Use of simulation modeling for predicting optimization of repair works at oil and gas production enterprises.

There is substantiated the expediency of using the methods of the queuing theory for supporting various business processes at enterprises. The task of mass service for the organization and management of repair services of oil and gas producing enterprises has been set. It is stated that the objective function of solving this task is the sum of costs for maintaining repair crews and the reduction of losses from well downtime. It is proved that to solve the problem of optimizing the process of repair work at the researched enterprises it is necessary to use modeling as one of the effective tools of prediction, which do not require to bring the researched models to a specific form and allows to predict systems in different states and industries. A simulation model of the organization of repair works in wells is given. Testing of simulation models is carried out on the example of the fields of the three largest oil and gas producing enterprises in the Western region of Ukraine, it allowed to establish the laws of distribution of failures of oilfield equipment on fields, the process of which includes operations related to the creation, transformation and implementation of random events, quantities and processes that cause random changes in the state of the system. And also, to make calculations of the optimal between-repairs periods, total costs of well servicing processes, losses from their downtimes and optimum quantity of crews at various options of intensity of failures.