In North America alone, 30,000 square kilometers for all oil and gas[0].
For a rough approximation, the US produced 14% of oil in the world in 2021[1] and this guy on Quora[2] says that 12% of the world's oil and gas goes into aviation fuel.
[0] https://www.science.org/content/article/thirty-thousand-squa...
[1] https://en.wikipedia.org/wiki/List_of_countries_by_oil_produ...
[2] https://www.quora.com/What-percentage-of-the-world-s-crude-o...