They dont have the power they once had Tony, but what they do have is still considerable. I think there' s less cohesion than there once was, but the Saudis are still the 800 lb gorilla. Their costs of production are still the best in the world. They need a good price as much as we do, and were it not for their economy being tied to oil as much as it is they wouldn't stand losing market share as they are. So many factors involved , political being as much as economical. IIRC, last month we only imported 1.2 million a day from the Saudis and its headed to 800,000 this month..
Exxon has made some MAJOR discoveries offshore Guyana , ten of them at last count in the billion barrel range. Guyana is fixing to be a major exporter in 3 to 5 years, further eroding OPEC's market share.
And there is still a lot of excess capacity in the middle east. Iran, Iraq, Libya are all under producing. Supply is not going to be a problem in the foreseeable future....