Frequency and phase controllable deconvolution technique and its application
Li Da-wei1,2, He Yan3, Zhong Ping1
1. Geophysical Prospecting Company, CNPC Chuanqing Drilling Engineering Company Limited, Chengdu City, Sichuan Province, 610213, China;
2. Chengdu Institute of Technology, Chengdu City, Sichuan Province, 610059, China;
3. Institute of Mathematics and Information, West China Normal University, Nanchong City, Sichuan Province, 637002, China
Abstract：With the help of signal autocorrelation Toeplitz matrix in routine deconvolution algorithm,based on estimated inverse filtering factor and by integrating phase processing and deconvolution theory in seismology,a practical frequency and phase controllable deconvolution algorithm was derived in this paper. The processing process in the algorithm contains two parts,the signal phase processing and signal replacement processing. During signal deconvolution the signal's frequency and phase were replaced through defining ideal wavelet with arbitrary frequency and phase to construct matrix,as a result the characteristics of the frequency and phase of the seismic data were modified. In the processing above,no extra noise added but the vertical resolution of the signals was raised to maximum value. In addition,the phase processing was involved in estimating inverse filtering factor,which violates the minimum phase assumption in routine deconvolution but removes phase limitation during estimating inverse filtering factor,in this way blind Deconvolution for arbitrary signals was truly realized. Simulating test and field data processing results show that during replacement process the seismic section's resolution increases with the wavelet frequency 's increase,but the signal to noise ratio is not decreased,the effects caused by waveform difference alleviates with the replaced wavelet's frequency's increase,and there is no big energy change before and after deconvolution,all of those results mentioned above demonstrated that the technique has a excellent amplitude-preserving property,it will have a bright future in application and development.
李大卫, 何艳, 钟萍. 频率、相位可控的反褶积技术及其应用[J]. 石油地球物理勘探, 2009, 44(6): 703-707.
Li Da-wei, He Yan, Zhong Ping. Frequency and phase controllable deconvolution technique and its application. OGP, 2009, 44(6): 703-707.
