[math-fun] Free surface effect

I just learned about free surface effect: https://en.m.wikipedia.org/wiki/Free_surface_effect And it makes me wonder: imagine a cross section blueprint of a ship perpendicular to the keel. We want to design the cross section of an oil compartment that will run stem to stern and minimizes free surface effect. To keep it simple, let's just consider a static case where the ship has listed to port or starboard and the fluid in our tank has settled. The tank is, say, 50% full. Can tank shape affect the ship's change in center of gravity?