Prestack depth migration using variable large-step

DOI

10.2991/icismme-15.2015.105How to use a DOI?

Keywords

variable large-step; prestack depth migration; FFD; synthesized areal shot-record migration.

Abstract

A variable large-step prestack depth extrapolation migration method is presented. In the extrapolation process adopting a large depth step can keep efficiency but at a cost of low accuracy. However, if the depth step is allowed to vary we can use a relative small depth step for accuracy where required and large depth step where possible to retain efficiency. The intermediate depth samples are obtained by applying phase-shift operator and interpolations. The Fourier finite-difference (FFD) operator is employed as the depth extrapolation operator. The variable large step method is also suitable to other extrapolation operators such as the split-step Fourier (SSF) operator and the phase-shift plus interpolation (PSPI) operator. To make this approach more efficient and economical, the method is applied to the synthesized areal shot-record migration. Two numerical examples have been used to assess the feasibility of this approach.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Qiqiang Yang
PY  - 2015/07
DA  - 2015/07
TI  - Prestack depth migration using variable large-step
BT  - Proceedings of the First International Conference on Information Sciences, Machinery, Materials and Energy
PB  - Atlantis Press
SP  - 518
EP  - 522
SN  - 1951-6851
UR  - https://doi.org/10.2991/icismme-15.2015.105
DO  - 10.2991/icismme-15.2015.105
ID  - Yang2015/07
ER  -