Pros and Cons of a ground loop vs. open loop well injection?

[Geo NR Gee]

If you had a choice of a closed ground loop or a open system with a well and return injection system, what would the pro and cons be?

I see a closed loop as a cleaner system not as subject to contamination, while the open loop would be bringing up the minerals in the water thus shortinging the life of the heat exchangers.

A ground loop system would require a larger area (which I am limited) to be dug up to support the loop field.

I am sure there is a minimum amount of gph needed to support a open loop system?

I was looking at the DIY well drilling and the author used this open loop system by digging a well and then three more injection wells. His diagram is attached.