Mod inspired by request (https://forums.factorio.com/viewtopic.php?f=33&t=72721).
Forum page: https://forums.factorio.com/viewtopic.php?f=190&t=73212&p=441901#p441901

Adds two new recipes used in chemical plants with associated tech unlocks for use in converting unused wood into oil products. This mod uses all vanilla items and fluids, adding nothing new that requires additional logistic chains to deal with. Both techs for unlocks require only red & green science packs.

First tech and recipe, Advanced Wood gasification, is available after researching Oil Processing and unlocks its associated recipe. Put 6 wood into a chemical lab and it'll produce 35 petroleum gas.

The second tech and recipe, Advanced Wood to Oil Processing, is available after researching the previous tech and Sulfuric Acid and unlocks its associated recipe. With 6 wood and 10 sulfuric acid, it will produce 15 crude oil (with a little sulfuric acid left over that you need to route back around).

This means that you can take wood into the Advanced Wood Gasification, produce petroleum gas for sulfuric acid development, and then feed this into the Advanced Wood to oil Processing with more wood to get crude oil out. (Please note, the wood to oil process is not meant to be self sufficient. You'll still need to use the wood gasification or oil pumped from wells and processed into petroleum gas to get enough sulfuric acid.)

Both processes are real and are "scaled" to game values (minus an ingredient for the second recipe as it's not readily available already in game), but let me know if you see anything balance breaking.