Analytical path-summation imaging of seismic diffractions |

**Dmitrii Merzlikin and Sergey Fomel**

Bureau of Economic Geology

John A. and Katherine G. Jackson School of Geosciences

The University of Texas at Austin

University Station, Box X

Austin, TX 78713-8924

dmitrii.merzlikin@utexas.edu

Diffraction imaging aims to emphasize small subsurface objects, such as faults, fracture swarms, channels, etc.
Similarly to classical reflection imaging,
velocity analysis is crucially important for accurate diffraction imaging. Path-summation migration
provides an imaging method, which produces an
image of the subsurface without picking a velocity model.
Previous methods of path-summation imaging involve a discrete summation of the
images corresponding to all possible migration velocity distributions within a predefined
integration range and thus involve a significant computational cost.
We propose a direct analytical formula for path-summation imaging based on the continuous
integration of the images along the velocity dimension, which reduces the cost
to that of only two fast Fourier transforms.
The analytic approach also enables automatic
migration velocity extraction from diffractions using double path-summation migration framework.
Synthetic and field data examples confirm the efficiency
of the proposed techniques.

- Introduction
- Method

- Field data examples

- 3D field data example
- Discussion
- Conclusions
- Acknowledgements

- Appendix B: Double path-summation migration
- Bibliography
- About this document ...

Analytical path-summation imaging of seismic diffractions |

2017-04-20