New in the range of reagents and technologies for chemical enhanced oil recovery in high-temperature reservoirs

Abstract

Currently, numerous enhanced oil recovery reagents and application technologies have been developed in the domains of flow rejection and injection profile levelling. The choice of stimulation methods is reliant on the geological and physical conditions of the reservoir. Therefore, the accuracy of this choice has a direct impact on the efficiency of implementing enhanced oil recovery technologies.The current availability of low-volume chemical enhanced oil recovery reagents for high-temperature reservoirs is limited, and their effectiveness varies. This article presents the results of a pilot study from 2018 to 2021 aimed at improving oil recovery in high-temperature reservoirs. The study involves evaluating approved levelling technologies for injection profiles that use thermotropic compositions "Complex 377" and "EOR701R", as well as the polymer composition "EOR909R". The geological and physical conditions of their approbation, as well as the primary injection parameters and resulting findings, are provided.This information will be valuable to professionals engaged in enhanced oil recovery methods for oil reservoirs, as well as those working on the implementation of physical and chemical methods for the same purpose.