The supply grows alongside with the price people are willing to pay for it. As you yourself pointed out.

Nowadays the demand falls, the prices fall, this would be followed by a fall in production. But whatever happens oil will be available at an affordable price because world just doesn't work without it. If oil gets too pricey, reserarch into digging up more oil more cheaply will be funded. As it happened with shale. And it will end up in one more oil price crisis same as the one we're witnessing. And the one after it.