997 resultados para Processo Tipo Fenton
Resumo:
Esta dissertao relata o desenvolvimento de um produto para determinao do tipo san-guneo de humanos. A necessidade de criar um produto eficiente e capaz de determinar o tipo sanguneo em situaes de emergncias surge da possibilidade das anlises serem realizadas em momentos crticos, onde se pretende eliminar o erro humano e minimizar os riscos de incompatibi-lidade nas transfuses sanguneas. A proposta pretende resolver problemas dos procedimentos realizados na anlise do tipo sanguneo em situaes de emergncia, que so realizados pelos tcnicos da sade, em ambien-tes da sade, fixos ou mveis. Atualmente, o processo de anlise de grupo sanguneo, nestas si-tuaes, ocorre manualmente atravs do procedimento de teste em lmina. Este consiste na reco-lha de sangue e respectiva mistura com os reagentes especficos, a fim de determinar a aglutina-o do sangue. Os resultados so observados macroscopicamente. Com base na tcnica da tipagem manual, desenvolveu-se um produto com os mesmos princpios, semiautomtico e com um rpido tempo de resposta, sem interferncia humana na in-terpretao dos resultados, eliminando possveis erros. Para solucionar os aspetos tcnicos e me-cnicos, incorporaram-se tecnologias inovadoras, sendo elas resultado do trabalho interdisciplinar com das reas do Design Industrial e as Engenharias Eletrnica e Mecnica. O sistema eletrnico incorporado utiliza o sistema de controlo Lilliput. Este sistema processa a informao recorrendo a processamento de imagem (atravs do software LabVIEW) e deteta automaticamente a ocorrncia de aglutinao. O tipo sanguneo assim determinado num curto intervalo de tempo (aproxima-damente, dois minutos), o que viabiliza a utilizao da tcnica em situaes de emergncias. O projeto mecnico do sistema foi desenvolvido com recurso ao software Solidworks. Fo-ram realizadas simulaes e testes com um rotary motor para viabilizar o funcionamento do meca-nismo. O sistema mecnico de agitao das amostras simples, inovador e possui um elevado valor acrescentado, sendo nesse caso uma mais-valia na segurana dos utilizadores. O produto desenvolvido consegue atingir o objetivo do trabalho, realizando a determinao do tipo sanguneo dos humanos em 5 minutos, sendo eficaz e funcional. um produto com aspec-to formal que atribui a sua ergonomia adaptada ao utilizador, sendo assim porttil, de fcil uso e manuseio.
Resumo:
Environmental liabilities from accidents in the retail petroleum industry, especially in urban areas, have represented a serious problem whose impact reaches the underground, people's health and even economic losses with the remediation process. In U.S.A. are estimated hundreds of billions of dollars invested in soil remediation processes. The results of the reports and investigative reports of liabilities in fuel stations distributed in the urban area of Natal-RN were used to estimate the local scenario of contamination. This database has been possible to determine the main contaminants (BTEX, PAHs, TOC), affected neighborhoods and types of potentially more impacted soils. Experiments were carried out in order to reverse contamination of this scenario, where the soil type was a factor in the planning, because it influences directly on the effectiveness of remediation techniques studied: Oxidation by hydrogen peroxide and oxidation by sodium persulphate. These oxidants are activated forming free radicals (HO-, SO4 -, HO2 , O2 -, S2O8 -2, etc) responsible for to mineralize the hydrocarbons and other organic compounds (releasing O2 e CO2). In the activation process, the ferrous ions (II) and ferric (III) were studied as well as hydrogen peroxide activation technique with sodium persulfate, the latter being presented the best efficiency among all the study, when activated with Fe+3. In addition to defining the most efficient technique, the aim of this study was to evaluate the influence of different soils among oxidative techniques, characterizing the effect of the concentration of these oxidants and also the concentration of the catalysts. Exists in most scenarios evaluated the presence of intrinsic total iron soil matrix. The so-called latosols present microaggregates reddish indicating the presence of these reactive species like iron and clayey aspect. The kinetic study was conducted by experimental design and monitoring of the percentage of total carbon (SSM-5000A) in the solid and liquid phases, knowing that 82.4% of the diesel molecule is carbon. Yet organic carbon and pH of liquid samples were analyzed for technical, characterizing the influence of soil type and its operating condition. The Fenton-like technique H2O2 e Fe+2 presented satisfactory oxidation, including sandy soil, but well below the best result. The sodium persulphate only activated with temperature, even in the most favorable soil, did not provide good efficiency. The best technique in the study had the concentration profile with 2,2x10- 1mol.L-1 of Na2S2O8 activated with 6,53x10-1mol.L-1 of H2O2 and 2,5x10-2 Fe3+mol.L-1 which reduced in less than a day 96 contamination in red soil, initially with 66,667 mg of diesel per kg of clean soil
