LITHOLOGIC RESERVOIRS ›› 2015, Vol. 27 ›› Issue (6): 97-103.doi: 10.3969/j.issn.1673-8926.2015.06.013

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Wavelet deconvolution with spatial consistency based on CRP gathers

Ming Jun 1,Liu Lihui 2,Ding Yan 2,Li Cong2   

  1.  1. Tianjin Branch Company , CNOOC , Tianjin 300452 , China ; 2. Beijing Rockstar Oil & Techology Company Ltd. , Beijing 100192 , China
  • Online:2015-12-20 Published:2015-12-20

Abstract:

When poststack wavelet extraction method of cepstrum domain is used for prestack wave extraction of CRP gathers and prestack raising resolution processing, the far and near bandwidth of the gather is not consistent, which influences the spatial consistency of wavelet and the effect of the resolution of prestack wavelet deconvolution. Therefore, this paper improved the wavelet extraction technology by using multi-cepstrum average, made the extraction wavelets have spatial consistency, and combined this improved wavelet extraction technology of cepstrum domain with spectral balance technology, to form a wavelet extraction technology which can keep the bandwidth consistent between the traces. This technology added artificial definition of the output of wavelet deconvolution, which makes it can adapt to prestack extraction frequency processing of the data with low signal to noise ratio.

Key words:  tight oil, main controlling factors, Yanchang Formation, Chang 7 oil reservoir set , Ordos Basin

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