Seismic Imaging and Interpretive Model Building in the Colombian Andes

Lateral velocity variation and dipping anisotropy in<br>the overburden cause imaging and position problems on<br>seismic images in thrust belt environments like the<br>Andes. Anisotropic depth migration has the greatest<br>potential to provide the clearest seismic image and most<br>accurate lateral position of subsurface reflectors in<br>thrust-belt environments.