Depending on the length of time the weight of the bike sits on that 4 inch patch of rubber, could create a temporary flat spot... (It usually works its way out once you start running and heating up the tires again...)
A lot of guys I know, who store their antique cars on their concrete garage floors, usually insist on jacking them up off the floor. (Their theory is two fold...)
First, they usually have OEM rubber (non-radial tires) with polyester chords and don't want to create the flat spot from the weight, and don't want their tires sticking the the floor.
Second, they also paint the floor with an epoxy enamel to seal the concrete. (Which always remains porous.)
But as far as “sucking” out the oils… look for a stain in the concrete when you move your bike…
BTW: It’s been a long time since I was “up north”, but I remember when I worked for the Sears Tire center (about 3 million years ago) they always told customers not to store or charge batteries directly on concrete during the winter…)