The company posted a net profit of $680 million for the three-month period ended 31 March 2013, compared to $589 million for the same quarter last year.
Total revenue also increased by 17% on last year to $1.92 billion.
PTTEP attributed these increases to a higher average sales volume, which was 15% up on last year at 291,476 barrels per day of oil equivalent.
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