Heffernan joined the League One club on an initial one-month deal, Trollope could look to offer him an extended deal.
"We are assessing it as it goes along. Paul's looking at us, we're looking at him and I'm sure the agent is looking at a lot of things.
"He's fitted into the group well and so far, so good.
"We're hoping that we can make an impression on him and he's certainly made an impression within the group already and shown his quality. We're pleased how it's going so far, in terms of the future we'll wait and see.