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Previous issue date: 2015-02-03 / Ag?ncia Nacional do Petr?leo - ANP / Os fluidos de perfura??o t?m import?ncia fundamental nas atividades petrol?feras,
uma vez que, s?o respons?veis por permitir a retirada dos cascalhos provenientes da
perfura??o, a manuten??o da press?o e a estabilidade do po?o, evitando desmoronamentos e
influxo de fluido na forma??o rochosa, al?m da lubrifica??o e resfriamento da broca. Existem
basicamente tr?s tipos de fluidos de perfura??o, s?o eles: de base aquosa, de base n?o aquosa
e aerado. O fluido de perfura??o de base aquosa ? amplamente usado por ser menos agressivo
ao meio ambiente e apresentar excelente estabilidade e inibi??o (em fluidos aquosos inibidos),
entre outras qualidades. A ?gua produzida ? gerada simultaneamente com o petr?leo durante a
produ??o e possui grandes concentra??es de metais e contaminantes, sendo necess?rio trat?-la
para descart?-la. A ?gua produzida dos campos de Urucu-AM e do Riacho da Forquilha-RN
possuem elevadas concentra??es de contaminantes, metais e sais, como de c?lcio e magn?sio,
dificultando o seu tratamento e descarte. Com isso, o objetivo desse trabalho foi analisar o uso
da ?gua produzida sint?tica com caracter?sticas semelhantes ?s ?guas produzidas de UrucuAM
e de Riacho da Forquilha-RN na formula??o de um fluido de perfura??o aquoso,
observando nas ?guas sint?ticas de Urucu-AM e de Riacho da forquilha-RN a influ?ncia da
varia??o da concentra??o de c?lcio e de magn?sio nos testes de reologia e filtrado. Realizouse
um planejamento experimental fatorial simples 32
para modelagem estat?stica dos dados.
Os resultados mostraram que a varia??o das concentra??es de c?lcio e magn?sio n?o
influencia na reologia do fluido, onde a viscosidade pl?stica, viscosidade aparente e os g?is
inicial e final n?o oscilaram significativamente. Para o filtrado, a concentra??o de c?lcio
influenciou de forma linear na concentra??o de cloreto, onde quanto maior a concentra??o de
c?lcio, maior a concentra??o de cloreto no filtrado. Para o volume de filtrado foi observado
nos fluidos formulados com ?gua sint?tica de Urucu-AM que a concentra??o de c?lcio
influencia de forma quadr?tica, isso significa que elevadas concentra??es de c?lcio interferem
no poder de reten??o dos inibidores de filtrado utilizados na formula??o do fluido, j? nos
fluidos formulados a partir de ?gua produzida sint?tica de Riacho da Forquilha-RN, a
concentra??o de c?lcio influencia de forma linear. A concentra??o de magn?sio influenciou
apenas na concentra??o de cloreto de forma quadr?tica nos fluidos formulados a partir da
?gua sint?tica de Urucu-AM. O fluido com concentra??o m?xima de magn?sio (9,411g/L), e
concentra??o m?nima de c?lcio (0,733g/L) apresentou bons resultados. Portanto, uma ?gua
produzida com concentra??o m?xima de magn?sio de 9,411g/L e m?xima de c?lcio de
0,733g/L pode ser utilizada para formula??o de fluidos de perfura??o de base aquosa,
conferindo propriedades adequadas a esse tipo de fluido. / Drilling fluids have fundamental importance in the petroleum activities, since
they are responsible for remove the cuttings, maintain pressure and well stability, preventing
collapse and inflow of fluid into the rock formation and maintain lubrication and cooling the
drill. There are basically three types of drilling fluids: water-based, non-aqueous and aerated
based. The water-based drilling fluid is widely used because it is less aggressive to the
environment and provide excellent stability and inhibition (when the water based drilling fluid
is a inhibition fluid), among other qualities. Produced water is generated simultaneously with
oil during production and has high concentrations of metals and contaminants, so it?s
necessary to treat for disposal this water. The produced water from the fields of Urucu-AM
and Riacho da forquilha-RN have high concentrations of contaminants, metals and salts such
as calcium and magnesium, complicating their treatment and disposal. Thus, the objective was
to analyze the use of synthetic produced water with similar characteristics of produced water
from Urucu-AM and Riacho da Forquilha-RN for formulate a water-based drilling mud,
noting the influence of varying the concentration of calcium and magnesium into filtered and
rheology tests. We conducted a simple 32
factorial experimental design for statistical
modeling of data. The results showed that the varying concentrations of calcium and
magnesium did not influence the rheology of the fluid, where in the plastic viscosity, apparent
viscosity and the initial and final gels does not varied significantly. For the filtrate tests,
calcium concentration in a linear fashion influenced chloride concentration, where when we
have a higher concentration of calcium we have a higher the concentration of chloride in the
filtrate. For the Urucu?s produced water based fluids, volume of filtrate was observed that the
calcium concentration influences quadratically, this means that high calcium concentrations
interfere with the power of the inhibitors used in the formulation of the filtered fluid. For
Riacho?s produced water based fluid, Calcium?s influences is linear for volume of filtrate. The
magnesium concentration was significant only for chloride concentration in a quadratic way
just for Urucu?s produced water based fluids. The mud with maximum concentration of
magnesium (9,411g/L), but minimal concentration of calcium (0,733g/L) showed good
results. Therefore, a maximum water produced by magnesium concentration of 9,411g/L and
the maximum calcium concentration of 0,733g/L can be used for formulating water-based
drilling fluids, providing appropriate properties for this kind of fluid.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/19778 |
| Date | 03 February 2015 |
| Creators | Ribeiro, La?s Sibaldo |
| Contributors | 07286937391, http://lattes.cnpq.br/0676872399141537, Dantas Neto, Afonso Avelino, 05641284491, http://lattes.cnpq.br/2174051551046465, Melo, Klismeryane Costa de, 03444622422, http://lattes.cnpq.br/4874791052449347, Santanna, Vanessa Cristina, 77938780430, http://lattes.cnpq.br/9445575768909084, Dantas, Tereza Neuma de Castro |
| Publisher | Universidade Federal do Rio Grande do Norte, P?S-GRADUA??O EM ENGENHARIA QU?MICA, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | Portuguese |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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