BANGKOK, Nov 30, 2012 (AFP) - The 22-year-old compiled a two-day total of 13-under-par 131 to take a two-shot advantage over the chasing pack heading into the weekend rounds.
Singapore's Mardan Mamat carded a 70 to take a share of second place alongside England's Chris Rodgers and defending champion Udorn Duangdecha of Thailand at the Singha Park Khon Kaen Golf Club in northeast Thailand.
Taiwan's Chiang Chen-chih made one of the biggest moves with an impressive 64 to take a share of fifth place with compatriot Lin Wen-tang, Australian Wade Ormsby, the Philippines' Elmer Salvador as well as Thais Boonchu Ruangkit and Prom Meesawat at the King's Cup, which is the third last event on the 2012 Asian Tour schedule.
Supakorn was delighted with his lead but admitted feeling the pressure ahead of the weekend rounds.
"This is only my second start on the Asian Tour and honestly I'm feeling nervous as I've never been in this position before," said Supakorn, who turned professional this year.
After enjoying one of his best starts on the Asian Tour with an opening 63, Mardan continued his charge towards his fourth Tour title even though he could not match his first round heroics.
The cut was set at three-under with a total of 70 players making it into the weekend rounds.
The King's Cup is making its return after a year's absence following the floods in Thailand last year.
Leading scores after the second round (par 72)
131 - Supakorn Utaipat (THA) 64-67
133 - Chris Rodgers (ENG) 64-69, Mardan Mamat (SIN) 63-70, Udorn Duangdecha (THA) 65-68
134 - Chiang Chen-chih (TPE) 70-64, Elmer Salvador (PHI) 68-66, Prom Meesawat (THA) 65-69, Boonchu Ruangkit (THA) 67-67, Lin Wen-tang (TPE) 66-68, Wade Ormsby (AUS) 71-63