masterThesis
Análise paramétrica da injeção de vapor e solvente com poços horizontais em óleos de diferentes viscosidades
Fecha
2019-02-05Registro en:
SILVA, Daniel Soares da. Análise paramétrica da injeção de vapor e solvente com poços horizontais em óleos de diferentes viscosidades. 2019. 96f. Dissertação (Mestrado em Ciência e Engenharia de Petróleo) - Centro de Ciências Exatas e da Terra, Universidade Federal do Rio Grande do Norte, Natal, 2019.
Autor
Silva, Daniel Soares da
Resumen
The high existence of reservoirs containing heavy oil is a reality in Brazil and in the world.
Heavy oil reservoirs have production difficulties, which are mainly associated with the high
viscosity of the present oil, causing low production through conventional recovery methods.
The application of thermal methods alone as well as in conjunction with miscible methods,
such as solvent injection can contribute to the production, since the increase in temperature
promotes the viscosity reduction and solvent helps in the miscibility by reducing the
interfacial tension between oil and solvent. This study had as objective to apply the steam
injection process, initially alternating with solvent, in a homogeneous reservoir model with
main characteristics of the reservoirs of the Brazilian Northeast region, in three oils with
different viscosities. Some operational parameters were analyzed, such as: steam injection
flow, solvent injection flow, vertical distance between the horizontal wells and time of
alternation between steam and solvent, after, it was analyzed the same case, fixing the
highest injected steam flow and the highest solvent injection flow in the continuous mode,
the possibility of injecting solvent only at the start of production was also analyzed.
Numerical simulations were performed using the STARS thermal simulator from CMG
(Computer Modelling Group). The results showed the importance of the vertical distance
between the wells and the steam injection flow, it was also observed that the higher the
viscosity of the oil, the lower the influence of the alternating solvent injection in time,
showing that the solvent has a higher solubility with the lighter oil that was studied.