Modeling tools used for operational field development management

The increase in the share of hard-to-recover reserves increases the need to use modern technologies in the development of oil fields to increase the efficiency of reserves development. One of the tools for identifying zones with hard-to-recover reserves is the geological and hydrodynamic model, which allows simulating various geological and technical measures carried out on production and injection wells. It is possible to lay down both predicted and already carried out measures for testing hypotheses and making decisions on field development. In this work, we have considered the area where the problem of premature water flooding of products has been identified from a certain period of time. After an analytical review of the site, a theory was put forward about the source of water flooding. In the analyzed area there is also a horizontal well, which is not currently in operation. The well was fractured immediately after drilling. The well was put into operation with a high water cut and shut down, and no crossflows were detected during additional field geophysical surveys. In terms of indirect parameters (properties of produced water, pressure, parameters during hydraulic fracturing), the created fracture overcame the clay bridge and created a hydrodynamic connection with the underlying aquifer. Based on the analysis, a theory was put forward that the formation water of the lower aquifer along the fracture of the frac migrated to the zone of extraction of the productive oil formation due to the large difference in the current formation pressure between the facilities. The hypothesis is confirmed by calculations on the hydrodynamic model. Several options were proposed at the end of the site to slow further water breakthrough to the production wells. Among them, the injection of various polymer-based compositions into a horizontal well is a «source».