Experience in creating and using an integrated “reservoir-well-surface” model to support and optimize a multi-layer field in Western Siberia

Introduction. In modern conditions, the limitations of oil production associated with OPEC+ make it urgent to redistribute production between wells in order to reduce the water content of products and unload the collection network. Making decisions about the optimal distribution of flow rates is often complicated by the interference of wells, which can affect each other both through the reservoir and through the collection system. Therefore, to optimize the operation of the fishery, it is advisable to use multivariate calculations based on an address integrated model.

Aim. In order to optimize the operation of the field in conditions of limited OPEC+ oil production, a full-scale integrated field model was built, adapted and used in development monitoring.

Materials and methods. To build an integrated model of an oil field at a late stage of development, optimal methods for accounting for producing wells in periodic operation, modeling paraffin deposition processes, tools for modeling wells with leaks, accounting for joint wells developing several EOS simultaneously are proposed. The full-scale integrated non-isothermal model of the field includes 7 hydrodynamic models, more than 400 models of producing and injection wells, models of the absorption system, a model of the PPD system including local injection, models of secondary development facilities and the Cenomanian aquifer constructed by the material balance method. The main feature of the implemented model is a large fund of operating wells, the periodic nature of the work of a significant part of the fund, many leaks, as well as complications associated with the loss of paraffins.

Results. The applied methods of optimization of the integrated model made it possible to carry out multivariate calculations with the implementation of various strategies for entering the fi eld into the OPEC+ production limits according to the most economically profitable scenario. The high calculation speed of a full-scale integrated fi eld model has allowed us to create a useful additional development monitoring tool.

Conclusion. The results obtained confirm the effectiveness of using a full-scale integrated model of an oil field at a late stage when monitoring development and making decisions.

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