Abstract:

During the processing of seismic data interpretation of Tahe Oilfield,pseudomorphism of adjoint phase caused by non zero phase wavelet was easily interpreted as effective reflection.It was necessary to extract impedance reflectivity based on environmental correction of sonic and density data, to extract actual non zero phase wavelet from seismic trace by comparing synthetic seismographic record with seismic trace near wells, and process seismic data with wavelet deconvolution. The processed seismic data had clear reflection character, high resolution and eliminated the pseudomorphism caused by non zero phase wavelet. The variance of coherency on the basis of processed seismic data showed clearly the characteristics of karst phenomenon on the top of Ordovician.

Key words: wavelet deconvolution, non zero phase wavelet, adjoint phase, environmental correction, Tahe Oilfield