Indefinite articles are A-ok.
KYS, GK.
And yet, here you are.
So let them drill, ShitForPants.
https://www.usgs.gov/news/national-news-release/usgs-announces-largest-continuous-oil-assessment-texas-and-new-mexico
Estimates Include 46.3 Billion Barrels of Oil, 281 Trillion Cubic feet of Natural Gas, and 20 Billion Barrels of Natural Gas Liquids in Texas and New Mexico’s Wolfcamp Shale and Bone Spring Formation.