Today's headlines on the Daily Brief include:

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• There’s been a shakeup in the top ranks of Tullow Oil following continued poor results in Africa;
  
• Rosneft is elbowing PDVSA aside on Venezuelan service contracts;
  
• Canada’s Canacol Energy has won three new gas exploration blocks in Colombia;
  
• Developing nations are demanding payouts for climate change at a UN conference;
  
• Could Bitcoin be part of the solution to end gas flaring?