2017
DOI: 10.1155/2017/4307368
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Abstract: Capillary number theory is very important for chemical flooding enhanced oil recovery. The difference between microscopic capillary number and the microscopic one is easy to confuse. After decades of development, great progress has been made in capillary number theory and it has important but sometimes incorrect application in EOR. The capillary number theory was based on capillary tube bundles and Darcy’s law hypothesis, and this should always be kept in mind when used in chemical flooding EOR. The flow in lo… Show more

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Cited by 39 publications
(25 citation statements)
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“…Capillary numbers of about 10 –5 indicate an oil-wet state. 57,58 Nanoparticle addition to the polymer solutions increases the capillary number regarding the system in the absence of nanoparticles. The best performance was obtained with surface-modified nanoparticles, reaching values up to 10 –2 .…”
Section: Resultsmentioning
confidence: 99%
“…Capillary numbers of about 10 –5 indicate an oil-wet state. 57,58 Nanoparticle addition to the polymer solutions increases the capillary number regarding the system in the absence of nanoparticles. The best performance was obtained with surface-modified nanoparticles, reaching values up to 10 –2 .…”
Section: Resultsmentioning
confidence: 99%
“…• powyższe modyfikacje zależą od funkcji F misc , interpolującej efektywne wypieranie pomiędzy wypieraniem mieszającym i niemieszającym w zależności od liczby kapilarnej N c (Guo et al, 2017), przepływu płynów złożowych…”
Section: Mechanizmy Wypierania Ropy Wodnymi Roztworami Polimeru I śRounclassified
“…A total of 60% of crude oil generally remains underground after self-flowing and secondary oil recovery by waterflooding [4,5]. Thus, tertiary oil recovery, also referred to as “enhanced oil recovery” (EOR), is used to produce more oil [6,7,8]. Among the various EOR techniques, chemical ones, particularly surfactant flooding, are vital as they can effectively decrease oil–water interfacial tension, thereby allowing oil droplets to flow more easily through pore throats because of reduced capillary trapping through increasing the capillary number (N C ) [6].…”
Section: Introductionmentioning
confidence: 99%
“…N C is defined as the ratio of viscous force to capillary force, and represents the relative effect of viscous drag force versus interfacial tension (IFT) acting across an interface between two immiscible liquids [6], as shown below: Nc=sans-serifνμwγow where μ w and υ are the viscosity and interstitial velocity of displacing fluid, respectively; γ ow is the IFT between crude oil and water.…”
Section: Introductionmentioning
confidence: 99%