OPEC’s most powerful internal alliance, bringing together the oil producer group’s Gulf members, is disintegrating fast. As a six-month-old spat between Saudi Arabia and Qatar deepens, the organization’s Gulf ministers will have to scrap their tradition of meeting behind closed doors to agree policy before OPEC holds its twice-yearly talks, OPEC sources said. Sponsored “We used to have a WhatsApp group for all ministers and delegates from the Gulf. It used to be a very busy chat room. Now it’s dead,” said a senior source in the Organization of the Petroleum Exporting Countries. Four other sources said there had been no official contact on oil policy between the Gulf Arab nations, in a grouping known as the Gulf Cooperation Council (GCC). […]