This Blueprint is for a modular oil refining system. The book contains several blueprints, one for each product. The entire factory is included as well.
The full-factory blueprint contains all of the circuit logic to control the inputs and outputs to ensure that all of the resources are well-managed. Tweak them to suit your production needs!
For each resource, you should be able to expand simply by placing the blueprint to the right, with the beacons overlapping.