How many GPM does that 1 1/2 HP pump produce and how many GPM will your spinklers use? I doubt you could move too many GPM with a 100 foot long suction unless you make it big enough. Maybe Cary will be along with his calculator once you provide some numbers.
Could you not put the pump into a pit close to the wells? Pumps always push better than they pull. See this thread where the guy tried using 300 feet of 1 1/4" pipe on a 1/2 HP jet pump.