The US is capable of producing enough oil to be a net exporter. The US and the OPEC react to each other and all the other players and parts of the market. You can also always just read OPEC's own public assessment of their actions through their own Monthly Oil Market Report to get the fuller view [1].

This is cartel behavior over a limited resource that's in high demand. Oil and gas will die out when demand is reliably met through other sources.

[1]: https://momr.opec.org/pdf-download/