Opec Secretary-General Mohammed Barkindo is "very concerned" about dwindling spare capacity, and questions whether there will be enough investment inside Opec or outside Opec to build sufficient buffers against future supply shocks, he told Energy Intelligence in an interview. Opec's spare capacity has come under scrutiny as Venezuelan production continues to decline and a Nov. 4 deadline nears when tough US sanctions come into force on Iranian oil exports (IOD Oct.11'18).
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