Application of periodic mode during the operation of oil wells at the late stage of development

Abstract

Currently, the number of wells operating with a high water cut is growing every year. This leads to a decrease in the profitability of operating oil fields, since the time and energy costs for processing well products increase, and the amount of oil at the output decreases. Thus, optimizing the operating mode of wells in order to reduce water cut by transferring them to periodic mode is one of the key tasks to increase the productivity of oil field development. Oil fields at a late stage of development are characterized by a decrease in oil production volumes and an increase in water cut in well production, as well as a deterioration in the structure of reserves. Residual oil production under difficult conditions plays an important role in maintaining overall field productivity. Low-yield wells can be used to additionally recover oil that was previously unable to be produced during the initial development of wells. In addition, the operation of low-yield wells at a late stage of development makes it possible to reduce the cost of drilling new wells. This article is devoted to the study and updating of this issue. Work continued on the study of converting wells from constant to periodic mode in order to increase technological development indicators, such as reducing the volume of produced water, reducing the specific energy consumption per ton of oil produced and increasing the turnaround time for installing an electric centrifugal pump. An analysis of well operation in constant and periodic modes was carried out for the conditions of the Surgut field. It is shown that transferring the well to periodic mode will reduce the cost of electricity consumption.