The one of the main goals of oil and gas companies is to maintain oil production levels at long-term exploited fields and fields, which are in the final stage of its development. Generally, the drilling of sidetracks and horizontal wells becomes the primary means of well productivity increasing on highly flooded and marginal fields. The knowledge of the field geological structure and its current oil reserves distribution allows to plan effectively the horizontal wells borehole trajectories. The geological and hydrodynamic models become the main means for recoverable oil reserves localization. Reliable filtration models can be used to identify the most effective zones with profitable oil reserves.
The solutions, considered in this paper, are directed to refine the location of sand bodies with high-density mobile oil reserves in three-dimensional space of hydrodynamic models. We can modify the map of oil reserves density by using that information about sand bodies and use it to plan the horizontal well placement. In addition, the paper discusses the method for waterflooding factor calculation, based on Buckley – Leverett equation. The methods, described in the work, allow to increase the cumulative oil production for the field, which is in the final stage of its development.
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