https://www.investopedia.com/articles/investing/072215/can-fracking-survive-60-barrel.asp
Fracking is expensive, but still less costly than the methods used to obtain oil from the wells mentioned above. According to Reuters, estimates put the break-even point for fracking at around $50 per barrel, but other estimates put it as low as $30 per barrel. This $30 per barrel figure is much lower than the total cost per barrel more widely published, but there is an important distinction between the estimates that put fracking costs at the $50 per barrel range.
At less than a price point around $50 per barrel, oil and gas companies are less likely to explore and drill for new oil accessible through fracking, but existing operations may still be cash-flow positive. Once the expensive exploration and initial drilling are complete, existing wells can continue to operate and stay cash-flow positive even as prices fall below $50 per barrel.