ONGC has signed a memorandum of understanding with US-based ConocoPhillips to conduct a joint study of shale gas potential in all domestic basins, as well as some global ones that are owned by ConocoPhillips, ONGC chairman and managing director Sudhir Vasudeva told NDTV Profit. "ONGC will also get access to technology held by ConocoPhillips, which is a major player in shale gas as well as deep water exploration," added Vasudeva.