Our oil and gas reserves are privately owned, thus, they must make a profit.
Any “surplus” in our liquid petroleum comes from fracking.
Fracking is very expensive, mostly because the well must be continuously worked after drilling, and because the well is exhausted after about one year.
Most fracked wells in the USA cannot make a profit under $70 a barrel.
Same problem with natural gas and NG liquids.
We have a USA surplus when gas is $4.50 (unless we have a severe winter like 2014).
But owners will not drill new wells for under $5.50.
That means if we spent many years and many billions of dollars to build a natural gas export infrastructure, the price of natural gas in the USA would go up at least 25% when we started exporting to Europe.
Good luck selling that idea to American voters.
We can make hydrocarbon fuel with low cost heat from nuclear power plants.