3D Seismic prestack viscoelastic migration method based on high-precision traveltime calculation in VTI medium

DOI

10.2991/iceeg-16.2016.61How to use a DOI?

Keywords

prestack migration, Q compensation, traveltime calculation,VTI medium

Abstract

In coal exploration, seismic strong reflections from overlying strata may shield the propagation of seismic waves into deep parts, resulting in poor imaging quality for deep targeted area. In fact, seismic wave energy will be lost and velocities will undergo dispersion after passing through viscoelastic medium. Therefore, a method is proposed for restoring the absorbed energy, namely Q compensation. The process of absorption compensation can be decomposed into two parts, with one from zero offset and the other from finite offset. In order to improve the accuracy of absorption compensation for finite offset, we include sixth order term in polynomial expansion to form a high precision traveltime calculation formula in VTI medium. Field data application shows that the proposed prestack viscoelastic migration method can eliminate shielding effect and improve vertical resolution, which has important values in resolving the hidden seams.

Copyright

© 2016, 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  - Qiannan Liu
AU  - Wenfeng Du
AU  - Jingtao Zhao
AU  - Xiaoting Li
PY  - 2016/06
DA  - 2016/06
TI  - 3D Seismic prestack viscoelastic migration method based on high-precision traveltime calculation in VTI medium
BT  - Proceedings of the 7th International Conference on Environment and Engineering Geophysics & Summit Forum of Chinese Academy of Engineering on Engineering Science and Technology
PB  - Atlantis Press
SP  - 223
EP  - 226
SN  - 2352-5401
UR  - https://doi.org/10.2991/iceeg-16.2016.61
DO  - 10.2991/iceeg-16.2016.61
ID  - Liu2016/06
ER  -