Summary
Seismic impedance inversion refers to the use of stacked seismic data inversion technology. It’s one of the important means to the reservoir characterization description and reservoir studies. It combines seismic data, well log data and geological interpretation, making full use of the characteristics which logging data with higher vertical resolution and seismic section with good lateral continuity. Convert seismic section into a wave impedance profile, It has become an indispensable interpretation processing technology in interpretation technique. Now there are many kinds of seismic impedance inversion methods, however, these methods have different applicable conditions. the seismic impedance inversion technique and method which based on model has obvious advantages, it use the drilling, geological data and parameters to establish the geological model, inverse under the constraints of the geological model, To obtain the corresponding wave impedance data volume, the analysis based on data volume can predict lithology. With the deepening of quantitative applications, the inversion accuracy gradually attracted attention. Many people have conducted in-depth study of influence the factors of seismic impedance inversion based on model precision, including the input seismic data quality, inversion algorithm, wavelet estimation accuracy, the inversion of multiple solutions and other aspects, it made a lot of progress and understanding. But less discussion of determining the inversion of the key success factors-the influence of the initial model for final inversion result .Based on it, this paper uses the model method to eliminate other factors under the premise of inversion accuracy influence, focus on the analysis of the initial model differences and the effects of different participate in inversion on the final inversion accuracy, finally this paper puts forward some suggestions to improve the inversion accuracy.
