Left side is the main town with apartments, shopping, a cinema, swimming pool, university, radio station, etc.
The middle part is irrelevant, they are the construction infrastructure and a vehicle building plant.
On the right is the refinery complex, with a couple oil pumps nearby, a train station to the north that brings in additional oil from another site and another station to the south that goes to the border to sell the fuel and bitumen.
That building with the red and white chimney is a heating plant that supplies the central heating to the town during winter colds.

Anyways, here's the breakdown.

- Look at the map for oil reserves. As of writing this, natural resources are infinite, don't know if they want to change this in the future.
- Build oil wells in the area. At this point you have to use foreign help.
- The wells are autonomous and only require electricity, no workers required).
- So you go to the border (preferably to the side you want to sell to) find a border-crossing with an electric station you can hook up to, build a high-voltage power line to the drill site, use a transformer to convert the high-voltage to low-voltage and route it into distribution buildings that can reach all the pumps (use multiples if necessary, using switches to branch off the electric network).
- Build some storage tanks to store the excess oil in case production is more than the consumption. Use merger pumps to link all the pumps together. One pipe outlet can only go to a single pipe inlet. And you'll have more pumps than inlets on the storage tanks so you have to merge pipelines.
- So far this is entirely worker-free, you can sell the crude-oil for a bit of quick buck, but it's way more profitable to sell refined fuel.
- Here come the workers. They require a place to live, bread and meat to eat, clothes to wear, electronic gadgets to to buy, healthcare, etc. They also need warmth during winter if you enabled seasons, and childcare if you enabled complex-school system (women cannot work if they have to look after toddlers, so a kindergarten is needed in that case).
- As far as I can tell they can go without religion and alcohol if everything else is ok (you can build a pub, but cannot build churches without mods anyway).
- They are a needy bunch.
- Now build an oil refinery in a place that is far enough away from the main town so it doesn't pollute the area, but close enough that people don't have to spend too long on the bus going to work.
- If all their needs are met, and the refinery is up, build a bus station in the town and make sure all the apartments can reach it. Build a vehicle depot and buy a couple buses, set one of them up to stop at the station and the refinery (you can go from a station straight to a workplace).
- Oh yeah, vehicles require fuel. Place down a fuel station so buses can refuel.
- Obviously hook the crude oil up to the refinery, and make sure the buses can reach as well. Also electricity.
- Now set up two storage tanks, one for fuel, one for bitumen.
- If the border is far away, trains may be the best option. If it's right next door, a couple trucks might do the trick.
- For trains you need a liquid-loading station, a depot, and depending on if you want electric or diesel trains, an electric supply for the tracks or a refuelling point.
- If everything is working as intended, you can use a truck to keep the different building that require fuel topped up (gas station, for example).
- All the rest can be loaded into tanker cars and sold at the border for big bucks.