2024 Asl In-Situ CO2 Generation Via Urea Injection: a Sustainable Approach for Enhanced Oil Recovery in Carbonate Reservoirs

Numerous studies have demonstrated that carbon dioxide flooding, either as miscible or immiscible flooding, is one of the most effective alternative methods for enhancing oil recovery. However, there are several important factors that limit the widespread application of ex-situ CO2 technology: environmental concerns, corrosion of field equipment, fast breakthroughs in CO2, dependence on natural sources of CO2, and transportation, compression, and injection costs. In order to reduce some of these limitations, we examine additional processes that can effectively generate in-situ CO2 gas (ISCG). In this study, a compositional simulator was used to simulate the process of urea injection. Results from this study indicate that injection of urea increased the recovery factor compared to ex-site injection of carbon dioxide (8.93%), as well as improving the wettability of the rock surface. A new insight has been provided concerning the effect of urea as a potential source of CO2 production on the enhancement of oil recovery in carbonate formations based on the results of this study.

Refer to: https://www.earthdoc.org/content/papers/10.3997/2214-4609.202410703

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