ANALYSIS OF THE IMPACT OF CHEMICAL METHODS ON THE NEAR-WELLBORE ZONE OF THE RESERVOIR

The efficiency of oil well operation during field development is directly linked to the condition of the near-wellbore zone (NWZ), which is highly susceptible to various physical, chemical, and thermodynamic changes. Usually, the filtration properties of the reservoir rocks in the NWZ degrade due to technological factors such as contamination of the filter by drilling mud and kill fluids, resulting in reduced permeability compared to the more remote zones of the formation. Contact with aquifer layers and significant heterogeneity in permeability can lead to water breakthrough and may cause partial or full abandonment of low-permeability intervals. Therefore, it is necessary to implement measures aimed at increasing the filtration capacity of the rocks in the NWZ, leveling flow profiles and productivity, and eliminating zones of delayed water coning and water breakthrough. Typically, such operations are the primary means of bringing wells to optimal operating regimes. This work is dedicated to addressing the issues of increasing the efficiency of oil well operation through improving the condition of the near-wellbore zone (NWZ). Specifically, it examines the effects of technological factors such as filter contamination, as well as the features of hydrodynamic processes, including water breakthrough and hydrodynamic heterogeneity. Methods for enhancing the filtration capacity of the rocks, stabilizing flow profiles, and eliminating zones of delayed water breakthrough are proposed. These measures contribute to increasing recoverable oil and improving the overall effectiveness of field development. Keywords: Сhemical methods, reservoir permeability near-wellbore zone, formation damage, chemical treatment.