Oil & Gas Geology ›› 2010, Vol. 31 ›› Issue (2): 225-231.doi: 10.11743/ogg20100214

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Wavelet effect and recognition methods of thin sand bodies in braided river facies

Huang Junbin1; Gao Lijun2; Gao Yong3; Wang Defa1   

  1. 1.China University of Geosciences; Beijing 100083; China;
    2.Halliburton Digital and Consulting Solutions; Beijing 100004; China; 
    3.Exploration and Development Research Institute; PetroChina Dagang Oilfield Company; Tianjin 300280; China
  • Online:2010-04-26 Published:2010-09-02

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Abstract:

Under a fixed seismic frequency，wavelet side lobes may increase the difficulty of interpreting and recognizing thin sand bodies. To investigate the impacts of wavelet side lobe effects，we design a series of forward models and produce synthetic seismic profiles using zero phase Ricker wavelets of different frequencies. The purpose is to identify the relationship of sand body location and frequency with side lobe effects. This study also aims at exploring the relationship between amplitude attributes and the description of thin sand bodies. The results show that，an integrated use of multiˉfrequency profile and amplitude attributes can reliably interpret and describe thin sand bodies of braided river facies which are thicker than1/8wavelength.

Key words: Ricker wavelet, amplitude attribute, side lobe of wavelet, side lobe effect, thin sand body