Multilateral wells are wells that have more than one branch radiating from the main borehole (Figure 165). Each branch can drain a separate part of the reservoir and produce into a common single wellbore. The advantage of multilateral wells is that, for the same number of drainage points, they can be somewhat cheaper than if separate wells had been drilled. | Multilateral wells are wells that have more than one branch radiating from the main borehole (Figure 165). Each branch can drain a separate part of the reservoir and produce into a common single wellbore. The advantage of multilateral wells is that, for the same number of drainage points, they can be somewhat cheaper than if separate wells had been drilled. |