Investigating refraction statics methods as a function of geologic complexity

Baixas, F.; Canal, Philippe; Paturet, D.

doi:10.1190/1.1892676

Cited by 2 publications

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“…Baixas et al (1985) classified refraction problems into three types: This implies that several refractors may need to be mapped and that these may change rapidly along the line.…”

Section: Applicability and Choice Of Refraction Interpretation Methodsmentioning

confidence: 99%

“…Baixas et al (1985) and Daly and Diggins (1988), for example, suggested that high-frequency variations in the base of the weathered layer could be indicative of an incorrect near-surface velocity. Redistribution subject to SEG license or copyright; see Terms of Use at http://library.seg.org/ an irregular refractor, a smooth depth profile and an irregular velocity profile, or an intermediate near-surface model-is an interpretive one.…”

Section: Refractor Depth and Near-surface Velocity Ambiguitymentioning

confidence: 99%

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5. Refraction Surveys

Cox¹

1999

Static Corrections for Seismic Reflection Surveys

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Refraction SurveysDownloaded 10/09/15 to 129.78.139.28. Redistribution subject to SEG license or copyright; see Terms of Use at http://library.seg.org/ c c c c c or t z V x z V z V Downloaded 10/09/15 to 129.78.139.28. Redistribution subject to SEG license or copyright; see Terms of Use at http://library.seg.org/ Downloaded 10/09/15 to 129.78.139.28. Redistribution subject to SEG license or copyright; see Terms of Use at http://library.seg.org/ Downloaded 10/09/15 to 129.78.139.28. Redistribution subject to SEG license or copyright; see Terms of Use at http://library.seg.org/Fig. 5-20. Refraction arrival picking using a peak-trough ratio technique: (a) seismic data after removal of the refractor moveout or stepout; (b) display of all peaks and troughs, with the maximum ratio between successive events (the preferred pick) indicated by a thicker line (Chun and Jacewitz, 1981; preprint).

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“…Baixas et al (1985) classified refraction problems into three types: This implies that several refractors may need to be mapped and that these may change rapidly along the line.…”

Section: Applicability and Choice Of Refraction Interpretation Methodsmentioning

confidence: 99%

Section: Refractor Depth and Near-surface Velocity Ambiguitymentioning

confidence: 99%

5. Refraction Surveys

Cox¹

1999

Static Corrections for Seismic Reflection Surveys

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“…Bevc (1991) pointed out that transmitted arrivals which are mistaken for refracted arrivals cause substantial errors in the calculated statics. Also, once the near surface becomes complicated enough to make first arrivals incoherent, standard refraction static methods will fail (Baixas et al, 1985). Musser et al (1986) suggested a technique that utilized cross-correlations between neighboring traces and discussed extending the cross-correlations beyond adjacent traces.…”

Section: Introductionmentioning

confidence: 99%

Statics prediction from cross‐correlations in orthogonal directions

Abma¹

1994

SEG Technical Program Expanded Abstracts 1994

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Traditional reflection statics programs use model traces built from stacks of nearby traces. Using cross-correlations between nearby prestack traces avoids the problems associated with the model building process. Cross-correlations between trace pairs positioned in orthogonal directions with respect to structure, residual NMO, and the shot and receiver terms allow the full statics problem to be separated into three sets of problems. Crosscorrelations are performed in gathers that are independent of, or orthogonal to, one of three parts of the full problem. These simpler problems may be solved individually with greater ease and perhaps with more accuracy than traditional approaches. Since only one term is being predicted within each subset of the problem, this may be considered a signalprocessing problem rather than a matrix-inversion problem. The cross-correlations of neighboring traces may be supplemented with the creation of cross-correlations between traces that are widely separated. These extra cross-correlations may stabilize the problem. Preliminary results on synthetic data appear promising.

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Investigating refraction statics methods as a function of geologic complexity

Cited by 2 publications

References 0 publications

5. Refraction Surveys

5. Refraction Surveys

Statics prediction from cross‐correlations in orthogonal directions

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