Springs occur naturally and are found where an aquifer and an aquiclude intersect the surface. Or where a confining layer is broken and water rises to the surface by itself. “Artesian Spring”
A well is a pipe inserted by people. Using a pump, water is drawn to the surface. In the case of an Artesian Well, the water rises into the pipe by itself from a confined aquifer.
I hope my answer has come to your help. God bless and have a nice day ahead!