![]() ![]() La determinación de la Eficiencia de Membrana (EM) constituye una herramienta útil en el estudio del componente químico en la estabilidad de pozo, ya que es una variable de entrada en el desarrollo del modelamiento químico elástico (Lomba et al., 2000). Keywords: membrane efficiency, ionic selectivity, electrochemical potential test, wellbore stability, chemical interaction, osmosis, shales, water activity. The results obtained with the application of the proposed methodology indicate that it is possible to obtain IS and ME values through EPT in any type of argillaceous rock by applying the developed correlations. Samples of unperturbed plugs with diverse properties belonging to different Colombian formations were used. Correlations between ME and IS are applicable to any type of argillaceous rock. It is simpler and quicker than other tests used for the ME determination, like the Pressure Transmission Test (PTT). The EPT is a generic test easily applied to any rock type from any well or basin. The correlation, not reported previously in the literature, depends on the type of salt used. This method is based on the development of correlations with Ionic Selectivity (IS) values in presence of NaCl, KCl and CaCl 2 at diverse solution concentrations. This article presents a novel methodology for the determination of ME using the Electrochemical Potential Test (EPT) in shale rocks. ![]() 19, 2009)ĭetermination of Membrane Efficiency (ME) is a very useful tool in the study of the chemical component of wellbore stability since it is a variable input in chemical elastic models (Lomba, Chenevert & Sharma, 2000). 4185 Bucaramanga, Santander, ColombiaĮ-mail: e-mail: Received ApAccepted Nov. Saavedra 2ġ Universidad Industrial de Santander, UIS, Bucaramanga, Santander, ColombiaĢ Ecopetrol S.A. Jhoao Villabona-Camacho 1*, Sergio Orozco-Orozco 2*, Zuly Calderón-Carrillo 1 and Néstor-F. ![]() ![]() ASSEMBLY OF A METHODOLOGY FOR DETERMINATION OF MEMBRANE EFFICIENCY IN PRESERVED SHALES ![]()
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