Crosswell seismic tomography without ray tracing

Bingwen Du; Larry R. Lines

doi:10.1071/EG00359

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

Crosswell seismic tomography without ray tracing
Authors Bingwen Du^a and Larry R. Lines^b
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^a PGS Australia Pty Ltd IBM Centre, , 1060 Hay Street West Perth, WA, 6005, Telephone: (08) 9320 9091, Facsimile: (08) 9320 9010, E-mail: [email protected] ^b Department of Geology and GeophysicsThe University of Calgary, Calgary, , Alberta, Canada, T2N 1N4, Telephone: +1 403 220 2796, Facsimile: +1 403 284 0074, E-mail: [email protected]
Publisher: Australian Society of Exploration Geophysicists
Source: Exploration Geophysics, Volume 31, Issue 1-2, Mar 2000, p. 359 - 365
DOI: https://doi.org/10.1071/EG00359
- Published online: 01 Mar 2000

Abstract

A tomographic inversion algorithm is applied to invert three crosswell seismic surveys acquired in the Glenn Pool field, Oklahoma. Instead of calculating the raypaths and traveltimes explicitly by standard ray tracing, this algorithm uses a finite-difference eikonal equation solver and minimises the traveltime differences between the observed and calculated P-wave traveltimes in a least square sense. The model is updated by an SIRT-like algorithm. A dynamic a-trimmed mean filter is applied to the cost-function gradient after each iteration. Three constructed velocity tomograms showed good correlation with each other as well as with the sonic logs. However, certain anisotropy artefacts due to the interpreted shale layers were also identified from the residual traveltime maps. This study demonstrated the great potential of crosswell seismic imaging in reservoir development.

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2026-01-17

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References

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Liner, C.L., Bozkurt, G., and Cox, D., 1996, Shooting direction and crosswell seismic acquisition: Geophysics, 61, 1489-1498.
Lines, L. R., 1992, Poor man’s anisotropic traveltime tomography: 62nd Annual Internat. Mtg, Soc. Expl. Geophys., Expanded Abstracts, 92, 83-86.
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Vassiliou, A. A., Liner, C.L., Savage, C.W., Bozkurt, G., and Lines, L.R., 1994, Glenn Pool Project: Initial tomography results: 64th Ann. Int. Mtg., Soc. Expl. Geophys., Expanded Abstracts, 302.
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Article Type: Research Article

Keyword(s): Crosswell; eikonal equation; finite difference; traveltime tomography

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Crosswell seismic tomography without ray tracing

Abstract

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