1999
DOI: 10.1144/petgeo.5.1.31
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Relationship between remaining oil saturation after waterflooding and rock/flow properties at laboratory and reservoir scale

Abstract: The dependency of waterflood remaining oil saturation (S or ) on intial water saturation (S wi ), wettability and flow rate has been studied in the laboratory at core scale. For both water-wet and mixed-wet cores, S or was found to be inversely proportional to S wi . For mixed-wet cores, S or was also found to be inversely proportional to the number of pore volumes injected. In contrast, water-wet cores showed a dependency between S or and flow rate, indicating that pore structure plays an important role.The o… Show more

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Cited by 8 publications
(3 citation statements)
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“…Recently, in-situ measurements, mainly by saturation logs, shows that 0.20 is a more probable value. 23 Based on the sensitivity runs, test designs were proposed for both candidates. The proposed test designs for both candidates are summarized in Table 4, together with a listing of the main advantages and disadvantages of each candidate.…”
Section: Simulation Of Possible Pilot Tests: Results and Discussionmentioning
confidence: 99%
“…Recently, in-situ measurements, mainly by saturation logs, shows that 0.20 is a more probable value. 23 Based on the sensitivity runs, test designs were proposed for both candidates. The proposed test designs for both candidates are summarized in Table 4, together with a listing of the main advantages and disadvantages of each candidate.…”
Section: Simulation Of Possible Pilot Tests: Results and Discussionmentioning
confidence: 99%
“…The reduction in S or is known to be a main mechanism in surfactant flooding of water wet formations [1,2] . The final S or can be very hard to reach experimentally due to capillary end effects and the low permeable tail of the oil relative permeability curve [4,5] . In mixed-wet formations, remaining oil saturation (ROS) after water flooding is typically much lower [3] than in water-wet medium.…”
Section: Introductionmentioning
confidence: 99%
“…Typically, k r (N c ) is solely based on core flood experiments. The final S or can be very hard to reach experimentally due to capillary end effects and the low permeable tail of the oil relative permeability curve [4,5] . Effects of reducing the interfacial tension, IFT, are investigated in various models by numerical simulation of the displacement process and by steady-state upscaling.…”
mentioning
confidence: 99%