(EnergyAsia, August 2) — Singapore Petroleum Company (SPC), the only locally listed oil refiner and fuel retailer, said its first half net earnings rose by 157% to S$174.4 million on the back of high oil prices and surging sales. Revenue climbed 59.9% to S$3.25 billion from a year ago. (US$1=S$1.68).             Half-year earnings per share…