That’s a tough question to answer because the economics of every project are different. Some some US shale oil projects are already deeply unprofitable with oil falling 10% to $66.15 on Friday.

Bloomberg has a breakdown that shows projects in the Southern Plains and Gulf States are deeply at risk.

Citi also highlights a variety of other projects, many of which led by the biggest names in the oil industry, and the breaking point on many of them is just below $60.

Shale oil breakeven prices

Shale oil breakeven prices

But if those are Exxon’s breakeven prices, they will be much higher for the smaller producers.