According to Mumbai-based offshore sources, ONGC is working to identify potential oil and gas finds in its east and west-coast offshore blocks. It plans an international expression of interest (EOI) for pre-qualification involving a three-dimensional (3D) seismic study in 2016 and 2017, say sources.

The proposed contract is expected to be worth around $350m and is likely to be awarded by the end of the year, say sources.