(EnergyAsia, April 29) — Singapore’s Keppel Corp said the strong performance from its oil-rig and property businesses helped raise its first quarter net profit by 10.7% to S$145 million from year-ago levels. (US$1=S$1.65). Revenue was up 27.8% to S$1.15 billion.             Subsidiary Keppel Offshore and Marine, which oversees the oil-rig business, secured a record level…