Thailand's government-controlled PTT PCL PTT.BK, which controls several businesses including gas pipelines, petroleum, gas exploration, petrochemicals and refineries, has posted 13.8% increment in Q2 earnings owing to a noteworthy performance coming from gas sales and refineries. The company's Q2 net profit increased to 29.9 bln baht compared to the 26.27 bln baht the previous year.