Resumo:
The objective was to understand the process of caring for a center for cancer treatment from the perspective of nurses and patients. This is a qualitative research, xploratory and descriptive, performed in a cancer treatment center in Natal / RN / Brazil. Data collection occurred between August 2013 and February 2014, being effected by means of two techniques: photographic record and projective interviews with nurses and patients. Social actors included in the study were ten professional nursing and ten patients admitted to the surgical department of the institution. The criteria used for inclusion of professionals were: be professional in the field of nursing, being an employee of the hospital, to be inserted in the scale of nurses of the institution at the time of data collection. For the patients were included who had preserved their cognitive abilities and who were hospitalized and at any stage of treatment. We used content analysis proposed by Bardin, for the analysis of material collected during projective interview. The research followed the ethical and legal principles that govern scientific research on human beings, being conducted by the project approval by the Research Ethics Committee of the Northern League Against Cancer Riograndense with 295 673 and look CAAE 16104313.0.0000.5293. Referring to nurses, they demonstrated different views about care, which sprouted from a holistic, multidisciplinary approach and welcoming, as well as linked to the performance of procedures and compliance with the requirements technicality. Furthermore, these subjects also showed that care unfolds through the actions of management in carrying out the records in the humanization of care by meeting the needs of the patient and ambience. Front of patients, it is noteworthy that, for them, care happens through attitudes of caring and professional approach, and by performing procedures, being mentioned as a careless lack of structure of the institution and the discomfort caused by this condition factors. It was evident also that the actors involved in the care, the perception of professionals and patients, are represented by nurses, doctors, psychologists, nutritionists, as well as kitchen assistants and cleaners; beyond family companion, the individual himself as responsible for their care and volunteer caregiver. In this opportunity, it is concluded 9 that an understanding of care from the perspective of nurses and patients involves broad issues ranging from perceptions of care that embraces a dynamic complex elements and attitudes imbued with meanings, in which those involved can assume both the role of carers as care beings, even a carefully tied to prescribed routines and performing procedures. Thus, the findings described refer to reflections on the care provided to cancer patients and whether this, in fact, translates principles of a humane practice
Resumo:
Actually, Brazil is one of the larger fruit producer worldwide, with most of its production being consumed in nature way or either as juice or pulp. It is important to highlig ht in the fruit productive chain there are a lot lose due mainly to climate reasons, as well as storage, transportation, season, market, etc. It is known that in the pulp and fruit processing industy a yield of 50% (in mass) is usually obtained, with the other part discarded as waste. However, since most this waste has a high nutrient content it can be used to generate added - value products. In this case, drying plays an important role as an alternative process in order to improve these wastes generated by the fruit industry. However, despite the advantage of using this technique in order to improve such wastes, issues as a higher power demand as well as the thermal efficiency limitation should be addressed. Therefore, the control of the main variables in t his drying process is quite important in order to obtain operational conditions to produce a final product with the target specification as well as with a lower power cost. M athematical models can be applied to this process as a tool in order to optimize t he best conditions. The main aim of this work was to evaluate the drying behaviour of a guava industrial pulp waste using a batch system with a convective - tray dryer both experimentally and using mathematical modeling. In the experimental study , the dryin g carried out using a group of trays as well as the power consume were assayed as response to the effects of operational conditions (temperature, drying air flow rate and solid mass). Obtained results allowed observing the most significant variables in the process. On the other hand, the phenomenological mathematical model was validated and allowed to follow the moisture profile as well as the temperature in the solid and gas phases in every tray. Simulation results showed the most favorable procedure to o btain the minimum processing time as well as the lower power demand.
