The problems of developing oil rims are well known and relevant. Advance watering and an increase in the gas content of the production leads to a decrease in the relative phase permeability for oil, which leads to a decrease in oil recovery of the reservoir and a low recovery of reserves. Barrier flooding is one of the most effective methods of stimulation used in oil production from gas cap zones. One of the main problems in this type of waterflooding is the correctness of its organization. The complex system of two-phase filtration of oil and gas, as well as the ambiguity of the location of the gas-oil contact (GOC) in the reservoir should be taken into account when introducing barrier flooding as the main impact on the oil rim. The article analyzes the barrier waterflooding system introduced at the Vereisky site of the Kiengopskoye field. Based on the analysis of field data, a technological solution is presented to improve the efficiency of barrier flooding by preventing gas breakthrough from the gas cap, reducing the gas factor in the production well.
Materials and methods
Based on practical evidence.
barrier flooding, GOR, oil rim, gas cap, gas breakthrough, injection well