This work considers the approach to the creation of a conceptual geological-simulation model with regard to the facies features of the Achimov deposits. The method of creating a geological 3D model consists in the step-by-step analysis of regional geology data, stratigraphic, seismic-facies, lithologic-facial and petrophysical analysis, and next cluster analysis for binding wells without cores to facies groups based on well logs. Within the framework of simulation modeling, the choice of optimal development systems was made in accordance with the changing parameters of the field for various realizations of the geological model. Different methods of well completion, grid density, operation state of injection wells are considered, and development systems that are best for different facial environments are justified. A sensitivity analysis was performed and showed the sustainability of design solutions to such changing factors as the petrophysical model, the formation fluid model, the success of the fracturing, and allowed to identify the main project risks, as well as assess the magnitude of their impact on technological and economic performance indicators. The suggested methodical approach is especially relevant for Achimov deposits due to the complexity of forecasting, high degree of variability and poor knowledge of these deposits.
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