CARLOS HENRIQUE DE MESQUITA

CARLOS HENRIQUE DE MESQUITA

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Zonal refining and Bridgman technique for CsI:Tl scintillation crystal growth
2021 - SUZART, K.F.; PEREIRA, M.C.C.; HAMADA, M.M.; MESQUITA, C.H.
Chemical and physical analysis of sandstone rock from Botucatu formation
2019 - CORREA, JOAO C.; GARCIA, RAFAEL H.L.; SANTOS, RODRIGO S. dos; AMADEU, RAFAEL A.; BERNARDES, THIAGO L.S.; VELO, ALEXANDRE F.; CARVALHO, DIEGO V. de S.; NASCIMENTO, TARCIANO J. do; CAVALLARO, FRANCISCO A.; MESQUITA, CARLOS H. de; HAMADA, MARGARIDA M.
The productive capacity of the Guarani Aquifer System is subject to variations along its length, due to its complex structural and compositional heterogeneity. Several parameters may influence the quality of this reservoir rock, such as its mineralogical and textural constitution, as well as the physicochemical processes, its diagenesis is not the same throughout the aquifer, influencing the water productivity in wells in different locations. Such parameters are useful in the geoscience studies, in the elaboration of diagenetic models for the prediction of the reservoir quality. In this work, several properties of the sandstone rock from Botucatu Formation were determined, using different techniques, such as geotechnical tests, optical microscopy (MO), electron scanning microscopy (SEM), X-ray Fluorescence and X-ray diffraction. The results indicate that the studied sandstones have characteristics of the reservoir rocks, with potential for water storage.
Performance of the X-ray powder diffraction (XRD), X-ray fluorescence (XRF) and the industrial computed tomography used for characterization of the vesicular volcanic rock
2019 - 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.
Characterization of the petrology of the tar sandtone rock of the Paraná basin
2019 - 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.
Study of the petrology of the shale rock from the Parana basin
2019 - 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.
Development and characterization of CsI (Tl) crystal for use as a radiation detector
2019 - SUZART, KAROLINE F.; HAMADA, MARGARIDA M.; PEREIRA, MARIA da C.C.; MESQUITA, CARLOS H. de
Cesium iodide crystal activated with thallium (CsI(Tl)) is used as radiation sensor because of its favorable characteristics as scintillator when excited by gamma radiation. This crystal has good mechanical strength and it is not hygroscopic. In the present work the CsI(Tl) crystal was growed in the Nuclear Energy Research Institute (IPEN/CNEN/SP) by Brigdman technique in different sizes. The scintillator response was studied through gamma radiation from 99mTc source with the energy of 140 keV. The crystals were coupled to a photomultiplier tube using 0.5 McStokes viscosity silicone grease as the optical interface. All electronics for signal measurements were developed at IPEN. Measurements of luminescence and gamma spectrometry of a 99mTc source were performed. The energy resolution of the crystals was determined by the spectrum photopeak considering its full width at half maximum (FWHM).
Development of an automated source port in IoT for application in industrial process tomography
2019 - CARVALHO, DIEGO V. de S.; GREGIANIN, GUSTAVO M.; MESQUITA, CARLOS H. de
Computed tomography technology uses an electromagnetic radiation source or particulate radiation source, to analyze / study different samples that can range from living organisms to the most diverse objects (rocks, phantoms, etc.). The use of the radioactive materials may cause harm to the operator if he is exposed to the source of radiation, so aiming at the safety of the operator, the objective of this work is to develop an Internet of Things automation system for the opening of the Industrial Process Tomography source port for industrial tomography applications. Thus, this system can drive the stepper motors through this platform can be opened at a safe distance to the operator, avoiding the operator to take radiation dose to perform this operation. For the IPT project, five source ports were made so that each was positioned diametrically opposite each array of detectors. In this project we used 192Ir sources that have activity of 18,500 MBq and that were produced in the reactor IEA-R1, from the neutron bombardment of the pellet containing stable isotope 191Ir. The main characteristics of 192Ir are: half-life of 74.2 days; radiation energy from 0.13 to 0.65 MeV. For the safety of the operator during the opening of the sources, an automated opening system with IoT that can be activated with software installed on the tomography or by a smartphone application by the MQTT protocol, which makes it possible to be monitored in real time at long distance showing the opening and closing status of each source port.
Gamma computed tomography performance for petrophysical characterization of sandstone rocks
2018 - VELO, A.F.; CAVALLARO, F.A.; AMADEU, R. de A.; SANTOS, R.S. dos; MARTINS, J.F.T.; CARVALHO, D.V.S.; MESQUITA, C.H. de; HAMADA, M.M.
The gamma ray tomography techniques for industrial processes evaluation have been pointed out as the most promising in order to visualize the structure and the distribution of solids, liquids and gases inside multiphase systems, such as industrial columns or pipes, without interrupting the operation in pharmaceutical, biochemical, petrochemical and chemical industries. The reservoir rocks of fluids have, also, multiphase mixtures in their interior, since the fluids stored in the pore spaces within the reservoir rocks could be gas, oil, and water. However, no studies related to gamma tomography for analysis of oil reservoir rocks have been found in the literature. One type of rock of economic interest is the tar sand rock which has a great potential to act as reservoirs of oil, thus the knowledge of its petro-physical properties related to the filling of fluids in their pores; its structural properties, its internal geometry can contribute significantly to the exploration and recovery of the hydrocarbons of the rocks reservoirs, providing subsidies to the oil engineers in the recovery of hydrocarbons (oil) in their interior, having a significant economic relevance. In this work, the tar sand rock was characterized using the 3th generation gamma-ray industrial process tomography technique developed at IPEN /CNEN-SP. The internal arrangement, distribution of the pores, mineral composition, the fluid and mineral densities of the analysed rocks were evaluated. A high spatial resolution was obtained in the reconstructed image.
Development of gamma industrial process computerized tomography for multiphase systems analysis in Brazil
2018 - HAMADA, MARGARIDA M.; MESQUITA, CARLOS H. de
A new industrial tomography system combining simultaneously the emission and transmission tomography systems
2018 - MESQUITA, C.H.; VELO, A.F.; CALVO, W.A.; CARVALHO, D.V.; HAMADA, M.M.
The tomographic techniques can be used in many industries to explore the interior of their objects, for example, (a) to act as the quality control of industrialized products or (b) to diagnose and identify failure in their production devices. Commonly, the industrial objects are chemical reactors, packaging of foods, encapsulated medicaments, columns of petroleum distillation, combustion engines, among other industrial objects. A portable tomography system known as instant-non-scanning type, a similar version of the fourth generation CT, was developed in this work. It comprises 70 NaI(Tl) detectors with the same number of multichannel type acquisition boards.One of the advantages of industrial tomography is that it allows inferring the quality of the production line without interrupting the production. The tomographic system described in this work is capable to obtain measurements in real time and requires no movement of radiation sources and detectors. The tomographic system, proposed in this work, allows the introduction of a radioactive tracer inside the industrial object, for example a tube or chemical reactor and then the user will obtain the reconstruction images of a tomographic emission system together to the transmission image. By means of radioactive sources positioned externally to the object the user will obtain the reconstructed images of the transmission tomographic system. Therefore, this article describes an innovative hybrid industrial tomographic system, capable of generating both emission and transmission tomographic images simultaneously.