Resumo:
Increasing energy demand is being met largely by fossil fuel reserves, which emit CO2, SOx gases and various other pollutants. So does the search for fuels that emit fewer pollutants and have the same energy efficiency. In this context, hydrogen (H2) has been increasingly recognized as a potential carrier of energy for the near future. This is because the H2 can be obtained by different routes and has a wide application area , in addition to having clean burning, generating only H2O as a product of combustion , and higher energy density per unit mass . The Chemical Looping Reforming process (CLR) has been extensively investigated in recent years, it is possible to regenerate the catalyst by applying cycles of reduction and oxidation. This work has as main objective to develop catalysts based on nickel and cobalt to study the reactivity of reform with chemical recycling process. The catalysts were prepared by three different methods: combustion assisted by microwave, wet impregnation and co-precipitation. All catalysts synthesized have the same amount by weight of the active phases (60% w / w). The other 40 % m/m consists in La2O3 (8% w / w), Al2O3 (30% w / w) and MgO (2%). Oxygen carriers have been named as follows: N or C, nickel or cobalt, followed by the number 3 or 6, meaning 30 to 60% of active phase in the oxide form and C, CI or CP, which means self-combustion assisted by microwave, self-combustion assisted by microwave followed by wet impregnation and co-precipitation. The oxygen carriers were then characterized by the techniques of X-ray diffraction (XRD), surface area (BET), temperature programmed reduction (TPR) and scanning electron microscopy (SEM). The characterization results showed that the different synthesis methods have led to obtaining different morphologies and structures. Redox tests using CH4 as reducing agent and sintetic air as oxidant agent was done with N6C and C6C, N6CI and C6CI and N6CP and C6CP oxygen carriers. The tests revealed different behaviors, depending on active phase and on synthesis procedure. N6C oxygen carrier produced high levels of H2. The C6CI oxygen carrier produced CO2 and H2O without carbon deposits.
Resumo:
This study offers an analytical approach in order to provide a determination of the temperature field developed during the DC TIG welding of a thin plate of aluminum. The non-linear characteristics of the phenomenon, such as the dependence of the thermophysical and mechanical properties with temperature were considered in this study. In addition to the conductive heat exchange process, were taken into account the exchange by natural convection and radiation. A transient analysis is performed in order to obtain the temperature field as a function of time. It is also discussed a three-dimensional modeling of the heat source. The results obtained from the analytical model were be compared with the experimental ones and those available in the literature. The analytical results show a good correlation with the experimental ones available in the literature, thus proving the feasibility and efficiency of the analytical method for the simulation of the heat cycle for this welding process.
Resumo:
The present dissertation aims to analyze the evaluation process of environmental performance inside an organization from the building construction section of civil construction based on the NBR ISO 14031 guidelines, which provide orientation regarding the implementation of this project towards the internal organizational management. The theoretical research has addressed concepts and historical development of environmental management inside organizations, from the emergence of the first models to the strengthening of environmental management through the standardization of the Environmental Management System caused by the publication of ISO 14001. It has also addressed the evaluation of environmental performance, the NBR ISO 14031 (concepts, types of indicators of evaluation of environmental performance, the elaboration process of such indicators, as well as its use and evaluation by the high administration). The research has an applied character, with exploratory and descriptive goals, and a qualitative approach based on case study. The data collection will be made through questionnaires, interviews, and documental analysis. Through the present research project, one expects to learn the elements taken into consideration by the organization for the elaboration and selection of indicators; to identify which interested parties contribute in the aforementioned process; to discover which sources are taken into consideration by the organization while establishing its environmental performance goals; to learn how the different kinds of environmental indicators are handled by organizations on daily basis, considering the existence of interferences on the decision making process, whether or not the interested parties are integrated, and if there is an periodical evaluation of environmental performance and how it is handled. One also expects to identify the opportunities for improvement regarding the organization that is object of study.
