Macro forces leave them a certain percentage wiggle room in production to affect price but US oil and the world wide reduction in demand rule even over OPEC at its strongest and OPEC is practically dead really.
While US producers price their projects in the $25-35 cost per boe produced and the Fed keeps rates low the US can keep on trucking and Saudi can do very little about it. There are billions of barrels of oil sitting offshore in ships waiting for better prices.
There are hundreds of fracked fields that can be turned on and off like a faucet.
Sure offshore deep water is slow due to cost and cannot respond to swings readily but the fundamentals changed years ago.