The simulation of technological process in the oil pipelines system is considered in the paper. The solution of the task meets a number of difficulties originating during control and operation of distributed technological complexes (TC). One of main features is the taking into consideration numerous disturbances of objective and subjective character. The structure of system simulation model of distributed complex of oil production activity, waste-handling and haul is proposed. The detailed representation of structure and processes taking place in the TC, and also external environment that intensifies model adequacy and enables to obtain objective enough and authentic results close to reality.