«Proceedings of Gubkin University»

Study of influence of adsorption activity of surfactants on surface wettability change for application in silencing fluids

UDC: 544.723.2.023.2
DOI: -

Authors:

¹ National University of Oil and Gas “Gubkin University”, Moscow, Russian Federation

Keywords: adsorption, hydrophobization, surfactants, wettability, killing fluids, imidazolines, oilfield chemistry

Annotation:

Nowadays the task of wells development drilled for the purpose of hard-to-recover reserves development is especially urgent. Introduction of surfactants-hydrophobizers for use in killing fluids during geological and technical activities is the most rational way to minimize negative consequences due to adsorption of surfactants on the boundary with solids with subsequent change of wettability. The purpose of this study was to analyze the adsorption activity of surfactants of different classes by computational and empirical methods. The main methods of the study were determination of interfacial tension by hanging drop method and change in wettability of porous medium by spontaneous impregnation method. It was calculated and empirically proved that the cationic surfactant GFD, based on oil-soluble imidazolines, and the zwitterionic surfactant Betaine are able to change the wettability much more than other cationic and non-ionogenic surfactants.

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