(EnergyAsia, May 18) — The massive Shell-CNOOC petrochemicals joint venture (jv) project in Huizhou, Guandong province is operating smoothly after coming onstream last month.             The partners invested some US$4.2 billion in the project, making it the largest joint venture project in China so far. Shell owns 50% while CNOOC has 45% and the Guangdong…