Abid Ali played the first two ODIs and scored 21, 22 respectively while Imam-ul-Haq featured in all three ODIs and accumulated 111 runs.
PCB Whites' Imam was hit on his left hand while batting against PCB Greens' Naseem Shah on day one of the warm-up match.
Porterfield was in no doubt Ireland's elevation to Test cricket after a thrilling debut ended in a five-wicket loss to Pakistan.
Pakistan captain Sarfraz Ahmed praised the character of young batsmen Imam-ul-Haq and Babar Azam after they ensured his decision to enforce the follow-on.
Pakistan now have a two-day warm-up match against Leicestershire this weekend before facing England in the first of a two-Test series at Lord's starting on May 24.