Total revenue came in at 74.05 trillion dong ($3.19 billion), up 14.8 percent from the year-ago period, it said in a statement.

PetroVietnam Gas produced 9.6 billion cubic metres of natural gas, 1.6 million tonnes of liquefied petroleum gas and 95,000 tonnes of condensate in 2018, it added.

The company said 2019 would be a challenging year for its operations due to the shrinking gas reserves and rising operational costs.

(Reporting by Khanh Vu, Editing by Sherry Jacob-Phillips)