Home Latest Australia's Santos agrees to buy Quadrant Energy for at least $2.15 billion Latest Australia's Santos agrees to buy Quadrant Energy for at least $2.15 billion By Genpie - August 22, 2018 56 0 Facebook Twitter Google+ Pinterest WhatsApp Australian oil and gas firm Santos Ltd said on Wednesday it has agreed to buy privately held Quadrant Energy for at least $2.15 billion, bagging access to what may be the biggest oil find off Western Australia in over two decades.