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Regularized Q-RTM Using Time-Variant Filtering in the K-Space
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 79th EAGE Conference and Exhibition 2017, Jun 2017, Volume 2017, p.1 - 5
Abstract
Summary
Reverse time migration (RTM) in attenuating media needs to consider amplitude compensation and phase correction. However, such an artificial compensation is a nonstationary process with energy exponentially amplified over travel time, which indeed boosts high-frequency noise and generates undesirable artifacts. In this paper, a robust Q-compensated RTM (Q-RTM) scheme, regularized by time-variant filtering (TVF) in the k-space, is therefore proposed. Compared with conventional Q-RTM regularized by time-invariant filtering (TIF), our proposed method generates higher-resolution and higher-fidelity images. The synthetic examples further demonstrate the stability and feasibility of the proposed approach.
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