In Keenan’s absence, Ciaran Frawley filled in at full-back and marked his first Six Nations start with a try.
“It’s a process which is slowly ticking along nicely,” added Catt on Keenan’s return to fitness.
“Hopefully by Tuesday or Wednesday he’ll be training fully and give us that opportunity.
“We need that competition in the team for us to drive forward.”
Ireland are chasing back-to-back Grand Slams – which would be unprecedented in the Six Nations era – after beating France, Italy and Wales.
However, Catt says Ireland must step up their performance at Twickenham after admitting that certain aspects of the Wales game were “disappointing”.
“We’ve had a review of the Wales game and it wasn’t perfect by any means. I think we’ve really realised what we need to do now over the next 10 days to prepare properly for England.
“We went away from what we were really good at against Wales, and it’s something that we’ve addressed and need to make sure we get right, hence the session today was pretty sharp. It’s a good start, the boys will relax this weekend, but come Sunday and Monday they’ll be fired up again.
“We just went through the motions a little bit [against Wales] rather than implementing the way we wanted to play, and it was a bit disappointing in certain aspects of the game.
“But we addressed it and it’s something we have to get right for England, so we will.”