SPE Annual Technical Conference and Exhibition 2009
DOI: 10.2118/136194-stu
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Pore-Level Mechanisms of Surfactant-Enhanced Oil Recovery

Abstract: The technique of injecting water is used for about 50% of the world's oil production. However, recovery efficiency of water injection in fractured reservoirs can be very low because, guided by capillary forces, the injected fluid will preferentially flow in the fractures rather than through the matrix. As a result, most of the oil in the matrix is not contacted by the injected water and remains within the matrix. To access this oil, the role of capillary forces on fluid flow can be minimized by adding surfacta… Show more

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Cited by 2 publications
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“…The observation of residual oil evolution during waterflooding… oil recovery and to design improved waterflooding projects [16][17][18]. Since the theory relating the NMR relaxation time of water in porous media to the pore size distribution was first proposed by Loren and Robinson [19], there have been numerous attempts to characterize the pore-level fluid distributions with respect to the sizes of the pores occupied by the fluid [5,[20][21][22].Generally, longer transverse relaxation times reflect larger pore sizes.…”
Section: Fig 4 Comparison Of the Oil Saturation Values Obtained By Imentioning
confidence: 99%
“…The observation of residual oil evolution during waterflooding… oil recovery and to design improved waterflooding projects [16][17][18]. Since the theory relating the NMR relaxation time of water in porous media to the pore size distribution was first proposed by Loren and Robinson [19], there have been numerous attempts to characterize the pore-level fluid distributions with respect to the sizes of the pores occupied by the fluid [5,[20][21][22].Generally, longer transverse relaxation times reflect larger pore sizes.…”
Section: Fig 4 Comparison Of the Oil Saturation Values Obtained By Imentioning
confidence: 99%