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USING PHASE DIAGRAMS TO PREDICT THE PERFORMANCE OF COSOLVENT FLOODS FOR NAPL REMEDIATION
Citation:
Falta, R. W. USING PHASE DIAGRAMS TO PREDICT THE PERFORMANCE OF COSOLVENT FLOODS FOR NAPL REMEDIATION. GROUNDWATER MONITORING AND REMEDIATION. Wiley InterScience, Silver Spring, MD, 18(3):94-102, (1998).
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Description:
Cosolvent flooding using water miscible solvents such as alcohols has been proposed as an in-situ NAPL remediation technique. This process is conceptually similar to enhanced oil recovery (EOR) using alcohols and some surfactant formulations. As a result of interest in the EOR aspects of these systems, analytical and graphical methods based on fractional flow theory were developed in the petroleum engineering literature for modeling these floods. The fractional flow solutions have not been used previously in environmental applications of cosolvent flooding, but they are applicable, and provide many useful insights into the process. These applications are discussed, with an emphasis on explaining the mechanisms which tend to mobilize trapped NAPL during a cosolvent flood. The theory provides a simple way to predict the general behavior of a cosolvenmt flood using the phase diagram. This is illustrated by a review of several NAPL remediation experiments reported in the literature.
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USING PHASE DIAGRAMS TO PREDICT THE PERFORMANCE OF COSOLVENT FLOODS FOR NAPL REMEDIATION