CNPC natural gas output increases

China National Petroleum Corp, the country's largest oil and gas producer by annual output, produced 103.3 billion cubic meters of natural gas in 2017, a year-on-year increase of 5.3 percent.

Accounting for 70.1 percent of total domestic output, the production level met 44 percent of domestic consumption demand in the country, while also helping to optimize the country's energy mix, said the company, which is better known as PetroChina.

Natural gas production accounts for 46.4 percent of the company's oil-and-gas portfolio, a new growth engine for benefits and revenue, it said.