Trace-imposed stretch correction in Kirchhoff prestack-time migration

Qiancheng Liu, Jianfeng Zhang

Research output: Contribution to journalArticlepeer-review

Abstract

Kirchhoff prestack time migration (PSTM), which works trace-by-trace, remains appealing to academia and industry due to its robustness and efficiency. However, like the other prestack migration methods, Kirchhoff PSTM also suffers from the angle-dependent stretching effect, which narrows the amplitude spectra of seismic data. This effect gets more severe as the incident angle increases. In this paper, we propose a novel approach, which attaches a prediction shaping filter to the Kirchhoff PSTM, to mitigate the stretching effect. Our approach takes advantage on the trace-by-trace implementation of the PSTM algorithm, without the output of the angle-domain common-imaging gather (ADCIG). Also, our method can cascade with Q-compensation in PSTM. We examine our method with numerical examples and one field data.
Original languageEnglish (US)
Pages (from-to)1643-1652
Number of pages10
JournalGeophysical Prospecting
Volume66
Issue number9
DOIs
StatePublished - Sep 12 2018

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