Multilateral-well technology is revolutionizing the way that reservoirs are accessed by wells. The ability to create wells with multiple branches that can target widely spaced reservoir compartments provides engineers unlimited options in optimizing economic extraction of oil and gas. Along with this opportunity comes the inherent complexity of these well architectures. Multilateral Wells is intended to illuminate the most important aspects of multilateral wells in a concise way and give readers practical tools they can apply in the design and analysis of multilateral wells, while also pointing to the appropriate literature for more advanced studies.