Resumo:
Estresses ambientais abiticos so fatores que causam respostas ao nvel molecular, fisiolgico e morfolgico em plantas, dependendo tambm de sua intensidade e durao. visto que algumas espcies apresentam tolerncia a condies estressantes e ao mesmo tempo so fontes naturais de matria prima para indstria. Nesse contexto encontra-se a mamona (Ricinus comunnis L.), principal fonte de leo de rcino valorizado por suas aplicaes farmacuticas e principalmente industriais, vem sendo usada como cultura em regies onde a disponibilidade de gua reduzida, usada como fonte de renda para agricultura da regio nordeste brasileira. Visto que pouco se sabe sobre as respostas moleculares que levam essa planta a tolerar regies secas e como as sementes, principais foco de interesse, respondem a essa escassez, nesse trabalho foram construdas duas bibliotecas de cDNAs, onde a partir de uma abordagem subtrativa, continham RNAs diferencialmente expressos em sementes de plantas mamona submetidas ao estresse hdrico durante 5 dias (biblioteca L7), e a outra RNAs diferencialmente expressos em sementes controle (biblioteca L5). A biblioteca L7 apresentou a maior variedade de transcritos com um total de 182. A maior parte das funes estabelecidas pelo sistema Gene Ontology - GO, foram direcionadas aos Processos Metablicos (526), em segundo Respostas a estmulos (57), o terceiro termo mais abundante foram referentes a Desenvolvimento(26). J na biblioteca L5, foram encontrados 91 transcritos, com maior parte de suas funes referentes a Processos Metablicos(413), em segundo Respostas a estmulos (8) e em terceiro Regulao (6). Alguns dos transcritos da biblioteca L7 foram escolhidos para anlise por repetirem-se mais de 3x e no aparecerem na biblioteca L5, o que indica uma possvel regulao positiva sobre estresse. As anlises sobre Metalotionena (4x), mostraram que a sequncia de proteica apresentava os domnios conservados que a caracterizava como tipo II, onde so encontrados dois domnios funcionais ricos em cistena com posies altamente conservadas, desempenhando a funo de ligar-se a metais pesados, correlacionadas assim como a atividade de eliminao EROs e defesa contra o estresse oxidativo, alm de apresentar homologia com a sequncia de Bruguiera gymnorhiza, uma planta de mangue adaptada a ambientes salinos. Analisamos tambm os transcritos da referente a protena AUXIN-REPRESSED 12.5 KDA (3x), apontada como sendo reprimida pelo hormnio auxina e associada ao processo de dormncia da semente, descrito em uma famlia gnica onde vrios membros pertencem as vias de resposta ao estresse. Por ltimo, analisamos a protena GLUTELIN TYPE-A 3 (5x), uma importante protena de armazenamento com carter hidroflico, possivelmente direcionada para o vacolo. Em nosso trabalho foi possvel observar um aumento de transcritos em relao a subtrao controle, possivelmente reflexo do aumento do metabolismo da semente, tanto para resposta defensiva ao estresse hdrico quanto para o amadurecimento rpido da semente onde foram observados transcritos referentes a resposta oxidativa, controle hormonal, protenas de reserva e produo de leo.
Resumo:
This research aims to provide a reflection on the preservation practices of Brasilia as Cultural Heritage in four analytical/political dimensions: conceptual, urban, political-institutional and legal. In order to do that, the preparation process for the Plan for the Preservation of Brasilia Urban Set (PPCUB) was taken as research object. This preservation plan is representative of the context which determines the relation between goals and preservation practices in the social production process of urban space. Designed by Lucio Costa in 1957, Brasilia received the Cultural Heritage title 27 years later, in 1987. It was recognized a World Heritage Site by the United Nations Educational, Scientific and Cultural (UNESCO) in the same year as it "represents a unique artistic piece of work, a masterpiece of creative genius"; and "an outstanding example of a type of construction or architectural compound that illustrates a significant stage in history" (SILVA, 2003). Brasilias urban conception, also recognised in the district and federal levels, gives prominence to the 'urban scales' monumental, residential, gregarious and bucolic as the main aspects to be preserved. Despite being an undoubted representative, Brasilia seemingly displays a contradiction. On the one hand, the essential value of the citys urban design is acknowledged as cultural heritage at international, national and district levels. On the other hand, numerous ways of urban interventions disregard the principles of that conception. In 2012, the international Monitoring Report raised some issues which highlight the following main needs: primary need for clear definition of the urban scales characteristics and boundaries; definition of a legal framework that conciliates national and district laws of occupation and use of land; creation of inter-sectors executive authority with both decision-making and financial autonomy; and promotion of heritage educational programs. This report also proposes "to cancel the current process of approval conducted by PPCUB and establish a formal consultation process through a committee made up by GDF and IPHAN, which will enable the active participation of University of Brasilia, the Architects Association, ICOMOS and local organizations" (SEDHAB, 2010). Already in its drafting process, the international recommendations evidence that preserving Brasilias urban design conception is not among the goals to be achieved. Thus, this research highlights that the intentional nature of PPCUBs plans does little towards realizing the current proposals.
