CARLOS HENRIQUE DE MESQUITA
27 resultados
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Artigo IPEN-doc 27904 Performance of the X-ray powder diffraction (XRD), X-ray fluorescence (XRF) and the industrial computed tomography used for characterization of the vesicular volcanic rock2021 - SANTOS, R.S.; CAVALLARO, F.A.; BERNARDES, T.L.S.; AMADEU, R.A.; GARCIA, R.H.L.; VELO, A.F.; MESQUITA, C.H.; HAMADA, M.M.Volcanic rock is a designation in geology given to extrusive igneous rocks. One type of igneous rock of interest, in economic terms, is vesicular, since, besides the knowledge of the morphology (positioning, size, direction, and interconnectivity of the vesicles) of these structures within the spill, there is also an economic interest regarding the possibility of this rock as a reservoir of fluids (water and hydrocarbons). In this work, samples of vesicular volcanic rock from the Paraná Basin were studied for their characterization, aiming to contribute to the knowledge of this rock proprieties as a reservoir of fluids. The elements present inside the rocks were identified and quantified by X ray fluorescence and X ray diffraction. The dimensions of the vesicles and the interconnection between them could be clearly observed in the reconstructed images of the rocks measured by the third generation Gamma ray industrial tomography techniqueArtigo IPEN-doc 27895 Petrological study of the Iraty Formation Shale Rocks from Paraná Basin, Limeira, São Paulo2021 - BERNARDES, T.L.S.; AMADEU, R.A.; SANTOS, R.S.; GARCIA, R.H.L.; VELO, A.F.; CAVALLARO, F.A.; MESQUITA, C.H.; HAMADA, M.M.Shales are fine-grained rocks formed by clays and silt-sized particles in thin, relatively impermeable layers. They are originated from rocks that suffered weathering and erosion and their composition is quite variable. When oil production declines, interest arises to improve the understanding of the physicochemical properties of unconventional rocks, like shale. For the characterization of the shale samples of the Iraty Formation, the gamma-ray computed industrial tomography technique has been proposed to be used as an alternative to obtaining information about each element present in the mineral, the pore distribution, through the shale morphology. The tomographic results were compared with those obtained by conventional methodologies used in the petrological analysis, such as scanning electron microscopy (SEM), x-ray fluorescence, and x-ray diffraction.Artigo IPEN-doc 26221 Performance of the X-ray powder diffraction (XRD), X-ray fluorescence (XRF) and the industrial computed tomography used for characterization of the vesicular volcanic rock2019 - SANTOS, RODRIGO S. dos; CAVALLARO, FRANCISCO DE A.; BERNARDES, THIAGO L.S.; AMADEU, RAFAEL A.; GARCIA, RAFAEL H.L.; VELO, ALEXANDRE F.; CARVALHO, DIEGO V. de S.; MESQUITA, CARLOS H. de; HAMADA, MARGARIDA M.Volcanic rock is a designation in geology given to extrusive igneous rocks. One type of igneous rock of interest, in economic terms, is the vesicular, since besides the knowledge of the morphology (positioning, size, direction and interconnectivity of the vesicles) of these structures within the spill, there is also an economic interest regarding the possibility of this rock as a reservoir of fluids (water and hydrocarbons). In this work, samples of vesicular volcanic rock from the Paraná Basin were studied for their characterization, aiming to contribute in the knowledge of this rock proprieties as a reservoir of fluids. The elements present inside the rocks were identified and quantified by X-ray fluorescence and X-ray diffraction. The dimensions of the vesicles and the interconnection between them could be clearly observed in the reconstructed images of the rocks measured, using the third generation gamma ray industrial tomography.Artigo IPEN-doc 26220 Characterization of the petrology of the tar sandtone rock of the Paraná basin2019 - AMADEU, RAFAEL A.; BERNARDES, THIAGO L.S.; SANTOS, RODRIGO S. dos; GARCIA, RAFAEL H.L.; VELO, ALEXANDRE F.; CARVALHO, DIEGO V. de S.; CAVALLARO, FRANCISCO A.; MESQUITA, CARLOS H. de; HAMADA, MARGARIDA M.In the state of São Paulo (Brazil), occurrences of tar sandstone are known in Botucatu, Angatuba, Pirambóia, Anhembi and Bofete municipalities. In the present work, a sample of white tar sandstone was taken from Anhembi municipality, located at Km 168 of the Castelo Branco Highway. In the petroleum area, sandstones act as excellent hydrocarbon reservoirs, since they have specific characteristics, such as: high porosity and permeability. Porosity is a property of rocks, and it may be understood as the voids contained in the