Understanding Bitumen vs Synthetic Crude Oil (SCO)ENB pipelines carry an assortment of liquids and gases. I found the following article helpful in explaining Alberta's situation (dilemna?) in regards to heavy/sour bitumen vs light sweet crude (SCO). I searched the article for my investment in SU as they are heavy into upgrading (turning bitument into SCO), but it helped me understand why it is also important to ENB both now and going forward.
https://www.oilsandsmagazine.com/technical/bitumen-upgrading
It will take a few minutes to read, but very worthwhile imo.