Resumo:
Surface defects on steel parts borne costs of smelting industries due to the need of rework. Sand molds are frequently used in foundry industries and largely responsible for providing surface defects. This study aims to optimize the levels of the molding process variables to minimize the occurrence of surface defects in steel castings in silica sand molds chemically linked by cold cure process. The methodology used the experimental design with split plot, being considered in the study the resin percentage factors in the mold formulation, addition of iron oxide, type of paint, the paint application method, amount of ink layers, use of hot air along the lines and waiting time of the mold before casting. They were analyzed as response variables erosion defects, sand inclusion, penetration, porosity and surface finish. Tensile strength tests were performed to evaluate the influence of factors on mechanical parameters and the microstructural parameters were carried out the analysis of X-ray diffraction, scanning electron microscopy (SEM) and thermal analysis (TG / DSC / dilatometry). The results elucidate that for the faulty erosion, the only significant factor with a 95% confidence level was the type of ink and the ink alumina-based superior results obtained. For the sand inclusion of defect, there were three significant factors, with best results obtained with alumina-based paint and spray applied using hot air in the mold before casting the metal. For the defect penetration, there were four significant factors, the best results being achieved with 0.8% of resin and addition of iron oxide in the molding formulation, the paint being applied by brush and standby time of 24 hours before leak. For the defect porosity with a 95% confidence level, no significant factors. For the defect surface finish, the best results were achieved with the 0.8% formulation of the resin in the mold and application of the paint brush. To obtain the levels of the factors that optimize all defects simultaneously, we performed a weighted average of the results of each type of fault, concluding that the best levels of the factors were: 0.8% resin and addition of iron oxide in the formulation of the template, application of two coats of paint applied with a brush or spray, using hot air in the mold before casting and 24 hours of waiting ready the mold before casting. These levels of the optimized factors were used in an experiment to confirm that ratified the results, helping to reduce rework and consequently reducing costs of cast steel parts.
Resumo:
The post-menopause stage is characterized by hormonal and organic alterations of ovarian failure. One of the most important of these is muscles alterations of the pelvic floor (MPF). According to current literature, in young women gynecological and obstetric factors, as well as lifestyles and habits influence that loss of function. However, there is still uncertainty about the influence of those variables in the MPF functions in post-menopause women. Thus, this study aimed at seeing if there is an influence from number of births, the type of birth and the level of physical activity on the MPF of post-menopause women. Another objective of this study was to compare MPF force in women who had had vaginal births with those who had been subjected to cesarean sections, those with different levels of physical activity and those with artificial and natural menopause in the initial and latter stages. Furthermore, the test of muscular force was compared to perineometry. Using observational, analytical and transversal observations, 100 women in the post-menopausal stage of life, between the ages of 45 and 65, were examined. They were divided according to the menopausal stage into three groups: women who had undergone hysterectomies, those in the initial stages of postmenopause and those in the late stage of postmenpause. The patients were questioned about social, demographic, gynecological and obstetric factors. All the volunteers were submitted to a physical examination where their height and weight were measured to arrive at the corporal mass index and their waist measurements were taken. The evaluation of the pelvic floor was conducted with muscular force tests and perineometry. These results were analyzed with statistical description and ANOVA statistical tests, multiple regression and Kolmogorov-Smirnov evaluations. The results showed homogeneity with regard to social demographic and anthropometric characteristics among the women in the final test sample (n=85). It was also seen that most of the women in all three groups were married (p=0.51) and catholic (p=0.13). The average per capital income varied between $R585.47 (+/-466.67) and $R1,271.83 (+/-1,748.95), with no significant difference between the groups (p=0.05). The G>6 group presented an average age between 58.95 (+/-3.96) which was significantly greater that the G<6 groups average age (53.21+/- 3.88) (p=0.000). There was no difference between the groups anthropometric characteristics of weight (p=0.32), height (p=0.72) and corporal mass index (p=0.34), nor in the waist measurements (p=0.33). Furthermore, no significant difference was noted in the MPF function of women who had had normal births, cesarean sections or a combination of the two (TFM p=0.897; perineum measurement p=0.502). Likewise, no differences were seen in the MPF function of women who had one, two to three or four or more births (TFM p=0.28, perineum measurement p=0.13). Finally, no difference was perceived among those with different levels of physical activity (TFM p=0.663; perineum measurement p=0.741). Therefore, we found that the type of delivery, number of births and physical activity had no influence on the muscular function of the pelvic floor among the women studied. It is believed that decline in muscular function in post-menopause women is fundamentally related to the process of aging.
