(EnergyAsia, September 17, Thursday) — With A$300 billion in confirmed 20-year sales to China, India and Japan, Chevron Corp, Exxon Mobil and Royal Dutch Shell have announced their decisions to jointly invest A$43 billion to develop the first phase of Australia’s giant offshore Gorgon gas field. (US$1=A$1.2). Chevron Australia Pty Ltd, a unit of the…