Well I am not going to use your numbers because you are off a lot. A "Barrel" of oil is not your standard 55 gal drum. The number is 42 gal for an oil barrel.
A PBR as it is now will produce 50 gal of oil a day per acre. so that is 18,250 gal a year or 434 barrels per year per acre.
That would mean 10 mil barrels would require 23,042 acres If you combine the PBR and the lipid trigger adding 30% then you would only need 16000 acres ( thats only 320 acres per state in the US)
So I would guess that when we tell the oil companies that we can sell them enough PBRs that we can use 10% of their oil field and they can sell the other 90% of the land for a profit and save the property taxes. They might get interested. Also dont forget that algae can be processed in a regular oil refinery
The best part about these numbers is we would need less PBRs to make 10mil barrels then all the oil wells on that one oil field