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An integrated approach to modeling implies the construction of a single digital model of the object, which consists of related models of the reservoir, wells and surface facilities. The integrated model makes it possible not only to optimize the operation of surface elements, but also to take into account the mutual influence of system objects. Creation of a permanently operating integrated model (PDIM) is of great practical importance in PJSC NK Rosneft, since it allows performing long-term calculations for various scenarios of gas production, as well as substantiating rational technological modes of gas field operation. The paper examines the stages of building an integrated model of a gas field in the Turonian reservoir of one of the fields in Western Siberia, the main elements of which are: a three-dimensional hydrodynamic model, well models and a surface infrastructure model. The Petroleum Experts software package (Prosper, Gap, Resolve) is used to create a model and carry out calculations. The article analyzes the predicted technological indicators of the gas field operation according to the base case, on the basis of which optimization approaches to the development of the Turonian deposit are formed. The authors have proposed an option that takes into account the operation of mobile compressor units (MCU) in order to reduce capital investments for large site facilities. The paper also considers the option of reconfiguring the gas gathering network (GSS), which provides for a decrease in the number of collectors. The option will reduce the cost of construction of the GSS and minimize the mutual influence of the work of the bushes on each other. Summing up, a technical and economic assessment of the base and alternative options was carried out, based on the results of which the most rational option for the development of the T.

Existing approaches to the creation of hydrodynamic model based on a single implementation of the geological model, lead to difficulties in adaptation – there is a need for additional artificial adjustments of the initial data, and, as a consequence, inaccurate assessment of the projected technological parameters of the development. In order to make balanced investment decisions on the development of deposits, it is necessary to take a comprehensive approach to the assessment of possible uncertainties. To solve this problem, the iterative modeling approach is used, which provides a comprehensive assessment of possible variants of geological and technological models and allows you to vary the parameters of the model to assess uncertainty and risks in the calculation process. The article describes the process of creating and selecting the most likely implementation of the geological model of the PK1 formation, providing the best adaptation to the history of development and minimal uncertainty in the prediction of technological parameters for the medium and long term. Implementations of the model include variations of the seismic base, distribution of the lithology parameter, filtration-capacitance properties of non-collectors, the volume of the aquifer and its activity. In the process of work at the first stage, the basic implementation of the geological model was created, at the second stage of them on the basis of the developed complex parameter characterizing the degree of adaptation of the hydrodynamic model, the most probable was chosen.

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