Banca de DEFESA: MARCOS MIRANDA SILVA SOUZA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : MARCOS MIRANDA SILVA SOUZA
DATA : 29/04/2019
HORA: 09:00
LOCAL: Sala de Reunião José Lourenço Costa
TÍTULO:

PRECIPITATION OF ASPHALTENES IN PETROLEUM RESERVOIRS BY CO2 INJECTION AND DEPLOYMENT: MODELING AND SIMULATION OF HIGH PRESSURE PHASE BALANCE.

PALAVRAS-CHAVES:

Asphaltene precipitation, CO2 injection, depletion, phase envelope, SRK equation of state, Hirschberg’s model.

PÁGINAS: 108
GRANDE ÁREA: Engenharias
ÁREA: Engenharia de Produção
RESUMO:

The multiple contact miscible floods involving CO2 injection into reservoirs represent one of the most efficient enhanced oil recovery (EOR) processes widely used in mature fields and currently of great interest in Brazilian pre-salt reservoirs. Due to the high levels of CO2, which for environmental reasons cannot be released to the atmosphere, the main solution in pre-salt is its reinjection into the well. In addition to increase the oil recovery, the reinjection allows trapping the gas confined in the reservoir. However, CO2 injection and depletion may induce precipitation of asphaltenes, the heaviest and most complex fraction of the oil, causing its gradual deposition in the reservoir and facilities, which can stop the oil production and transportation, with significant economic losses. Therefore, predicting the asphaltene onset precipitation and the amount precipitated under CO2 injection or depletion is a scientific and technological challenge. This dissertation contributes to a better understanding of the main aspects of modeling asphaltene precipitation to accurately calculate the onset of precipitation and the amount of asphaltene precipitated, under reservoir conditions and with few experimental data. The effect of different characterizations methods for the residual oil fraction on the calculation of the asphaltene onset precipitation and the amount precipitated is critically evaluated as a function of the CO2 molar fraction by using the Hirschberg model. In addition, a new method is proposed to determine the asphaltene onset precipitation based on modeling and simulation of the density of the mixture oil-CO2 using the Hirschberg model and the SRK equation of state. Also, the asphaltene precipitation envelope is simulated using the Hirschberg model from a limited amount of experimental data. The results indicate the success of both models in correlating the available experimental data, but their predictive capabilities were not enough explored, because it would require a larger amount of experimental data. The experimental determination of the asphaltene onset pressure (AOP) for different conditions of CO2 injections would also allow the construction and simulation of more complete and comprehensive Asphaltenes Precipitation Envelopes.

MEMBROS DA BANCA:
Interno - 2199115 - CRISTIANO HORA DE OLIVEIRA FONTES
Externo à Instituição - FABIO PEDRO DO NASCIMENTO
Externo à Instituição - FREDERICO WANDERLEY TAVARES
Presidente - 112.573.775-15 - GLORIA MEYBERG NUNES COSTA - UFBA
Externo à Instituição - ROGERIO FERNANDES DE LACERDA