Interfacial behavior of fluids in contact with sandstone is governed to a large extent by their surface electrochemical characteristics, pH of the surroundings, concentration of the dissolved ionic species and the existence of any surfactant control surface properties. In this study electrokinetic properties of sandstone are reported as a function of the pH and in the presence of different concentrations of sodium chloride, modified natural polymers and anionic and nonionic surfactants. Mechanisms of adsorption of the previous mentioned surfactants on sandstone are discussed. Measurements of wettability and a correlation between the electrokinetic results are investigated. The surface electrochemical characteristics of the sand was found to play a governing role in determining the mechanisms of adsorption of the studied surfactants.

Keywords:
sand particle, surface charge, electrophoresis technique, adsorption, characteristic, study adsorption, zeta potential, particle, surface active agent, wettability
Subjects:
Improved and Enhanced Recovery, Formation Evaluation & Management, Information Management and Systems, Data mining, Artificial intelligence
Copyright 2003, Society of Petroleum Engineers
You can access this article if you purchase or spend a download.