(Adds chemical plant as the incident/unit location)
Nov 7 (Reuters) - Royal Dutch Shell Plc :
* Shell says "at approximately 1 pm on November 7, 2014, theShell Deer Park manufacturing site experienced a release ofhydrocarbon material at its chemical plant
* Shell says the affected unit was shut down
The facility houses a refinery and a chemical plant
Shell reported a vapor release incident in progress at DeerPark facility
(Deer Park refinery is a 50-50 joint venture of Shell andMexico's national oil company, Pemex PEMX.UL)Refinery capacity: 327,000 barrels-per-day (Reporting by Anupam Chatterjee in Bangalore)