(EnergyAsia, April 1 2013, Monday) — Singapore state investment firm Temasek Holdings said it recently paid 1.036 billion euros to raise its stake in Spain’s largest oil and gas company Repsol from 1.25% to 6.3%. (US$1=0.78 euro). Temasek paid 16.01 euro a share for the 64.7 million Repsol treasury shares. The Spanish firm now accounts…