Sept 23 (LNGJ) - US investment bank Morgan Stanley said in its latest overview of US shale-gas production, which will underpin LNG exports, that output will remain elevated. "We expect 2013 US production to average 66.4 billion cubic feet per day. For 2013, Marcellus production will continue to increase as the region's infrastructure de-bottlenecks. However, we expect production from dry gas plays (Barnett, Haynesville, etc.) to decline year-on-year."








