关键词: 合成声波测井, 反褶积, 相位校正, 低频模型, 层位标定, 储层研究

Abstract: Velocity is an important lithologic parameter,which can be extracted from seismic traces by reversing the procedure used to model synthetic seismic traces from sonic logs.The technique of extracting sonic log information from seismic traces is called synthetic sonic logs.The field seismic data are broad band wavelet processed to a reasonable approximation of reflection coefficients,corrected for density,reverse modeled,and suitable scaled,the result of higher frequency velocity coefficients can be used to modulate the lower frequency information derived from velocity data to produce a synthetic sonic log.Synthetic sonic logs is an advanced technique of seismic inversion,it converses velocity boundaries of the seismic trace to lithologic layers of the sonic logs.The sonic log form of information maps individual lithologic units as they appear on the sonic logs,making the data more readily comparable to other geologic information.From well to exterior field,the space location,isopach and physical properties of reservoir can be predicted based on the research of lithogic units.Thus,optimizing reservoir evaluation would enhance the efficiency of exploration and development in oil and gas field.

Key words: synthetic sonic logs, deconvolution, phase calibration, lower frequency model, layer identification, reservoir research