PetroChina Company Limited [[PTR]] is up more than 3% in late-day trading – adding more than $6.5 billion in market capitalization to the company.

The energy sector as a whole is up 1.95% on the day, though PetroChina’s gains are greater than competitors like Exxon Mobil Corp. [[XOM]] and BP [[BP]] but slightly behind Petroleo Brasileiro [[PBR]].

The only news to report is that PetroChina’s parent company China National Petroleum Company announced over the weekend that PetroChina will increase crude oil capacity at its Jilin plant by a third to 200,000 barrels per day by late 2010.

Last week, PetroChina reported higher refining profits for the first-half of the year thanks to a relaxing of price controls on diesel and gas by the Chinese government.