Banca de DEFESA: GREGORY VINICIUS BEZERRA DE OLIVEIRA

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : GREGORY VINICIUS BEZERRA DE OLIVEIRA
DATE: 16/06/2023
TIME: 14:00
LOCAL: Remota (Google Meet)
TITLE:

Steam and Micro/Nanoemulsion Systems Injection for Heavy Oil Recovery in Sandstone Reservoirs

KEY WORDS:

Enhanced Oil Recovery, Microemulsion, Nanoemulsion, Steam, Heavy Oil

PAGES: 168
BIG AREA: Engenharias
AREA: Engenharia Química
SUMMARY:

Oil production in onshore Northeast Brazil fields is in sharp decline, requiring the application of enhanced oil recovery methods to reverse this tendency. For these fields, steam flooding is widely used, however, in advanced stages of injection, it can have a high cost and low efficiency. In this case, the use of chemical methods associated with steam can lead to an increase in oil recovery. In this study, micro (MS) and nanoemulsion (NS) systems, prepared with Ultranex NP 100 (surfactant), n-butanol (cosurfactant), synthetic produced water (aqueous phase), and kerosene (oil phase), were injected associated with steam as a heavy oil recovery method for siliciclastic reservoirs. The systems were characterized in terms of droplet diameter, surface and interfacial tension, rheological behavior and viscosity, besides the effect on the wettability of the sandstone rocks used, Berea sandstone and sandstone from the Brazilian Northeast. In the coreflooding tests, the parameters of surfactant concentration, injection order of the steam and solution banks, injection method (co-injection or alternating injection), injection flow rate and volumetric proportion of the injected fluids were evaluated. All developed solutions showed a reduction in surface and interfacial tension and changed the wettability of the sandstones to water-wet, characteristics desired for use as EOR (Enhanced Oil Recovery) method. The use of a microemulsion solution with 8.66% surfactant in its composition co-injected with steam in the same proportion at a flow rate of 0.125 mL/min showed the best result for oil recovery factor (70.10%) in the Berea sandstone and in the reservoir sandstone (54.34%). The results of this study validated the proposed technique of using an new hybrid recovery method (thermal method associated with the chemical) for heavy oil, which can boost the revitalization of mature fields, ensuring the extension of production and the stimulation of regional development.

COMMITTEE MEMBERS:
Externo à Instituição - ANTONIO ROBSON GURGEL - UFERSA
Externo ao Programa - 1754344 - MARCOS ALLYSON FELIPE RODRIGUES - nullExterno à Instituição - PEDRO TUPÃ PANDAVA AUM - UFPA
Externa à Instituição - TAMYRIS THAISE COSTA DE SOUZA - UNIFESSPA
Presidente - 347057 - TEREZA NEUMA DE CASTRO DANTAS