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Nonlinear Optimal Stacking Based on Shortest Path Ray Tracing for Enhancing Pre-Stack Seismic Data
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 81st EAGE Conference and Exhibition 2019, Jun 2019, Volume 2019, p.1 - 5
Abstract
Summary
Nonlinear phase and amplitude disturbance in complex areas such as foothill environment, desert environment, seriously smear the pre-stacking seismic data. The incoherent noise, extreme near-surface scattering and low signal to noise ratio intensively demand an effective pre-processing method to improve the quality of pre-stack seismic data. In this abstract, we proposed a novel method to construct the nonlinear optimal stacking. The method consists of two steps: one is regional division and the others is constructive superposition. The selected local stacking region is governed by the beam ray theory varying with the acquisition coordinates, which can be conveniently implemented in CS, CR or CMP domains. Then, the constructive superposition implementation contain two parts: linear phase change which is estimated by multiple cross-correlation with lateral constraints and nonlinear disturbance which is estimated by solving a variational problem. The variational problem is solved by the shortest path ray tracing algorithm. Finally, we present results on 2D real data to illustrate our approach is valid.
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