Novo artigo publicado!! Physicochemical evaluation of the use of alcoholic micellar solutions containing nonylphenol and ethanol for the acidizing of carbonate matrices (2022)

29/07/2022

https://doi.org/10.1016/j.colsurfa.2022.129821

(Colloids and Surfaces A: Physicochemical and Engineering Aspects)

Autores: Guilherme Mentges Arruda, Dennys Correia da Silva, Gerion Silvestre de Azevedo, Edney Rafael Viana Pinheiro Galvão, Marcos Allyson Rodrigues e Alcides de Oliveira Wanderley Neto

Os autores agradecem ao Laboratório de Tecnologia de Tensoativos e Processos de Separação (LTT/IQ/UFRN), ao Laboratório de Membranas e Coloides (LAMECO/IQ/UFRN) e ao Laboratório de Peneiras Moleculares (LABPEMOL/IQ/UFRN) da Instituto de Química (IQ) da Universidade Federal do Rio Grande do Norte (UFRN) pela infraestrutura, equipamentos e técnicas utilizadas neste manuscrito; e ao PRH-ANP-26.1 e FINEP pelas amostras de carbonato e apoio financeiro.

Acid stimulation presents a great challenge when it comes to reducing the reaction rate between hydrochloric acid and carbonate rock, which makes it possible to increase the depth of the injected solutions. The surfactants are excellent candidates to reduce the reaction rate and make the rock water-wettable. However, high temperatures and the presence of salts as a product of the acidizing reaction can affect the performance of surfactants under reservoir conditions. In the present study, acidified alcoholic micellar solutions were obtained containing nonylphenol surfactant of 100, 40, and 11 ethoxylated bonds and ethanol as an amphi-solvent to assist the maintenance of the surfactant properties under adverse conditions. The solutions were characterized before and after the acidizing reactions (absence and presence of salt, respectively), evaluating the cloud point, surface tension, and kinematic viscosity. The experiments revealed that ethanol assisted in maintaining or improving the cloud point of the formulations, reaching above 70 °C. [...]

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