Dynamics of Changes in Oil Composition at the Development of the Usinsk Deposit

To test new materials used for enhanced oil recovery, methods are needed for determining the effectiveness of their impact on the oil reservoir. Monitoring can be performed by analyzing reservoir fluids with a changed composition of oil. In the Usinsk deposit, a complex injection of surfactant compositions and the gel composition was carried out by the technology developed in the IPC SB RAS. The technology of the use of gel compositions is based on aluminum chloride and urea (GALKA-NT technology), and the technology of the use of surfactants is based on surfactant solutions and urea (IPC-PRO). The study shows that the use of gradient and displacement chromatography could effectively maintain a control over the development of the field where new materials and reagents are used for enhanced oil recovery. The change in the oil composition reflects processes occurring in the reservoir, which allows a purposeful regulation of them.