The Organization of Petroleum Exporting Countries (OPEC) is an international organization. The world's major oil-producing countries cooperate with western oil companies to ensure oil revenue. On September 65, 438+0960, representatives of Iraq, Iran, Kuwait, Saudi Arabia and Venezuela met in Baghdad to discuss the establishment of a coordination body. 14 September, the Organization of Petroleum Exporting Countries was formally established, and then its membership increased from 5 to 13. Algeria, United Arab Emirates, Qatar, Libya, Nigeria and Indonesia, Ecuador and Gabon withdrew from the organization in 1992 and 1996 respectively. The headquarters of the organization has been located in the Austrian capital since 1965, and the current secretary-general is former Nigerian oil minister Rilwanu lukman, who took office on 1995+0.