Estudo da recuperação avançada de petróleo através da injeção do biossurfactante ramnolipídeo produzido a partir de pseudomonas aeruginosa
The continuous need for increased production of hydrocarbons makes the development of techniques to produce more oil from reservoirs a matter of fundamental importance. In that context, the enhanced oil recovery (EOR) through surfactant flooding works by lowering the interfacial tension between w...
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| פורמט: | Dissertação |
| שפה: | por |
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Brasil
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| גישה מקוונת: | https://repositorio.ufrn.br/jspui/handle/123456789/25498 |
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| סיכום: | The continuous need for increased production of hydrocarbons makes the development of
techniques to produce more oil from reservoirs a matter of fundamental importance. In that
context, the enhanced oil recovery (EOR) through surfactant flooding works by lowering the
interfacial tension between water and oil, improving the displacement of the latter out of the
reservoir. The present work aims to characterize the rhamnolipid biosurfactant, produced from
a strain of the Pseudomonas aeruginosa bacteria, and to assess its utilization in the EOR
process, using synthetic sandstone as reservoir rocks. The rhamnolipid characterization
involved the determination of its critical micelle concentration (c.m.c.), and also the behaviour
caused by the influence of pH and salinity over it. The EOR process included three oil samples,
with API degree range of 25-30, and three biosurfactant concentrations, of 30, 50 and 100%
above the cmc. The results demonstrated that biosurfactant flooding not only presents itself as
a sustainable alternative to synthetic surfactants by being biodegradable, but is also capable of
increasing the recovery factor of the oil production process post water injection, presenting a
range of enhanced recovery factors from 1.6 up to 9.3%, displaying better results when heavier,
more viscous oil samples are used and for higher rhamnolipid concentrarions. |
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