Bandwidth requirements for shallow, high-resolution seismic reflection

Steve Hearn; Natasha Hendrick

doi:10.1071/ASEG2001ab057

ISSN: 2202-0586
E-ISSN:

oa Bandwidth requirements for shallow, high-resolution seismic reflection
Authors Steve Hearn^a and Natasha Hendrick^b
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^a Velseis Pty Ltd and University of Queensland, [email protected] ^b University of Queensland, , Australia, [email protected]
Publisher: Australian Society of Exploration Geophysicists
Source: ASEG Extended Abstracts, Volume 2001, Issue ASEG2001 - 15th Geophysical Conference, Dec 2001, p. 1 - 4
DOI: https://doi.org/10.1071/ASEG2001ab057
- Published online: 01 Dec 2001

Abstract

The optimum bandwidth for shallow, high-resolution seismic reflection differs from that required for conventional petroleum reflection. An understanding of this issue is essential for correct choice of acquisition instrumentation. Numerical modelling of simple Bowen Basin coal structures illustrates that, for high-resolution imaging, it is important to accurately record all frequencies up to the limit imposed by earth scattering. On the contrary, the seismic image is much less dependent on frequencies at the lower end of the spectrum. These quantitative observations support the use of specialised high-frequency geophones for high-resolution seismic imaging. Synthetic seismic inversion trials demonstrate that, irrespective of the bandwidth of the seismic data, additional low-frequency impedance control is essential for accurate inversion. Inversion provides no compelling argument for the use of conventional petroleum geophones in the high-resolution arena.

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2001-12-01

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References

Hatherly, P., and Zhou, B., 2000, Issues in seismic resolution revealed by numerical models and coal exploration survey results: Proceedings Bowen Basin Symposium 2000, Geological Society Australia, 235-242.
Hearn, S., and Hendrick, N., 2000, Demystifying coal-seismic resolution: A modelling approach: Proceedings Bowen Basin Symposium 2000, Geological Society Australia, 243-248.
Hendrick, N., and Hearn, S., 1993, Evaluation of seismic trace inversion techniques: Exploration Geophysics, 24, 549-560.
Knapp, R.W., and Steeples, D.W, 1986, High-resolution common-depth-point seismic reflection profiling: Instrumentation: Geophysics, 51, 276-282.
Sheriff, R.E., 1991, Encyclopedic Dictionary of Exploration Geophysics: Society of Exploration Geophysicists.
Todoeschuck, J.P., and Jensen, O.G., 1988, Joseph geology and seismic deconvolution: Geophysics, 53, 1410-1414.
Ziolkowski, A., and Lerwill, W.E., 1979, A simple approach to high resolution seismic profiling for coal: Geophysical Prospecting, 27, 360-393.

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Article Type: Research Article

Keyword(s): bandwidth; geophone; high-resolution; inversion; seismic

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oa Bandwidth requirements for shallow, high-resolution seismic reflection

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