Adds realistic petrochemical processing into Factorio. Process bitumen hydrocarbons into hundreds of products and drill deep for underground oil deposits.
Having the same problem, as well as when i do place an oil derrick on them they can consume drilling fluid, but output nothing, same thing with the tar extractor.
@Ghihom both the Tar Extractor and the Oil Derrick has a drilling phase before being able to output oil or tar.
So you just need to maintain the drilling fluid input until the building stops consuming it and starts outputting what you drilled for.
What I'm reporting is that it doesn't display correctly on map overview.