Some other mod disabled Oil processing on which your first tech depends leaving me with a not researchable technology.
I have no idea which mod did that since disabling this also disables all oil technologies.

However, the following command reenables the technology:
/c game.player.force.technologies['oil-processing'].enabled=true

Ah, thanks for the headsup.. I'm thinking about simplifying the research for an upcoming version update, so I might even take out the requirement since it's meant to replace oil processing in the beginning of a game anyway

Something like

if not data.raw.technology["oil-processing"].enabled or data.raw.technology["oil-processing"].hidden then
data.raw.technology["wood-gas-processing"].prerequisites = nil
table.insert( data.raw.technology["wood-gas-processing"].effects, { type = "unlock-recipe", recipe = "oil-refinery" } )
end

should do the trick to just remove the prerequisites and unlocking the right building to use the new recipes.
Not nice but functional ^^

Well, unless the mod disables this tech because there is no oil-refinery anymore but marking another mod as not compatible is a valid option.

Sounds great, feel free to submit a pull request.. I'm open for suggestions!

Could you make the changes and submit them in a pull request? Otherwise send them to me as an email and reply here that you did :)