The paper discusses various approaches for modeling technical operations on multilayer wells. An approximate method for simulation of the multilayer well operation is considered. The essence of the approach lies in the extension of nodal analysis method where transient flow is acting in the formation and the start of production from different layers is not simultaneous. An example of using this approach for modeling unsteady processes occurring after involving into development of new layers is given. The constructed model can be used for incremental production planning, evaluation of interstratal crossflows, as well as candidates selection.