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An experimental investigation of surfactant flooding as a good candidate for enhancing oil recovery from fractured reservoirs using one-quarter five spot micromodels: The role of fracture geometrical properties
, Article Energy Sources, Part A: Recovery, Utilization and Environmental Effects ; Volume 35, Issue 20 , 2013 , Pages 1929-1938 ; 15567036 (ISSN) ; Ghazanfari, M. H ; Kharrat, R ; Rashtchian, D ; Sharif University of Technology
2013
Abstract
Surfactant flooding is known to lower the interfacial tension and, hence, reduces capillary forces responsible for trapping oil. Despite numerous experimental studies, little is known about the role of fracture geometrical properties on oil recovery efficiency during surfactant floods, especially in five-spot systems. In addition, application of sodium dodecyl sulfate for oil recovery in fractured media is not discussed well. In this study, two types of surfactant solutions have been injected into micromodels, which were initially saturated with crude oil, having different length, orientation, and distribution of fractures under oil-wet conditions. Precise analyses of continuously recorded...