Resumo:
In this work it is assessed the performance of Portland cement-based mortar to the grouting of type II ceramic plates with the addition of unusable tire rubber powder. It is presented a bibliographical review about the subject in which is done the theoretical and methodological foundation of the whole investigative process. The analyzed universe comprises a sample of mortar to the grouting of conventional ceramic plates type II (reference sample) and five more samples to the grouting of ceramic plates type II, which were made up of the addition of unusable tire rubber powder in the respective proportion (in mass) of 4%, 8%, 12%, 16% and 20%. These mortar samples were subject to the trials of determination of the consistency index (Brazilian Standard NBR 13276:2005), water retention ( Brazilian Standard NBR 14992 Attachment B:2003), permeability in 240 minutes (Brazilian Standard NBR 14992 Attachment G:2003), absorption of water by immersion (Brazilian Standard NBR 9781:2013), resistance to compression (Brazilian Standard NBR14992 Attachment D: 2003), resistance to traction in the flexion (Brazilian Standard NBR 13279:2005), resistance of traction adherence (Brazilian Standard NBR 14081 part 4:2012) and hardened mass density (Brazilian Standard NBR 13280: 2005). It has been found out from the analyzes of the results in the trial the following situation: the reference mortar used met the established requirements in the norms of specifications corresponding to only six from the eight parameters assessed in the research; the mortar with addition of 4,0% of tire rubber powder met the established requirements corresponding to only the resistance to compression and the resistance of adherence to traction. Thus, the other kinds of mortar with addition of 8,0 %, 12,0 %, 16,0 % and 20,0 % of tire rubber powder met the requirements of specifications corresponding to only the resistance to compression and the resistance of adherence to traction. This result concludes that the adding of tire rubber powder does not grant improvement to the mortar of type II grouting to the laying of ceramic plates.
Resumo:
In this work it is assessed the performance of Portland cement-based mortar to the grouting of type II ceramic plates with the addition of unusable tire rubber powder. It is presented a bibliographical review about the subject in which is done the theoretical and methodological foundation of the whole investigative process. The analyzed universe comprises a sample of mortar to the grouting of conventional ceramic plates type II (reference sample) and five more samples to the grouting of ceramic plates type II, which were made up of the addition of unusable tire rubber powder in the respective proportion (in mass) of 4%, 8%, 12%, 16% and 20%. These mortar samples were subject to the trials of determination of the consistency index (Brazilian Standard NBR 13276:2005), water retention ( Brazilian Standard NBR 14992 Attachment B:2003), permeability in 240 minutes (Brazilian Standard NBR 14992 Attachment G:2003), absorption of water by immersion (Brazilian Standard NBR 9781:2013), resistance to compression (Brazilian Standard NBR14992 Attachment D: 2003), resistance to traction in the flexion (Brazilian Standard NBR 13279:2005), resistance of traction adherence (Brazilian Standard NBR 14081 part 4:2012) and hardened mass density (Brazilian Standard NBR 13280: 2005). It has been found out from the analyzes of the results in the trial the following situation: the reference mortar used met the established requirements in the norms of specifications corresponding to only six from the eight parameters assessed in the research; the mortar with addition of 4,0% of tire rubber powder met the established requirements corresponding to only the resistance to compression and the resistance of adherence to traction. Thus, the other kinds of mortar with addition of 8,0 %, 12,0 %, 16,0 % and 20,0 % of tire rubber powder met the requirements of specifications corresponding to only the resistance to compression and the resistance of adherence to traction. This result concludes that the adding of tire rubber powder does not grant improvement to the mortar of type II grouting to the laying of ceramic plates.
