Try it and see. It might work OK with the clock at the standard 100kHz, I have not tried that. I note that you only want to go 15m, I am pretty sure that with cat 5 or similar cable and low value pull up resistors you will get it working.
Electronics is a hobby that makes experimenting easy, so experiment and see what you get. Start with the standard 4k7 resistors, it might work, although I suspect it won't. Reduce the value to 2k and see what happens. Based on my experience I would expect 1k to work, but 2k might well be OK.
Don't be afraid to try things!
Do let us know how you get on.
Enjoy.