f High resolution imaging for subtle geological features in the Llanos basin

We demonstrate in a seismic processing project from the Llanos basin in Colombia that increasing bandwidth prior to migration can improve the spatial (lateral and vertical) resolution and the subsequent velocity analysis can produce a more detailed velocity profile which in turn improves image quality. The increase in bandwidth prior to migration reduces both vertical and lateral wavelet widths and, thus, increases spatial resolution. The improved spatial resolution in turn permits a more detailed velocity field to be defined both laterally and vertically. This approach, bandwidth expansion prior to migration, can be applied to both time and depth migration flows. We apply the high resolution imaging technique to the relatively thin Oligocene to Early Miocene Carbonera sandstones from the Llanos basin. Traps are typically three-way structural closures bounded by faults with relatively small throws. Using the highresolution imaging, the thin sands, their lateral pinchouts and the fault locations can be more accurately mapped reducing exploration risk.