China's top offshore oil and gas producer, CNOOC Ltd , produced 4.5 percent more oil and gas in the first half of this year.
CNOOC said in a statement on Wednesday that its crude oil output was 68.1 million barrels in January-June, while natural gas output was 99.7 billion cubic feet.
Its average oil selling price was US$58.8 per barrel in the period, down 5.8 percent from a year earlier.