Integrating long- and short-wavelength statics with the generalized reciprocal method and the refraction convolution section FN1

Derecke Palmer; James Shadlow

doi:10.1071/EG08019

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

Integrating long- and short-wavelength statics with the generalized reciprocal method and the refraction convolution section FN1
Authors Derecke Palmer^a,c and James Shadlow^a,b
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^a School of Biological, Earth and Environmental Sciences, The University of New South Wales, Sydney 2052, Australia. ^b Present address: Australian Worldwide Exploration, Level 9, 60 Miller Street, North Sydney, NSW 2060, Australia. ^c Corresponding author. Email: [email protected]
Publisher: Australian Society of Exploration Geophysicists
Source: Exploration Geophysics, Volume 39, Issue 3, Sep 2008, p. 139 - 147
DOI: https://doi.org/10.1071/EG08019
- Received: 02 Nov 2007
- Accepted: 08 Aug 2008
- Published online: 01 Sep 2008

Abstract

Statics, the corrections for variations in the elevation of the ground surface and for the weathered layer, represent the major challenge to improving the resolution of land seismic reflection data. This study describes a simple approach to determining long- and short-wavelength refraction statics that are generally accurate to a few milliseconds with good quality data. The approach employs the generalized reciprocal method (GRM) and the refraction convolution section (RCS).

The resolution achieved with the GRM and RCS is comparable to that achieved with the delay-time method (DTM) together with one application of residual statics. Furthermore, a comparison with a coincident set of data recorded with different acquisition parameters shows that there is a long-wavelength static error with the DTM but not the GRM.

There is a limit in the lateral resolution of variations in the base of the weathering, which is demonstrated with triplications or ‘frowns’ in the shot records. However, the statics model also exhibits short-wavelength variations, which suggest a resolution considerably greater than that indicated to be possible by the ‘frowns’. This study proposes that the long-wavelength component represents the variations in the time model of the weathering, which are caused by gross variations in the thickness of the weathered layer, while the short-wavelength components represent the variations in the surface soil layers.

With the data used in this study, variations of more than 10 ms in the time model of the weathering were observed over distances of 10 m. Such variations result in similar intra-array statics with receiver arrays over comparable distances. These intra-array statics are a major cause of reduced resolution of reflection data and poor signal-to-noise ratios with first-break refraction data, especially in arid regions. Poor quality refraction data are the major impediment to obtaining accurate refraction statics.

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References

Ait-Messaoud M. , Boulegroun M.-Z. , Gribi A. , Kasmi R. , Touami M. et al 2005, New dimensions in land seismic technology: Oilfield Review Autumn 2005, 42–53. [Web document]. Available at: http://www.westerngeco.com/media/resources/articles/q_land_oilfield_review_autumn05.pdf (Accessed 9 August 2008)
Barton R. Barker N. 2003 Velocity imaging by tau-p transformation of refracted traveltimes: Geophysical Prospecting 51 195 203 doi:10.1046/j.1365-2478.2003.00365.x
[Google Scholar]
Cox M. 1999, Statics corrections for seismic reflection surveys: Society of Exploration Geophysicists, 531 pp.
de Franco R. 2005 Multi-refractor imaging with stacked refraction convolution section: Geophysical Prospecting 53 335 348 doi:10.1111/j.1365-2478.2005.00478.x
[Google Scholar]
Drijkoningen G. G. 2000 The usefulness of geophone ground-coupling experiments to seismic data: Geophysics 65 1780 1787 doi:10.1190/1.1444862
[Google Scholar]
Glen R. A. , Korsch R. J. , Jones L. E. A. , and Johnston D. W. 2000, Seismic evidence for a major arc-back arc collision in the Lachlan Orogen: 15th Australian Geological Convention, Geological Society of Australia, 59, 117.
Palmer D. 1980, The generalized reciprocal method of seismic refraction interpretation Society of Exploration Geophysicists, 104 pp.
Palmer D. 1981 An introduction to the generalized reciprocal method of seismic refraction interpretation: Geophysics 46 1508 1518 doi:10.1190/1.1441157
[Google Scholar]
Palmer D. 1986, Refraction seismics: the lateral resolution of structure and seismic velocity Geophysical Press.
Palmer D. 2001 a Imaging refractors with the convolution section: Geophysics 66 1582 1589 doi:10.1190/1.1487103
[Google Scholar]
Palmer D. 2001 b Resolving refractor ambiguities with amplitudes: Geophysics 66 1590 1593 doi:10.1190/1.1487104
[Google Scholar]
Palmer D. 2006 Refraction traveltime and amplitude corrections for very near-surface inhomogeneities: Geophysical Prospecting 54 589 604
[Google Scholar]
Palmer D. 2008 Is it time to re-engineer geotechnical seismic refraction methods? First Break 26 8 69 77
[Google Scholar]
Palmer D. Nikrouz R. Spyrou A. 2005 Statics corrections for shallow seismic refraction data: Exploration Geophysics 36 7 17 doi:10.1071/EG05007
[Google Scholar]
Palmer D. Jones L. 2005 A simple approach to refraction statics with the generalized reciprocal method and the refraction convolution section: Exploration Geophysics 36 18 25 doi:10.1071/EG05018
[Google Scholar]
Taner M. T. Wagner D. E. Baysal E. Lee L. 1998 A unified method for 2-D and 3-D refraction statics: Geophysics 63 260 274 doi:10.1190/1.1444320
[Google Scholar]

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Integrating long- and short-wavelength statics with the generalized reciprocal method and the refraction convolution section FN1

Exploration Geophysics 39, 139 (2008); https://doi.org/10.1071/EG08019

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Article Type: Research Article

Keyword(s): delay-time method, Generalized Reciprocal Method, Refraction Convolution Section, seismic reflection processing, statics corrections.

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Integrating long- and short-wavelength statics with the generalized reciprocal method and the refraction convolution section FN1

Abstract

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