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oa Application of Phase Inversion Deconvolution (PID) in Multiple Attenuation
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, GEO 2010, Mar 2010, cp-248-00428
Abstract
This paper describes the analysis of the continuous alteration of the acoustic waveform propagating<br>through the linear system (earth). Based on results of this analysis, the surface related measurements<br>are described as a convolution of the impulse response of the system with the nonstationary forward<br>wavelet. In Phase Inversion Deconvolution method, we consider a forward wavelet includes all multiple<br>terms generated within the system as well as the energy source signature, absorption, geometrical<br>spreading and the receiver characteristics. The multiples are discriminated from primaries based on the<br>difference between the phase spectrum of the seismic signal and the inverse of the forward wavelet.<br>The conditions of separability of primaries and multiples, and impulse response of system are analyzed<br>and illustrated using wavelets extracted from the real seismic signal in cepstrum domain. We applied<br>this method for real data, which acquired in SW of Iran, and expect that can attenuate the multiples,<br>return the decayed energy to the same level, and remove the source and the receiver properties from<br>the recorded signal. So PID can be one of the primary and essential steps of AVO interpretation and<br>direct gas detection.