2018
DOI: 10.1007/s13202-018-0465-0
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Abstract: The volumetric sweep efficiencies of CO 2 flooding for enhanced oil recovery (EOR) are generally low due to problems of viscous fingering and gravity override. This paper attempts to study a relatively new and promising method to reduce the mobility of CO 2 flooding and increase oil recovery under reservoir conditions. Referred to as alkaline-surfactant-alternatedgas/CO 2 (ASAG) flooding, this method is essentially the synergic combination of chemical and immiscible CO 2 flooding. In this work, chemical formul… Show more

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Cited by 30 publications
(12 citation statements)
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“…The nonylphenol ethoxylate sulfonate (NPES), a newly synthesized CO 2 philic surfactant, has also been reported to have a great potential in CO 2 EOR applications for reducing the interfacial tension and CO 2 mobility (Sagir et al 2016). A recent study on surfactant-alternating gas/CO 2 (SAG) and alkaline surfactant-alternating gas/CO 2 (ASAG) shows a better recovery results than that of WAG (Phukan et al 2019).…”
Section: Introductionmentioning
confidence: 99%
See 1 more Smart Citation
“…The nonylphenol ethoxylate sulfonate (NPES), a newly synthesized CO 2 philic surfactant, has also been reported to have a great potential in CO 2 EOR applications for reducing the interfacial tension and CO 2 mobility (Sagir et al 2016). A recent study on surfactant-alternating gas/CO 2 (SAG) and alkaline surfactant-alternating gas/CO 2 (ASAG) shows a better recovery results than that of WAG (Phukan et al 2019).…”
Section: Introductionmentioning
confidence: 99%
“…Akai et al 2015;Shi et al 2016;Sagir et al 2016;Phukan et al 2019;Zifar and Pourafshary 2019). These microbubbles with a dominant size of 10-50 µm were injected into SP#1 sandpack whose Microbubbles observation behavior a at an initial hour, b after 24 h, c microbubble size change for 24 h Microscopic images of microbubble at a an initial hour, b 6 h, c 12 h, d 18 h, e 24 h, f agglomerated microbubbles…”
mentioning
confidence: 99%
“…The porosity of the reservoir is approximately in the range of 23-29% and absolute permeability is in between 50-94 mD. The crude oil was medium gravity (API gravity 34°) with acid number < 1.7 mg of KOH/gm, (Phukan et al 2018).…”
Section: Reservoir Descriptionmentioning
confidence: 99%
“…This formula has been shown to be valid for L D > 4 , if the length of the drop exceeds 4 times its diameter. Since the centrifugal acceleration is not constant along the elongated drop, therefore, the radius at the tip is not equal to that in center (Phukan et al 2018;Hazarika et al 2018).…”
Section: Equilibrium Ift Measurementsmentioning
confidence: 99%
“…Alkaline injection has also been coupled with other enhanced oil recovery methods including surfactant injection [20], polymer injection [21,22], polymer and surfactant flooding [23][24][25][26], smart water injection [27], and even steam-assisted gravity drainage [28]. Potts and Kuehne [29] underwent experiments using fired Berea sandstone cores and reservoir cores to compare the difference between both when undergoing polymer/alkaline injection.…”
Section: Introductionmentioning
confidence: 99%