Lithologic Reservoirs ›› 2012, Vol. 24 ›› Issue (4): 75-79.doi: 10.3969/j.issn.1673-8926.2012.04.014

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Application of wavelet analysis and grey system theory to sedimentary microfacies identification: An example from Chang 21 reservoir in the Fengfuchuan Oilfield, Ordos Basin

YANG Jiao1， LIU Tao1， BAI Yaowen2， LI Na3   

  1. 1. Research Institute of Yanchang Petroleum（Group） Company Ltd.， Xi’an 710075， China； 2. Dingbian Oil Production Plant， Yanchang Oilfield Company Ltd.， Yulin 718600， China； 3. Shaanxi Coalfield Geology Bureau Investigation Research Institute， Xi’an 710054， China
  • Online:2012-08-20 Published:2012-08-20

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Abstract:

Because of complex geologic characteristics of Fengfuchuan oilfield, it is difficult to identify sedimentary microfacies by conventional approach. In order to solve this problem, wavelet analysis technique was used to carry out stratigraphic division and establish stratigraphic sequence. Based on the grey system technique, the evaluation parameters, criterion and weight coefficient which are suitable for the study area were chosen to identify sedimentary microfacies. The result shows that the first using of wavelet analysis and grey theory to sedimentary microfacies identification in Fengfuchuan Oilfield achieved good results, and it provides a feasible method to sedimentary microfacies research and can service for development adjustment of oilfield.

Key words: high temperature and high pressure, porous media, diffusion coefficient, condensate oil, heavy crude oil

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