Oil & Gas Geology ›› 2005, Vol. 26 ›› Issue (1): 120-124.doi: 10.11743/ogg20050117

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Logging constrained inversion of seismic data in Peng No.2 structure in Bodong sag

Zhu Wei1,2, Ma Pengshan1, Tan Chengjun1, Cheng Zhe1   

  1. 1. Department of Energy Resources, China University of Geosciences, Beijing;
    2. Petroleum Exploration and Development Research Institute of Central-South Company, SINOPEC, Changsha, Hunan
  • Received:2004-12-26 Online:2005-02-25 Published:2012-01-16

Abstract:

Velocity contrast of sandstone and mudstone and the corresponding seismic reflecting horizons in the targeted Guantao Formation are analyzed based on core and lithofacies data and velocity statistics. Through detailed velocity study and seismogeological model analysis, as well as multiple wavelet extractions and repeated and detailed calibrations, the conventional geologic interface profile is inverted into a stratigraphic-lithologic profile. Four low wave impedance intervals are identified which correspond to the following 4 reservoir intervals:(1) 3150-3170m, log interpreted water-and oil-bearing interval in Peng xl2 well; (2) 3215-3250m, log interpreted main oil-bearing interval in Peng xl2 well; (3) 3300-3400m, log interpreted water-oil-bearing interval in Peng xl2 well; (4) 3465-3495m, log interpreted water-oil-bearing interval in Peng xl2 well.

Key words: well log-constrained inversion, wavelet extraction, comprehensive calibration, Bodong sag

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