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espanolDurante la inyeccion de polimeros en procesos de recobro mejorado de petroleo, las moleculas polimericas son atraidas a la superficie de la roca como resultado de una serie de interacciones entre ambos componentes, llevando finalmente a una disminucion en la concentracion del bache inyectado. Este fenomeno, conocido como adsorcion [18], depende del tipo de roca, grado de hidrolisis y concentracion del polimero, temperatura del yacimiento, salinidad del agua de formacion, entre otros, y puede ser estimado a partir de modelos analiticos. Este trabajo muestra los resultados de 144 pruebas estaticas, en donde la salinidad (NaCl y CaCl2) y la concentracion de polimero se tomaron como parametros a variar, con el fin de determinar cual de los modelos analiticos es capaz de predecir en una forma mas acertada los resultados experimentales. Finalmente se discute la tendencia anormal de la adsorcion en presencia de NaCl, donde mayores valores de salinidad resultaron en menores valores de adsorcion, como respuesta principalmente a la floculacion de la caolinita EnglishDuring polymer injection in enhanced oil recovery processes, polymeric molecules are attached to the rock surface as a result of a series of interactions between both components, leading to concentration decrease on the injected batch. This phenomenon, known as adsorption [18], can be estimated by analytical models and depends on several factors like the type of rock, degree of hydrolysis and polymer concentration, reservoir temperature, salinity of formation water, among other aspects. This paper shows the results of 144 statics tests where salinity (NaCl and CaCl2) and polymer concentration were taken as the parameters to be changed in order to determine which analytical model is the most accurate for the prediction of experimental results. The abnormal adsorption tendency with NaCl, indicates that the grater salinity value, the lesser adsorption value concentrations. This is mainly due to the response of the kaolinite substrate to flocculation

Polymer adsorption isotherms with NaCl and CaCl2 on kaolinite substrates