Permian Basin is much larger than we thought

Last week the U.S. Geological Survey (USGS) announced the largest estimate of continuous oil that it has ever assessed, and the region is the Permian basin in the U.S., on an article appeared on Forbes.
The Permian Basin lies underneath western Texas and southeastern New Mexico. The geology of the Permian Basin is rich and complex, both horizontally and vertically. The Permian Basin has commercial accumulations of oil and gas in stacked layers, at depths ranging from 300m to more than 25,000 feet. The greater Permian is made up of several subsidiary basins, the largest of which are the Midland and the Delaware.
For this particular assessment, the 50% confidence level is that there are at least 20 billion barrels there. The study further estimates that there could be something reasonably between 11 billion barrels and 31 billion barrels.
According to the Energy Information Administration’s (EIA) most recent Permian Region Drilling Productivity Report, the Permian is presently producing 2 million barrels per day (bpd) of oil and 7.3 billion cubic feet per day (Bcf/d) of natural gas.
The problem, according to the same source, seems to be that, at current oil prices, it’s very hard to find a way to extract all that oil without losing money.