The wave-equation wavefront migration (WWM) is an efficient form of wave equation migration by applying a finite-difference stencil around the leading portion of the wavefront. WWM has the accuracy of wave-equation migration, fewer aliasing and migration artifacts, and can sometimes be faster than the standard reverse-time migration. In this report, we test WWM on the 2-D SEG/EAGE salt model and compare the results with the standard reverse-time migration (RTM). For WWM, we follow the procedure for RTM but apply a finite-difference stencil around an expanding rectanglar area that includes the wavefront (WWM reverse-time migration). Results show that WWM reverse-time migration can be 20% faster than RTM without reducing the image quality. Using the information about the angle of incidence as in wavepath migration, WWM can backproject the reflection energy to the actual reflector. A simple point scatterer model is tested and the result is encouraging.
ASJC Scopus subject areas
- Geotechnical Engineering and Engineering Geology