The article represents the areas of application and experience of using the high-tech engineering simulator RN-SIMTEP to solve the tasks of designing linear and area facilities of oilfield surface infrastructure. The simulator features overview is provided in terms of modeling multiphase flows in pipeline networks and equipment for oil, gas and water treatment, including complications and the use of inhibitors. Particular attention is paid to the simulator capabilities of modeling gas and gas condensate field facilities. The RN-SIMTEP simulator features were compared with software analogues. Examples of using the simulator for the tasks of designing new facilities, technological upgrading or reengineering of existing facilities are given. Approbation of the simulator showed that the RN-SIMTEP calculation results correspond to the similar software calculation results. Thus, the RN-SIMTEP simulator is a single environment for modeling and analyzing calculation results, and it can replace the use of several third-party software packages. It is demonstrated that the RN-SIMTEP simulator can be applied for joint calculations of pipeline systems for production fluid gathering, treatment and transportation, and also for creating «digital twins» of oilfield surface facilities. It is concluded that using digital models of processing facilities enables to optimize operating modes of surface facilities, predict complications at these facilities, plan corrective actions to minimize the risk of complications and, consequently, obtain a number of economic effects in oilfield development.
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