To the question of increasing oil recovery of formations with isolation of water influctions of the foundation of the «White Tiger» field

Abstract

The article deals with the problem of enhanced oil recovery (EOR), which arises in connection with the steady decline in oil production and active depletion of reserves. The water cut of production wells leads to a decrease in oil production and a decrease in the rate of recovery of recoverable reserves. Among the factors influencing this process, both an increase in the water cut of the productive formation itself and the presence of cracks in the layers below the productive formation lead to a decrease in the effectiveness of the third methods of treatment. In this case, water ingress into the reservoir from fractured reservoirs below the reservoir or inefficient use of a certain part of the water injected into the reservoir to displace oil from the reservoir through fractures leads to a decrease in the oil recovery factor. Therefore, creating a screen at the bottom of the productive formation can ensure the efficiency of work. For this purpose, experiments were carried out in the direction of preparing a composition for waterproofing works using certain reagents. Here, the mechanism of interaction of aluminum chloride with alkaline reagents was studied and their optimal ratio in EOR technologies was evaluated. Water-insoluble precipitates are formed as a result of the interaction of aluminum chloride and alkaline reagents. Keywords: field; oil recovery; reaction; alkali; reagents; temperature; foundation.