1887
Volume 59, Issue 2
  • E-ISSN: 1365-2478

Abstract

ABSTRACT

In this paper, an improved method is presented to reduce vibrator harmonic distortion, one harmonic at a time and the method is illustrated with both simulated and field data. This method improves on the previous method that treated all the harmonics at once. The significant contribution in this procedure is a considerable reduction for the harmonics without any alteration for the weakest signals possibly present in positive and negative times. The core of the proposed technique depends on an accurate simulation for all the harmonics one by one existing in the positive and negative times of the data after cross‐correlation with the fundamental sweep and then subtracting the simulated harmonics from the original data using an optimization procedure. The steps and mathematical equations of the procedure are explained in detail in the body of the article in the section titled ‘harmonic by harmonic attenuation procedure’. Accordingly, a well‐developed procedure for enhancing the vibroseis data quality in both down‐ and up‐sweep data is illustrated. The procedure was tested on both synthetic and field data sets.

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2010-08-27
2024-04-27
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References

  1. Abd El‐AalA.K.2010. Eliminating upper harmonic noise in vibroseis data via numerical simulation. Geophysical Journal International181, 1499–1509. doi:10.1111/j.1365‐246X.2010.04594.x
    [Google Scholar]
  2. AndersenK.D.1995. Method for cascading sweeps for a seismic vibrator. US Patent 5, 410, 517.
  3. BaetenG. and ZiolkowskiA.1990. The Vibroseis Source . Elsevier.
    [Google Scholar]
  4. BagainiC.2006. Overview of simultaneous vibroseis acquisition methods. 76th SEG meeting, New Orleans , Louisiana , USA , Expanded Abstracts 2006, 70–74.
  5. BagainiC.2009. Acquisition and processing of simultaneous vibroseis data. Geophysical Prospecting58, 81–99. doi:10.1111/j.1365‐2478.2009.00842.x
    [Google Scholar]
  6. Dal MoroG., ScholtzP. and IranpourK.2007. Harmonic Noise Attenuation for Vibroseis Data . GNGTS – 26°, Convegno Nazionale.
    [Google Scholar]
  7. EisnerE.1974. Method for determining optimum seismic pulse. US Patent 3, 815, 704.
  8. HoweD., FosterM., AllenA., JackI., BudderyD., ChoiA. et al. 2009. Independent simultaneous sweeping in Libya – full scale implementation and new developments. 78th SEG meeting, Houston , Texas , USA , Expanded Abstracts, 109–111.
  9. JeffryesB.2002. A method of seismic surveying with overlapping shot times. UK Patent 2 387 226.
  10. LebedevA.V. and BeresnevI.A.2004. Nonlinear distortion of signals radiated by vibroseis sources. Geophysics69, 968–977.
    [Google Scholar]
  11. LiX.‐P.1997. Elimination of ghost noise in vibroseis data by deconvolution. Geophysical Prospecting45, 909–929.
    [Google Scholar]
  12. LiX.‐P., SollnerW. and HubralP.1995. Elimination of harmonic distortion in vibroseis data. Geophysics60, 503–516.
    [Google Scholar]
  13. MartinJ.E.1993. Simultaneous vibroseis recording. Geophysical Prospecting41, 943–967.
    [Google Scholar]
  14. MartinJ.E. and WhiteR.E.1989. Two methods for continuous monitoring of harmonic distortion in vibroseis signals. Geophysical Prospecting37, 851–872.
    [Google Scholar]
  15. MeunierJ. and BianchiT.2002. Harmonic noise reduction opens the way for array size reduction in vibroseis operations. 72nd SEG meeting, Salt Lake City , Utah , USA , Expanded Abstracts, 70–73.
  16. MeunierJ. and BianchiT.2005. Cost‐effective, high‐density vibroseis acquisition. 75th SEG meeting, Houston , Texas , USA , Expanded Abstracts, 44–48.
  17. OkayaA.D., KarageorgiE., McEvillyT.V. and MalinP.E.1992. Removing vibrator induced correlation artifacts by filtering in frequency‐uncorrelated time space. Geophysics57, 916–926.
    [Google Scholar]
  18. PolomU.1997. Elimination of source‐generated noise from correlated vibroseis data (the ‘ghost‐sweep’ problem). Geophysical Prospecting45, 571–591.
    [Google Scholar]
  19. RietschE.1981. Reduction of harmonic distortion in vibratory source records. Geophysical Prospecting29, 178–188.
    [Google Scholar]
  20. RozemondH.J.1996. Slip‐sweep acquisition. 66th SEG meeting, Denver , Colorado , USA , Expanded Abstracts, 64–67.
  21. SaragiotisC., ScholtzP. and BagainiC.2009. On the accuracy of the ground force estimated in vibroseis acquisition. Geophysical Prospecting58, 69–80. doi:10.1111/j.1365‐2478.2009.00851.x
    [Google Scholar]
  22. ScholtzP.2002. Amplitude analysis of harmonics on vibrator generated direct waves. 64th EAGE meeting, Florence , Italy , Z‐99.
  23. SchrodtJ.K.1987. Techniques for improving Vibroseis data. Geophysics52, 469–482.
    [Google Scholar]
  24. SeriffA.J. and KimW.H.1970. The effect of harmonic distortion in the use of vibratory surface sources. Geophysics35, 234–246.
    [Google Scholar]
  25. SilvermanD.1979. Method of three dimensional seismic prospecting. US Patent 4,159,463.
  26. SorkinS.A.1972. Sweep signal seismic exploration. US Patent 3,786,409.
  27. WalkerD.1995. Harmonic resonance structure and chaotic dynamics in the earth‐vibrator system. Geophysical Prospecting43, 487–507.
    [Google Scholar]
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  • Article Type: Research Article
Keyword(s): Correlation; Optimization procedure; Seismic vibrator; Upper harmonics

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