Resumo:
With an increasing number of mature fields, heavy oil recovery has performed one of the great challenges of the oil industry. The Brazilian Northeast, for example, has numerous heavy oil reservoirs are explored with the use of thermal methods. Among the types of methods used for heavy oil, there is the method of in-situ combustion, a technique in which heat is produced within the container, unlike the injection of heated fluid when the heat is generated at the surface and transported to the reservoir. In this type of process, it is common to use vertical wells as injectors and producers. However, methods which use horizontal wells like oil producers are increasingly studied because of greater contact area between the formation and combustion front. Thus, the main objective of this work was to study the different configurations of wells (CIS THAITM and CAGD) in the process of in-situ combustion in oil recovery using a semi-synthetic tank with Brazilian Northeast features. The method "toe-to-heel air injection" (THAITM) is a process of enhanced oil recovery, which is the integration of in-situ combustion with technological advances in drilling horizontal wells. This method uses horizontal wells such as oil producers, keeping vertical injection wells for injecting air. The oil drain process by differential gravitational assisted with combustion (CAGD) is an integrated, in this configuration the horizontal injector well is drilled at the top formation with a horizontal production well in the lower section. The simulations were performed in a commercial program of thermal processes, called "STARS" (Steam, Thermal, and Advanced Processes Reservoir Simulator), the company CMG (Computer Modelling Group). An analysis of the air flow injection was performed and it was found that each method had a maximum injection to the base model, a show that through this air injection limit was reduced cumulative production of oil. Analyses of operating parameters were used: injection flow, configuration and completion of wells. In the sensitivity analysis we found that the air injection flow showed greater influence on THAI method, since the CIS method the completion of the wells was the most influential parameter and CAGD configuration wells showed the greatest influence in the recovered fraction. The economic results have shown that the best case obtained in CAGD method because, despite having higher initial cost showed the best financial return compared to the best cases the CIS and THAI.
Resumo:
With an increasing number of mature fields, heavy oil recovery has performed one of the great challenges of the oil industry. The Brazilian Northeast, for example, has numerous heavy oil reservoirs are explored with the use of thermal methods. Among the types of methods used for heavy oil, there is the method of in-situ combustion, a technique in which heat is produced within the container, unlike the injection of heated fluid when the heat is generated at the surface and transported to the reservoir. In this type of process, it is common to use vertical wells as injectors and producers. However, methods which use horizontal wells like oil producers are increasingly studied because of greater contact area between the formation and combustion front. Thus, the main objective of this work was to study the different configurations of wells (CIS THAITM and CAGD) in the process of in-situ combustion in oil recovery using a semi-synthetic tank with Brazilian Northeast features. The method "toe-to-heel air injection" (THAITM) is a process of enhanced oil recovery, which is the integration of in-situ combustion with technological advances in drilling horizontal wells. This method uses horizontal wells such as oil producers, keeping vertical injection wells for injecting air. The oil drain process by differential gravitational assisted with combustion (CAGD) is an integrated, in this configuration the horizontal injector well is drilled at the top formation with a horizontal production well in the lower section. The simulations were performed in a commercial program of thermal processes, called "STARS" (Steam, Thermal, and Advanced Processes Reservoir Simulator), the company CMG (Computer Modelling Group). An analysis of the air flow injection was performed and it was found that each method had a maximum injection to the base model, a show that through this air injection limit was reduced cumulative production of oil. Analyses of operating parameters were used: injection flow, configuration and completion of wells. In the sensitivity analysis we found that the air injection flow showed greater influence on THAI method, since the CIS method the completion of the wells was the most influential parameter and CAGD configuration wells showed the greatest influence in the recovered fraction. The economic results have shown that the best case obtained in CAGD method because, despite having higher initial cost showed the best financial return compared to the best cases the CIS and THAI.