LITHOLOGIC RESERVOIRS ›› 2015, Vol. 27 ›› Issue (6): 104-110.doi: 10.3969/j.issn.1673-8926.2015.06.014

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Recognition and attenuation of multiples in land seismic data

Zhang Yufei 1,Yuan Hao 2   

  1.  1. Geophysics and Oil Resource Institute ， Yangtze University ， Wuhan 430100 ， China ； 2. School of Resources and  Geosciences ， China University of Mining and Technology ， Xuzhou 221116 ， Jiangsu ， China
  • Online:2015-12-20 Published:2015-12-20

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Abstract:

 Multiples in land seismic data and multiples in marine seismic survey could interfere with primary reflections and resulted in low signal to noise ratio of seismic data. However, multiples in land seismic data, unlike multiples in marine seismic data, only contaminate partial continuous common midpoint （CMP） gathers rather than the whole data sets. According to the property of multiples in the land seismic data, seismic reflection characteristics of multiples in velocity spectra, constant-velocity scan sections and normal movement correction gathers were analyzed. The CMP ranges were determined in the seismic data by multiple recognition methods, and the parabolic Radon transform was used to suppress multiples in the NMO gathers with multiples. The results of synthetic and field seismic data processing show that parabolic Radon transform method could suppress the multiples of land seismic data, and does not damage the primary reflections during multiple processing, achieving the effect of fidelity denoising.

Key words: tight oil, resource assessment, EUR distribution analogous method, well control area, ultimate resource, Lucaogou Formation, Santanghu Basin

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