Adição de resíduo cerâmico em pastas geopoliméricas para cimentação de poços de petróleo
The development of activities the of oil and gas sector have promoted the search for suitable materials for cementing oil wells. In the state of the Rio Grande do Norte, the integrity of the cement sheath tends to be impaired during steam injection, a procedure necessary to increase oil recovery...
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| Format: | doctoralThesis |
| Idioma: | por |
| Publicat: |
Universidade Federal do Rio Grande do Norte
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| Accés en línia: | https://repositorio.ufrn.br/jspui/handle/123456789/12790 |
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| Sumari: | The development of activities the of oil and gas sector have promoted the search for
suitable materials for cementing oil wells. In the state of the Rio Grande do Norte, the
integrity of the cement sheath tends to be impaired during steam injection, a
procedure necessary to increase oil recovery in reservoirs with low-viscosity oil. The
geopolymer is a material that can be used as alternative cement, since it has been
used in the production of fire-resistant components, building structures, and for the
control of toxic or radioactive residues. Geopolymers result from condensation
polymer alkali aluminosilicates and silicates resulting three-dimensional polymeric
structures. They are produced in a manner different from that of Portland cement,
which is made an activating solution that is mixed with geopolymer precursor. Among
the few works studied allowed us to conclude that the pastes prepared with
metakaolin as precursor showed better performance of its properties. Several studies
show the addition of waste clay as a means of reducing cost and improving end of
the folder properties. On this basis, the goal is to study the influence of the addition of
ceramic waste in geopolymer paste. To develop the study of rheology tests were
carried out, filtered, thickening time, compressive strength, free water, specific gravity
and permeability, according to the American Pretoleum Institute (API). The results for
all formulations studied show that the folders have high mechanical strength to a light
paste; low filtrate volume, absence of free water, very low permeability, slurry,
consistent with a light paste, and thickening time low that can be corrected with the
use of a retardant handle. For morphological characterization, microstructural,
physical, chemical and thermal tests were carried out by XRD, MEV, DTA, TG, FTIR.
In the trial of XRD, it was found that geopolymer is an amorphous material, with a
peak of crystalline kaolinite. In tests of TG / DTA, revealed the presence of a
significant event, which represents the mass loss related to water, and also observed
the reduction of weight loss by increasing the concentration of ceramic waste. In the
trial of MEV, we found a uniform matrix without the presence of other phases. In the
trial of FT-IR, we observed the presence of the band related to water. From all results
it was determined that the optimum concentration range of use is between 2.5 and
5% of waste ceramic |
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