OREANDA-NEWS. August 01, 2011. PetroChina, China’s biggest oil producer, will further delay the startup of a planned maintenance of its 200,000 barrel-per-day (bpd) Dushanzi refinery by two to three weeks to late Aug.

PetroChina had initially planned to shut down the largest refinery in northwestern Xinjiang in Jun or Jul, but it postponed the 50-day overhaul to begin in early Aug, as its 210,000-bpd Lanzhou refinery in neighbouring Gansu province started a partial turnaround from Jun 20, an industry source said.

Dushanzi, processing mainly Kazakhstan crude oil, was fully commissioned in Sept 2009 after replacing several old crude oil units with a new 200,000-bpd unit and adding a 1-million-tonne-per-year ethylene cracking unit.