The Organization of Petroleum Exporting Countries (OPEC) headquarters located in Vienna, Austria. AFP Yonhap News The Organization of the Petroleum Exporting Countries (OPEC) and seven countries belonging to OPEC+, a group of major oil producing countries, have begun to increase their oil production targets for the fifth consecutive month. Reuters reported on the 5th (local time) that OPEC+ member countries held a video conference today and decided to increase oil production in August by 188,000 barrels per day compared to July.