Abstract

Multi azimuthal offset VSP surveys are popular choices for instantly generating cost effective seismic images around the borehole which are very effective in mapping the lateral extension of the pay sands. The processing of a fixed offset three component VSP data in a deviated well is a difficult task due to various reasons like, absence of gimble mounted well geophone, rotation of well geophones (tool spin), inconsistent coupling between formation geophone sensors, inadequate energy sources & survey geometries, low foldage besides lack of adequate processing software. Three component offset VSP surveys oriented along different directions, recorded P & S waves in a deviated well in Kuthalam field which were processed to generate sections /images around the well.