Can stem cells be used for regeneration of oligodendrocytes to remyelinate axons that have been degenerated due to alcoholism?

There is no evidence: For this to be the case presently. Unfortunately there is limited data in regards to the use of stems cell for most applications. Beyond stem cell transplants for bone marrow related disorders there are some accepted stem cell therapies for bone, skin and corneal diseases. There really isn't much presently for neurologic disorders .. maybe in the future though.