helicopter Transient Electromagnetic System
  
  Authors K. I. Sorensen and Esben Auken
- An overview of a highly versatile forward and stable inverse algorithm for airborne, ground-based and borehole electromagnetic and electric data
  
  Authors Esben Auken, Anders Vest Christiansen, Casper Kirkegaard, Gianluca Fiandaca, Cyril Schamper, Ahmad Ali Behroozmand, Andrew Binley, Emil Nielsen, Flemming Effersø, Niels Bøie Christensen, Kurt Sørensen, Nikolaj Foged and Giulio Vignoli
- The Fast Marching Method: An Effective Tool for Tomographic Imaging and Tracking Multiple Phases in Complex Layered Media
  
  Authors Nicholas Rawlinson and Malcolm Sambridge
- 3-D Analytic Signal in the Interpretation of Total Magnetic Field Data at Low Magnetic Latitudes
  
  Authors Ian N. MacLeod, Keith Jones and Ting Fan Dai
- CMP cross-correlation analysis of multi-channel surface-wave data
  
  Authors Koichi Hayashi and Haruhiko Suzuki
- A new direct non-invasive groundwater detection technology for Australia
  
  Authors M. Schirov, A. Legchenko and G. Creer
- 3D inversion of airborne electromagnetic data using a moving footprint
  
  Authors Leif H. Cox, Glenn A. Wilson and Michael S. Zhdanov
- Notes On Rock Magnetization Characteristics In Applied Geophysical Studies
  
  Authors D. A. Clark and J. B. Emerson
More Less

Hammer-induced Seismic Investigations in an Area of Observed Anisotropy

Abstract

Most Read This Month

Most Cited This Month Most Cited RSS feed