I already tried to solve the problem myself and ended up building a new mod: https://mods.factorio.com/mod/endless_resources
My mod basically just checks every 5 minutes (iirc) if there are ore patches on the map that have less than 1000 ores in it and then just adds 5-100k (iirc). But this isn't the best solution because of three points:
1. Every 5 minutes, your UPS will go down depending on map size and your system specs.
2. If you have really high mining speed, you can mine more than 1000 pieces of ore in 5 minutes, resulting in the depletion of some fields nevertheless.
3. You are only using the graphic for a big chunk of ore because the number will always be higher than 10k in the normal playthrough.
Oh and fluids are a thing for themselves, not sure if they are compatible to other mods than Bobs.
So if you want to have a look at it, feel free to give me advice or update your own mod without my problems. :)
