IIRC...Oil producers in the U.S. could build feeder pipelines (which mean even more jobs) from their oilfields into the main Keystone line...then pay a small sum to have their oil transported in the Keystone pilepline to the refinery.
Think of it as access roads feeding traffic into a major 6 lane highway.
@Smokin Joe that's a pretty basic description right?
It is. Something to consider, though. In situations where the lifetime of the well is indeterminate, (you just don't know), the more complex pipeline arrangements are, the more money planted in the ground, the more permits, rights of way, etc.
To a great extent, that is already being done with well pads in ND, for the purpose of gathering the wellhead gas produced with the oil to take that to processing facilities.
If you look at those production pads on Google Earth, you will see from six to as many as forty, four hundred barrel upright tanks on the location for the temporary storage of oil and water produced, and for now, that is trucked to rail terminals, pipeline facilities, or disposal wells (for the salt water). For now, the short hops are being made by truck, for the most part.