Adsorção de tensoativos e polímero em rocha reservatório

• Autor(a) principal: Cunha Bisneto, Manuel Carneiro
• Data de Publicação: 2015
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UFRN
• Texto Completo: https://repositorio.ufrn.br/handle/123456789/38364
• topic: Rocha reservatório.; Rock reservoir.; Adsorção - Quimica; Tamanho de partícula.; Quitosana - Química.

In the process of oil exploration where the energy in the formation is insufficient to produce oil of course, it is necessary to intervene in the well and this process is entitled to oil recovery, which may be referred to as enhanced oil recovery when using chemical processes, such as systems based on surfactants and polyelectrolytes. The surfactants have the property of adsorbing interface lowering the interfacial tension and facilitating the flow of oil from the rock pores to the inside of the reservoir while the polymer has the property of moving the oil bank from the high viscosity systems polymeric offers. The polyelectrolytes may also adsorb on the rock. To better understand the recovery process is necessary to study the phenomena of chemical adsorption of molecules in the reservoir rock and this was applied the techniques zeta potential and dynamic light scattering. The sandstone rock has negative charge and adding the acetic acid solution the load reverses, becoming positive. The anionic surfactant, OCS and SDS adsorb the sandstone at concentrations below and above the critical micelle concentration (CMC). Chitosan also adsorbs considerably sandstone. The adsorption takes place until such time that saturates the entire surface of the sandstone particles and the concentration of saturation for the chitosan and SDS is 0.005%, while for the OCS there is a critical value of saturation as there is a phenomenon of protonation. For the combination of chitosan-OCS saturation occurs at 0.002%, while for chitosan SDS and SDS OCS there is a critical point of saturation. The combination of chitosan-SDS-OCS has increased load up to 0.004% and decreased to 0.005% and from this value ha saturation sandstone surface. Particle sizes were determined from the dynamic light scattering technique. Particle sizes confirm that there are chemical interaction of molecules studied on the sandstone particle.