Estudo da incorporação de resíduos de perfuração para aplicação em cimentação de poços de petróleo
During the drilling of oil and natural gas are generated solid waste, liquid and gaseous. These solid fragments, which are known as cuttings, are carried to the surface through the drilling fluid. Furthermore, this fluid serves to cool the bit, keeping the internal pressure of the well, and other...
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| Formato: | Dissertação |
| Idioma: | por |
| Publicado em: |
Universidade Federal do Rio Grande do Norte
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| Endereço do item: | https://repositorio.ufrn.br/jspui/handle/123456789/19675 |
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| Resumo: | During the drilling of oil and natural gas are generated solid waste, liquid and
gaseous. These solid fragments, which are known as cuttings, are carried to the
surface through the drilling fluid. Furthermore, this fluid serves to cool the bit,
keeping the internal pressure of the well, and others. This solid residue is very
polluting, because it has incorporated beyond the drilling fluid, which has
several chemical additives harmful to the environment, some heavy metals that
are harmful to the environment, such as lead. To minimize the residue
generated, are currently being studied numerous techniques to mitigate the
problems that such waste can cause to the environment, like addition of cuttings
in the composition of soil cement brick masonry construction, addition of
cuttings on the clay matrix for the manufacture of solid masonry bricks and
ceramic blocks and coprocessing of the cuttings in cement. So, the main
objective of this work is the incorporation of cuttings drilling of oil wells, the
cement slurry used in the cementing operation of the well. This cuttings used in
this study, arising from the formation Pendências, was milled and separated in a
sieve of 100 mesh. After grinding had a mean particle sike in order of 86 mm
and crystal structure containing phases of quartz and calcite type, characteristic
of the Portland cement. Were formulated and prepared slurries of cement with
density 13 lb / gal, containing different concentrations of gravel, and realized
characterization tests API SPEC 10A and RP 10B. Free water tests showed
values lower than 5.9% and the rheological model that best described the
behavior of the mixtures was the power. The results of compressive strength
(10.3 MPa) and stability (Dr <0.5 lb / gal) had values within the set of
operational procedures. Thus, the gravel from the drilling operation, may be
used as binders in addition to Portland cement oil wells, in order to reuse this
waste and reduce the cost of the cement paste. |
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