Abstract

CELI, Jonathan; GOMEZ, Franklin  and  ENRIQUEZ, Bolívar. Analysis of the Interfacial Tension Between Two Immiscible Fluids with the Use of Four Surfactants (Cationic, Non-Ionic), From the "Ui" Producing Sand of the Pindo Field. Rev Politéc. (Quito) [online]. 2021, vol.47, n.2, pp.27-40. ISSN 2477-8990.  https://doi.org/10.33333/rp.vol47n2.03.

The application of enhanced oil recovery can increase the recovery factor by more than 20%, after the use of primary and secondary recovery. For the recuperation of this remnant oil inside the reservoirs, it can inject fluids with a surfactant, which is inside of enhanced oil recovery. This research was conducted to examine the interfacial and superficial tensions with the use of four commercial surfactants in different concentrations. Generating curves to analyze the variation of interfacial tension between two immiscible fluids (injection water with surfactant and petroleum). This work was developed in three phases. In the first one, were analyzed the properties of water (salinity and concentration of dissolved solids), surfactant (pH and infrared spectrometry), and petroleum (API). In the second phase, the superficial tension (ST) was measured in a mixture of injection water and surfactant at different concentrations in order to obtain their critical micellar concentration (CMC). Finally, in the third phase, the measurement of interfacial tensions (IFT) in a mixture of the immiscible fluids. That is a mixture of injection water, surfactant, and oil from the Pindo field. Fluid samples were provided by Petrosud Petroriva company. With the results, it was proceeded to generate curves of superficial and interfacial tension Vs concentration. The surfactant HALMX152805-2, which is a nonionic type with functional groups of alkyl and hydroxyl with 0,3% of weight concentration, had the greatest reduction in both CMC and IFT.

Keywords : Immiscible; Infrared Spectroscopy; Interfacial Tension; Micelar Critical Concentration; Surfactant.

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