Top Chinese offshore oil and gas producer CNOOC Ltd said on Wednesday it plans to produce up to 2 percent more of the fuels in 2013 as it earmarks $12 billion-$14 billion as capital expenditure for exploration, development and production.

The state-run company aims to produce 338 million-348 million barrels of oil equivalent (boe) this year, compared with estimated output of 341-343 million boe in 2012, it said in a statement. The 2012 output estimates were roughly in line with the company's target of 335-345 million boe.

CNOOC's output has been hurt by the suspension of its Penglai 19-3 oilfield in eastern China's Bohai bay since September 2011, when it was hit by an oil spill. CNOOC is still seeking regulatory approvals to restart production.

U.S.oil firm ConocoPhillips owns a 49 percent stake in the 168,000 barrel-per-day oilfield and acts as operator, while CNOOC Ltd has a 51 percent stake.

Shares of CNOOC, which is acquiring Canadian energy company Nexen Inc for $15.1 billion in China's largest ever overseas takeover, ended up 1.9 percent on Wednesday ahead of the announcement.

 (Reuters, edited by Topco)