Yes, without oil from other mods or crops, the first oil for plastic production needs an randomly found oil source. The seismic prospector is meant to be used for scanning a bunch of areas at once, printing the books automated. That way prospecting is not that much work anymore. And as the books contain also the scan coordinates, all informations are there combined into one.it is still a very boring work to hit a oil source, making the oil rig multi block for every try is very annoying, you could have created a more basic thing to prospect , like immersive did, i know we have the seismic , but i dont know how that will work out, and we need to make some stuff of oil before we can use that thing.
You usually change your powergen a few times while progressing.By the way, what is the best power generation until fusion reactor?
Starting with Coal and/or Solar boilers.
Many use methan or biogas after coal.
Then nitrofuel and other oil products once you reach the distillation tower.
About the same time is usually the change to large turbines with higher efficiency than single block generators.
Once EV tech is reached nuclear gets added. A thorium reactor should be build by everyone since you need materials from there later for fusiontech and it is slow.
A Uranium or Mox fluid reactor + large heat exchanger can easily reach 6-10k EU/t. That would be the last tier before using fusion.