Changes

==Multilateral wells==

==Multilateral wells==

[[File:M91Figure165.JPG|thumb|300px|{{figure number|5}}Multilateral wells in the Tern field, UK North Sea (from Black et al., 1999). Reprinted with permission from the Geological Society.]]

[[File:M91Figure165.JPG|thumb|300px|{{figure number|5}}Multilateral wells in the Tern field, UK North Sea (from Black et al).<ref>Black, R. C., H. J. Poelen, M. J. Roberts, and S. E. Roddy, 1999, Tern field development: A marriage of new technologies for business benefit, in A. J. Fleet and S. A. R. Boldy, eds., Petroleum geology of northwest Europe: Proceedings of the 5th Conference, Geological Society (London), p. 1063–1073.</ref> Reprinted with permission from the Geological Society.]]

Multilateral wells are wells that have more than one branch radiating from the main borehole ([[:File:M91Figure165.JPG|Figure 5]]). 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 ([[:File:M91Figure165.JPG|Figure 5]]). 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.