Energy giant Royal Dutch Shell said on Thursday it was reviewing its business interests in New Zealand as the company seeks to streamline its global portfolio amid a slump in energy prices. The Anglo Dutch firm is focusing on large growth opportunities, with deep water and integrated gas as priorities, after announcing plans to raise $50 billion from asset sales between 2014 and 2018 while cutting jobs and costs. "The Shell business in New Zealand is a great, but a small part of the global Shell business and hence the decision to undertake a strategic review at this time," Rob Jager, country chairman of Shell New Zealand, said in a statement.