The Day the Oilfield Changed is a series reviewing technical breakthroughs or commercial developments which fundamentally altered the nature of the upstream petroleum industry. In this episode we discuss how a 1970 agreement between Occidental Petroleum, led by Dr. Armand Hammer, and the government of Libya, led by Muammar Gaddafi, set OPEC on course to become a force in the world oil market. Additionally: If OPEC emerged in response to a certain set of conditions in the oil market what factors might lead to OPEC’s demise? Episode produced by Charlie Spears.