Elaboração de microfluidos de CaO a partir da concha do sururu (Mytella Charruana) encontrado em Alagoas, para aplicação em recuperação avançada de petróleo (EOR)

Abstract

Two concerns permeate the near future, environment and energy. It is estimated that the global demand for energy will increase by 50% within the next few years, as well as the demand for petroleum-derived products. However, the availability of oil is in decline, and current techniques can recover only between 20 and 40% of this oil in reservoirs, attracting great interest for technologies that can improve the recovery factor. The process of enhanced oil recovery (EOR) aims to increase displacement efficiency at microscopic and macroscopic levels, using special methods that can be chemical, thermal or biological, when conventional ones demonstrate a low recovery factor. This work aims to analyze the production of microfluids for use in EOR, increasing the recovery factor in mature reservoirs. Microfluids were produced using calcium oxide microparticles derived from sururu shells, Mytella Charruana, from irregular disposal in the state of Alagoas, which were arranged in concentrations of 0.5%, 0.1%, 0.05% m/v, in distilled water and seawater, applied a two-step technique for production, where the nanoparticle is first produced in powder form and only then dispersed in the base fluid, at the necessary concentrations. The produced microfluids were evaluated in terms of surface composition, contact angle evaluation, conductivity change and recovery efficiency in a simulated porous medium flooding test. The results mainly indicated a change in the wettability of the system in the contact angle analysis, through the evaluation of the microfluid droplet in contact with the oil-saturated rock sample, a change in the conductivity of the base fluid was also observed. For the results of the porous medium flooding test, the distilled water-based microfluids presented an additional recovery rate of 8.34% and 14.59% in the best results for the concentration of 0.1 and 0.5% (m/v). As for seawater, the best results were 7.12% and 15.85% at concentrations of 0.05 and 0.1% (m/v).