HR: 0830h
AN: S41B-06    [Abstracts]
TI: Double Tau-P Transformed Surfaces and Deterministic-Stochastic Muting for Partial Annihilation of Multiple Reflection
AU: * Sarwar, A K
EM: asarwar@uno.edu
AF: University of New Orleans, Department of Geology and Geophysics, 2000 Lakeshore Drive, New Orleans, LA 70148 United States
AB: This paper presents a new synergic combination of double Tau-P transformation and Deterministic-Stochastic muting for the removal of multiple reflections from the seismic data. The seismic data contains both primary and multiple reflections. The multiple reflections, appearing as coherent events, render the seismic sections uninterpretable by introducing spurious boundaries. This paper attempts to improve the reflection data quality by partial annihilation of multiple reflections. There are several approaches, e.g., Common Midpoint Stacking, Slant Stacking (often 1-D Tau-P transformation), Predictive Deconvolution, and their individual variations used by many authors. Each of these methods has both merits and demerits. Recently inversion based methods were introduced for solving the formidable multiple problems arising due to sub-salt, overhang, and other complex geometries. The present paper takes a different attempt to attenuate multiples from irregular and dipping surfaces. The reflection seismic data are considered as a function of midpoint and offset coordinates and intercept time. A two dimensional Tau-P transformation of the space coordinates reduces the function domain primary and multiple surfaces into special curves. Deterministic-Stochastic muting is applied on the transformed slices. An inverse transform reproduces the seismic data significantly removing multiples. A computer algorithm based on theoretical development is successfully applied on synthetic seismic data.
DE: 7200 SEISMOLOGY
DE: 7260 Theory and modeling
DE: 7299 General or miscellaneous
SC: Seismology [S]
MN: 2005 Joint Assembly