Yes you can install a sprinkler system which will be supplied by well water. You must know two things about the well pump:
1. You must know how much water the pump supplies (gpm)
2. You must know thee water pressure at the outlet of the pump
Here is an excellent link to information about pumps:
http://www.jessstryker.com/pump.htm
Once you know these two things you design the sprinkler system so that you do not exceed these limitations on any zone in the sprinkler system.
Please read the following information about designing a sprinkler system:
http://www.sprinklerwarehouse.com/LawnCare/NewSprinklers.asp
<img src=icon_smile.gif border=0 align=middle>
