HOUSTON, March 25 (Reuters) - Royal Dutch Shell Plccut back production at its joint-venture 275,000 barrel per day(bpd) Deer Park, Texas, refinery due to a shortage of crudesupply because of the closure of the upper Houston Ship Channel,sources familiar with plant operations said on Monday.
A Shell spokesman did not have information immediatelyavailable about Deer Park refinery operations on Monday.(Reporting by Erwin Seba)