Pettersen, coming off a playoff loss to M.J. Hur last week in the Safeway Classic in Oregon, shot a 68 on Friday to match Kim at 9 under at Priddis Greens.
The 21-year-old Kim, winless in three seasons on the LPGA Tour, birdied the first six holes and finished with 10 birdies and a bogey to break Rawson’s day-old course record by two shots.
The tournament mark also was 64.
“I didn’t know I had six birdies in a row, so it was awesome,” said Kim, who shot a scorching 28 on the front nine. “I mean it was fantastic.”
“There’s definitely another course record out on this course, so I’m glad there’s another two rounds,” Pettersen said.
Pettersen won all five of her LPGA Tour titles in 2007 and is winless in her last 40 tournament. She has finished second three times this year.
“I play every week to win,” Pettersen said. “I mean, in this game you lose more than you win. So all I can do is give myself a chance on Sunday.”
Ochoa is winless since the Corona Championship in Mexico in April.
“It’s been a fun two days,” she said. “What I always try to do is to be in a good position for the weekend. And I’m right there.”
All 12 Canadians in the field missed the cut.
Alena Sharp had a birdie putt lip out on the final green to miss by a stroke.
“I hit too many good shots to miss the cut this week, but that’s the extra little pressure,” said Sharp, who shot 72-72. “You try hard not think about it, but it’s always there. Whenever you come to the golf course, when you tee it off the first hole, when you come up the 18th hole, it’s there for sure.”