matrix (where fluids remain stored), while permeability is the ability of the rock to transmit these stored fluids. Due to these characteristics of sandstones, researchers have shown a growing interest in the study and characterization of this type of rock, which is a fundamental element of an oil system. In the present work, four characterization techniques were used in the Anhembi tar sandstone sample, namely: X-ray Diffraction, X-ray Fluorescence, Scanning Electron Microscope and the third generation Industrial Computerized Tomography. Through these techniques, the chemical composition, grain morphology, crystalline structure phases and an image of a slice of the internal structure of the white tar sandstone sample were obtained.Artigo IPEN-doc 26219 Study of the petrology of the shale rock from the Parana basin2019 - BERNARDES, THIAGO L.S.; AMADEU, RAFAEL A.; SANTOS, RODRIGO S. dos; GARCIA, RAFAEL H.L.; VELO, ALEXANDRE F.; CARVALHO, DIEGO V. de S.; CAVALLARO, FRANCISCO A.; MESQUITA, CARLOS H. de; HAMADA, MARGARIDA M.In the present work, the characteristics of shale rock, collected in the surrounds of Limeira, in the interior of São Paulo, were studied. Shales are rocks formed by the consolidation of layers of clay, silt or mud, and are composed of minerals derived from mechanical abrasion materials, weathering final product and chemical and/or biochemical additions [1]. Shales are mostly fine granules, susceptible to the mineralogical rearrangement, and their chemical composition is quite varied due to the geomorphology and the tectonism undergone by the sedimentary basins. They are impermeable structures, formed by the consolidation of layered clay with thin laminations. Because of these characteristics presented, together with the decline of petroleum production, a growing interest in the better understanding and knowledge of the physical-chemical properties of the interior of shale rocks has been demonstrated. In this work, different methodologies were used to characterize them, using the Gamma Ray Computed Industrial Tomography technique along with other complementary procedures, such as Scanning Electron Microscopy (SEM), X-Ray Fluorescence and X-Ray Diffraction. Several characteristics have been studied, such as the analysis of the particle morphology, the contrasts and distributions of these particles in the internal structure of the rock, identification of the types of elements present (quantitative analysis), as well as establishing a proportion in which each element is present in the mineral through its crystalline structure and obtaining images of the rock internal structure.Artigo IPEN-doc 23998 Influence of impurities on the radiation response of the TlBr semiconductor crystal2017 - SANTOS, ROBINSON A. dos; MESQUITA, CARLOS H. de; SILVA, JULIO B.R. da; FERRAZ, CAUE de M.; COSTA, FABIO E. da; MARTINS, JOAO F.T.; GENNARI, ROSELI F.; HAMADA, MARGARIDA M.Two commercially available TlBr salts were used as the rawmaterial for crystal growths to be used as radiation detectors. Previously, TlBr salts were purified once, twice, and three times by the repeated Bridgmanmethod. Thepurification efficiency was evaluated by inductively coupled plasma mass spectroscopy (ICP-MS), after each purification process. A compartmental model was proposed to fit the impurity concentration as a function of the repetition number of the Bridgman growths, as well as determine the segregation coefficients of impurities in the crystals. The crystalline structure, the stoichiometry, and the surface morphology of the crystals were evaluated, systematically, for the crystals grown with different purification numbers. To evaluate the crystal as a radiation semiconductor detector, measurements of its resistivity and gamma-ray spectroscopy were carried out, using 241Am and 133Ba sources. A significant improvement of the radiation response was observed in function of the crystal purity.Resumo IPEN-doc 22255 Caracterização do sistema tomográfico computadorizado industrial para raios gama2008 - PEREIRA, JOAO C.S. de M.; MESQUITA, CARLOS H.; HAMADA, MARGARIDA M.Resumo IPEN-doc 22121 Caracterização do sistema tomográfico computadorizado industrial para raios gama2007 - PEREIRA, JOAO C.S. de M.; MESQUITA, CARLOS H.; HAMADA, MARGARIDA M.Artigo IPEN-doc 21293 Industrial tomography using three different gamma ray2016 - MESQUITA, C.H. DE; VELO, A.F.; CARVALHO, D.V.S.; MARTINS, JOAO F.T.; HAMADA, M.M.Resumo IPEN-doc 08545 Plastic scintillator detection efficiency for beta and gamma radiations in function of the detector thickness2002 - MADI FILHO, T.; MESQUITA, C.H.
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