Dec 2 (Reuters) - Dyal Capital Partners is in talks to merge with Owl Rock Capital Corp in a deal with a blank-check company that would value the asset managers at about $13 billion combined, the Wall Street Journal reported here on Wednesday. Dyal and Owl Rock did not immediately respond to requests for comment. Reporting by Uday Sampath in Bengaluru; Editing by Devika Syamnath Our Standards: The Thomson Reuters Trust Principles.