HOUSTON, April 1 (Reuters) - Royal Dutch Shell Plcincreased production in some units at its 275,000 barrel per day(bpd) Deer Park, Texas, refinery on Monday after bottleneckedtankers made their way through restrictions on the Houston ShipChannel, Gulf Coast market sources said on Monday.
Lyondell Basell Industries kept production at its263,776 bpd Houston refinery reduced on Monday because of theshipping constraints, the sources said.(Reporting by Erwin Seba)