* CNOOC beats forecasts with 61 bln yuan profit in 2019
* All-in production costs drop to $29.78 a barrel
* CNOOC to impose more stringent cost controls in 2020
BEIJING/SINGAPORE, March 25 (Reuters) - China's national offshore energy producer CNOOC Ltd reported a 15.9% rise in 2019 profit on Wednesday, its best performance in five years thanks to higher oil and gas output and persistent cost control.
CNOOC, one of the industry's lowest-cost explorers and producers, had planned to lift capital spending this year to its highest level since 2014 but the plan might be clouded by the coronavirus outbreak and plunging oil prices.
"As the coronavirus outbreak increases uncertainties in global economy and oil prices fall sharply ... the company will implement more stringent cost controls and more prudent investment decisions," said the company statement.
Oil prices fell to about $25 this week, putting pressure on producers around the world, although CNOOC cut its all-in production cost by 2% in 2019 to $29.78 per barrel.
The listed division of state-backed China National Offshore Oil Corp reported a net profit of 61.05 billion yuan ($8.6 billion) last year and revenue of 233.2 billion yuan, which was 2.4% higher than in 2018.
CNOOC's profit was higher than analyst forecasts of 59.1 billion yuan, according to IBES data from Refinitiv.
The company's realized oil prices climbed 5.8% to $63.34 per barrel while gas prices rose 2.2% to $6.27 per thousand cubic feet. Output increased 6.6% last year to 506.5 million barrels of oil equivalent.
Capital expenditure was 79.6 billion yuan in 2019.
CNOOC's reserve life, a measure of how long its current oil and gas reserve base can last, remained above 10 years in 2019, with a reserve replacement ratio of 144%, CNOOC said in a statement filed to the Hong Kong Stock Exchange.
The Stabroek oil block in Guyana operated by Exxon Mobil Corp, Hess Corp and CNOOC, started production ahead of schedule in December and Exxon raised its Guyana oil estimates by 2 billion barrels.
CNOOC also said it made a large discovery in the Kenli 6-1 oilfield in Bohai Bay and has started production at the Bozhong 34-9 oilfield, south of the Bohai Sea.
The company plans to pay a final dividend of HK $0.45 per share. ($1 = 7.0976 Chinese yuan renminbi) (Reporting by Muyu Xu in Beijing and Chen Aizhu in Singapore; Editing by David Clarke)