I hope this works,but if my math is right it would take 15,000 acres to produce 15,000 bbl/day of diesel (say a conventional small oil field development)
We've got lots of marginal/desert land available. And this would take way less land than to generate the equivalent amount of ethanol from corn.
US Annual diesel consumption = 64,323,336,000 US Gallons
Divide by 15000 gal/acre
= 4,288,222 acres
divide by 665 acres/mile^2
=6,448 miles square
~a square, 80 miles to a side.
About 2X the size of WSMR.