Algerian defender Halliche, 25, has struggled since making the move from Benfica in 2010 and has made just one league appearance for the Cottagers.
"With Halliche, he is probably our fifth centre-back so he is in a difficult position. I feel for him because he played for the reserves when we beat Arsenal and played a terrific match. He is a good player but I can't play five centre-backs," Jol told Sky Sports News.
Jol also questioned the future of Riise, who recently returned to the club following a loan spell at Portsmouth.
"The boy needs to play but I have to find a good club for him that play in a certain style. They have to guarantee or promise me that he will be a good part of the squad otherwise he will stay here."
Riise, 28, has yet to appear for Fulham this season.