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Volume 43 Number 2
  • E-ISSN: 1365-2478

Abstract

Abstract

Seismic refractions have different applications in seismic prospecting. The travel‐ times of refracted waves can be observed as first breaks on shot records and used for field static calculation. A new method for constructing a near‐surface model from refraction events is described. It does not require event picking on prestack records and is not based on any approximation of arrival times. It consists of the maximization of the semblance coherence measure computed using shot gathers in a time window along refraction traveltimes. Time curves are generated by ray tracing through the model. The initial model for the inversion was constructed by the intercept‐time method. Apparent velocities and intercept times were taken from a refraction stacked section. Such a section can be obtained by appling linea moveout corrections to common‐shot records. The technique is tested successfully on synthetic and real data. An important application of the proposed method for solving the statics problem is demonstrated.

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2006-04-28
2024-04-26

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References

  1. de AmorimW.N., HubralP. and TygelM.1987). Computing field statics with the help of seismic tomography. Geophysical Prospecting35, 907–919.
    [Google Scholar]
  2. DochertyP.1992). Solving for the thickness and velocity of the weathering layer using 2‐D refraction tomography. Geophysics57, 1307–1318.
    [Google Scholar]
  3. HampsonD. and RussellB.1984. First break interpretation using generalized linear inversion. 54th SEG meeting, Atlanta, Expanded Abstracts, 532–534.
  4. HimmelblauD.M.1972. Applied Nonlinear Programming. 148–155. McGraw‐Hill Book Co.
    [Google Scholar]
  5. LandaE., BeydounW. and TarantolaA.1989). Reference velocity model estimation from prestack wave froms: Coherency optimization by simulated annealing. Geophysics54, 984–990.
    [Google Scholar]
  6. LandaE., KosloffD., KeydarS., KorenZ. and ReshefM.1988). A method for determination of velocity and depth from seismic reflection data. Geophysical Prospecting36, 223–243.
    [Google Scholar]
  7. MuratM. and RudmanA.1992. Automated first arrival picking: a neural network approach. Geophysical Prospecting40, 587–604.
    [Google Scholar]
  8. NormarkE., and MosegaardK.1993). Residual static estimation: scaling temperature using simulated annealing. Geophysical Propecting41, 565–578.
    [Google Scholar]
  9. OlsenK.B.1989). A stable and flexible procedure for the inverse modelling of seismic first arrivals. Geophysical Prospecting37, 455–465.
    [Google Scholar]
  10. PalmerD.1986. Refraction Seismic. Seismic Exploration, vol. 13.Geophysical Press.
    [Google Scholar]
  11. RothmanD.1985. Nonlinear inversion, statistical mechanics and residual statics estimation. Geophysics50, 2784–2796.
    [Google Scholar]
  12. SinghS.1978). An iterative method for detailed depth determination from refraction data for an uneven interface. Geophysical Prospecting26, 303–311.
    [Google Scholar]
  13. RussellB.H.1989. Static correction – A tutorial. Canadian Society of Exploration Geophyscists Recorder, 16–30.
  14. SchniederW. and KuoS.1985. Refraction modeling for static corrections. 55th SEG meeting, Washington, Expanded Abstracts, 295–299.
  15. Spagnolini, U.1991). Adaptive picking of refracted first arrival. Geophysical Prospecting39, 293–312.
    [Google Scholar]
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  • Article Type: Research Article

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