In one example of forming multilateral wells in unconventional reservoirs, a subterranean zone is drilled using a drilling rig to form a main wellbore. Using the drilling rig, the subterranean zone is drilled to form a lateral wellbore off the main wellbore. The drilling rig is removed after forming a multilateral well including the main wellbore and the lateral wellbore. Using a fracturing system, a fracture treatment is performed on the lateral wellbore.
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