How far out the water is pulled depends on the size of the olla and the quality of the soil. Dense soil (clay) does not water out as far as good soil. Large ollas, with a capacity of (say) 11 liters, will water longer than a smaller 1 liter olla, for example.
The distance that water is drawn from an olla varies based on the size of the container and the condition of the earth. Clayey soil restricts water's reach compared to well-drained soil. Larger containers can provide water for a longer period than smaller ones, like a 1-liter olla.