MULTIPLE ATTENUATION USING PREDICTIVE TAU-P DECONVOLUTION AND PARABOLIC RADON TRANSFORM

• Main Author: IHSAN RAMDANI (NIM : 12405014), AHMAD
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/20845
• Institution: Institut Teknologi Bandung

Multiples is a seismic wave that reflected more that once before returns to the surface and <br /> <br /> recorded by receivers (1995. Uren, Norman). Multiples become problems in seismic section, because it <br /> <br /> tend to interfere primary reflection signals and can be mistaken for primary reflection events. <br /> <br /> Several method have been developed to attenuate multiples. Some of them are Predictive Tau-P <br /> <br /> Deconvolution and Parabolic Radon Transform. Predictive Tau-P Deconvolution (Tau-P Deconvolution <br /> <br /> in short) using transformation of seismic data from T-X (two way time-offset) domain into Tau-P <br /> <br /> (intercept time-ray parameter) domain. The predictive deconvolution are used in Tau-P domain and then <br /> <br /> the data are inverted back to T-X domain. Parabolic radon transform using transformation of seismic data <br /> <br /> from T-X (two way time-offset) domain into Tau-P (intercept time-moveout parameter) domain. The <br /> <br /> input for Parabolic Radon Transform are NMO corrected gather, and the transformation itself was done <br /> <br /> by using moveout correction parameter. In Radon domain, multiples are attenuated and the data after <br /> <br /> multiple attenuation are inverted back to T-X domain. <br /> <br /> In this final project, multiple attenuation using Predictive Tau-P Deconvolution and Parabolic <br /> <br /> Radon Transform was done to real 2D marine seismic data. Combination of these two method was <br /> <br /> success to attenuate long and short period multiples. As for the evaluation, Tau-P Deconvolution became <br /> <br /> less effective when attenuating short period multiples from dipping reflector.