Banca de DEFESA: HELTON GOMES ALVES

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : HELTON GOMES ALVES
DATE: 30/08/2021
TIME: 14:30
LOCAL: On line
TITLE:

Influence of polymer concentration in microemulsified systems containing Alkali-Surfactant-Polymer known in sandstone rocks

KEY WORDS:

Surfactant, Polymer, Adsorption, Alkali, EOR, Sandstone.

PAGES: 110
BIG AREA: Engenharias
AREA: Engenharia Química
SUBÁREA: Processos Industriais de Engenharia Química
SPECIALTY: Processos Orgânicos
SUMMARY:

The Enhaced Oil Recovery (EOR) process using chemical methods, among them, Chemical systems containing Alkali, Surfactant, and Polymer (ASP), has been widely investigated, due to the good synergy between the three chemical agents and for presenting a 20% increase in the percentage of recovered oil in place. In this context, the present work aims at the experimental study of chemical systems, consisting of saponified coconut oil (surfactant), Butan-1-ol (co-surfactant), kerosene (oil phase), Na₂CO₃ (Alkali), water and different percentages of polymer AH 912 SH, applied as an alternative method in EOR in sandstone rock from the Botucatu sedimentary formation. Chemical systems were characterized by analysis of particle diameter, surface tension and viscosity. Rheology and adsorption tests were carried out in order to evaluate their influence on oil recovery. The flow tests in porous media were carried out in a confinement system that simulates the conditions of an oil reservoir, using sandstone rock plugs with permeability in the range of 15.70 mD to 27.66 mD and oil from the Potiguar Basin of the Ubarana field. The droplet sizes showed characteristic values of micellar aggregates, with a maximum dimension of 2.63 nm. Surface tension increased as the percentage of polymer in the systems increased. Advanced recovery tests using chemical systems showed oil displacement efficiencies with values directly proportional to the increase in viscosity of ASP chemical systems. The system with the highest percentage of polymer obtained the best percentage of oil displaced (79.12%), resulting in greater total displacement efficiency (96.07%). It was also observed that it is possible to obtain satisfactory recovery results by injecting smaller volumes of the system, followed by brine injection. This study showed the potential of ASP microemulsion chemical systems in oil recovery.

 

 

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Externo à Instituição - CLÁUDIO REGIS DOS SANTOS LUCAS - UFPA
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