Yeah it looks like they all get set to 10/s. The idea is though is that they won't deplete over time, and as you go farther away from the starting area you'll find patches with more and more oil spots, so each patch in total will still have more throughput. The intent of this mod is to make all resources have a constant output, and "richness" is no longer relevant, you just get bigger patches the farther away you look.