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How does the 2017 National Petroleum Reserve-Alaska assessment compare to other assessments USGS has done?

The 2017 National Petroleum Reserve-Alaska assessment estimated a mean of 8.7 billion barrels of oil and a mean of 25 trillion cubic feet of natural gas. The largest assessment of oil performed by the USGS to date is the 2016 USGS Assessment of the Wolfcamp Shale in Texas’ Midland Basin, which estimated a mean of 20 billion barrels of oil. The largest assessment of natural gas performed by the USGS to date is the 2016 Assessment of the Bossier and Haynesville Formations, which estimated a mean of 304 trillion cubic feet of natural gas.

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