a laboratory investigation into wettability alteration of carbonate rock by surfactants: the effect of salinity, ph, and surfactant concentration

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ID: 203253
2014
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Ranked #11 of 51 articles by views in ieee transactions on image processing : a publication of the ieee signal processing society

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Abstract
Wettability alteration is an important method for increasing oil recovery from oil-wet carbonate reservoirs. Chemical agents like surfactants are known as wettability modifiers in carbonate systems. Oil can be recovered from initially oil-wet carbonate reservoirs by wettability alteration from oil-wet to water-wet condition with adding dilute surfactant and electrolyte solutions. This paper investigates the effects of brine concentration, surfactant concentration, and the pH of injection water on the wettability alteration of carbonate reservoirs by different class of surfactants. Scanning electron microscopy images verified the formation of surfactant layer surfaces and the adsorption of surfactant molecules on the rock. The results revealed that TX-100, as a nonionic surfactant, and CTAB, as a cationic surfactant, were better wettability modifiers than SDS, as an anionic surfactant, for carbonate rocks. At the concentration of 1 wt.% and higher, the contact angle reduction was approximately unchanged. The results also proved that there was an optimum salinity for the maximum wettability alteration by surfactants. Increasing the pH of aging fluid resulted in better wettability alteration by CTAB, while, in the case of SDS, the wettability alteration was reduced. Acidic conditions had a negligible effect on the wetting behavior of TX-100.
Reference Key
mohammadi2014iraniana Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Mohsen Seid Mohammadi;Jamshid Moghadasi;Amin Kordestany
Journal ieee transactions on image processing : a publication of the ieee signal processing society
Year 2014
DOI
10.22050/ijogst.2014.6617
URL
http://ijogst.put.ac.ir/article_6617_94f6ffacbc4b78a60e2820e1b1fbfb19.pdf
Keywords
vulnerability methylphenidate attention deficit hyperactivity disorder (adhd) contact angle surfactant bibliography wettability alteration information resources library science petroleum productsgas industry working memory functionpsychiatry

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