Texan energy firm ConocoPhillips and Ireland-based Tullow Oil have been awarded offshore blocks to explore for gas in the Bay of Bengal, it has been announced.  Two deep-water offshore gas blocks have been leased to Houston-based ConocoPhillips, and one shallow-water block to Tullow Oil.  The companies will be given a production-sharing contract as well as the rights to export the gas as liquefied natural gas, or LNG.  Exploration work in the disputed waters could start as early next year, with the companies predicted to spend around $160.5 million, using hydrocarbon