Editor's comment: Although ENI have perhaps decided that the large deposits of oil sands located in Congo (Brazzaville) are viable as commerical developments these are unlikely to be new discoveries. There are numerous undeveloped oil sand outcrops known throughout the world which remain undeveloped due to the lack of a technological and financial solution. With much higher energy prices many of these are now being examined, albeit dogged by supply chain problems as costs escalate.