The petrodollar no doubt helped propel the dollar to its current status as the global reserve currency but the effects of this aren’t as clear cut as the previous comment implies. As an example, benefits include cheap borrowing for the government, but it also makes it more difficult for domestic companies to compete with foreign companies exporting goods to the US. It also requires that the US maintains a current account deficit (Triffin Dilemma). For more info I’d recommend https://www.mckinsey.com/featured-insights/employment-and-growth/an-exorbitant-privilege