Tout comme les crises, la responsabilité sociale des entreprises (RSE) implique des domaines complexes, tels que la protection de l’environnement, la gestion des ressources humaines, la sécurité au travail et les rapports avec les communautés locales. Lors d’une crise, des éléments critiques et d’ordre éthique placent souvent l’entreprise au rôle de « coupable » et les parties prenantes de l’entreprise, dans celui de victime. Cette approche peut être dépassée car au moment où cette dernière entreprend des actions pour gérer la crise, ses décisions peuvent refléter son engagement social et avoir une influence directe sur la situation critique. Face à ces enjeux, ce travail de recherche s’intéresse à la crise organisationnelle comme facteur de motivation pour le développement de la RSE au sein des organisations. L’objectif est d’observer la manière dont la RSE est utilisée en temps de crise compte tenu de la pression issue des parties prenantes. Pour cela, deux entreprises du secteur pétrolier sont analysées : le groupe français Total et le groupe brésilien Petrobras. A travers une approche qualitative, et utilisant essentiellement des données de la presse, une base de données a été construite. Cette dernière, alliée au cadre conceptuel mobilisé pour ce travail, a permis l’analyse des choix stratégiques en termes de RSE avec lesquels Total et Petrobras ont répondu à certaines crises, en considérant le rôle des parties prenantes vis-à-vis de telles actions et en les replaçant dans leurs contextes temporel, culturel et politique. Le résultat de cette recherche est l’identification de cinq mécanismes élaborés par les entreprises pour répondre à la crise et aux exigences des parties prenantes. / As well as crises, corporate social responsibility (CSR) concerns complex fields, such as environmental protection, human resources management, safety at work and the relationship with local communities. At a moment of crisis, ethical and critical elements often place the enterprise as guilty and its stakeholders as victims. Such an approach may be exceeded, since when the enterprise begins its actions to manage the crisis, the decisions taken could show its commitment to social concerns, having an important impact on the critical situation. Considering these challenges, this study aims to explore organizational crisis as a motivation for the development of CSR within enterprises. The purpose of this research is to observe how CSR practices can be employed during critical times, taking into account the pressure stakeholders exert on the enterprise. In order to reach this goal, two oil companies are analyzed: Total and Petrobras; the former being a French group and the later a Brazilian company. Through a qualitative approach, a database was built using information from the press. This database, allied with a conceptual framework, allowed to analyze the tactical choices used by Total and Petrobras to react to certain crises in what concerns their CSR practices. Such decisions were examined through a political, cultural and temporal context bearing in mind the role of stakeholders. The result of this research is the identification of, five mechanisms elaborated by the enterprises to act in response to stakeholders’ pressure in times of crisis.

L'injection de tensioactifs est une méthode très appliquée dans le domaine de la récupération améliorée des hydrocarbures. Cependant, son efficacité repose sur la capacité de ces agents chimiques à mobiliser l'huile résiduelle en diminuant la tension interfaciale entre l'huile et l'eau. Des modèles à l'échelle du réservoir calculent l'efficacité de la récupération d'huile résiduelle par injection de solutions contenant des tensioactifs. Les mécanismes physiques pris en compte dans les modélisations font intervenir la physico-chimie du système roche-fluide et une courbe globale donnant la saturation résiduelle en huile en fonction du nombre capillaire (courbe de désaturation capillaire). Cette donnée est majeure dans le calcul de l'efficacité de récupération d'huile par injection de solutions de tensioactifs. En effet la mobilisation de l'huile résiduelle laissée en place après injection d'eau n'est possible qu'en augmentant considérablement le nombre capillaire. La prédiction de l'efficacité d'un procédé chimique de récupération passe par la compréhension, à l'échelle du pore, du processus de mobilisation des ganglions d'huile suivant la structure poreuse et le nombre capillaire. L'objet de cette thèse est de caractériser la récupération d'huile tertiaire en fonction du nombre capillaire dans diverses roches mouillables à l'eau. Ces courbes permettront de quantifier l'effet de la microstructure, les hétérogénéités du milieu poreux et diverses propriétés pétrophysiques sur la récupération d'huile. Cette thèse permettra aussi de caractériser les différents mécanismes d'action de tensioactifs sur la mobilisation d'huile résiduelle dans le milieu poreux. L'expérimentation par tomographie RX est utilisée. La tomographie RX permettra de caractériser les courbes de désaturation capillaire à l'échelle de Darcy et visualiser localement le déplacement d'huile résiduelle à travers les milieux poreux. Des essais d'écoulement diphasique sous micro-CT permettront d'observer in-situ et d'étudier les interfaces eau/huile et leurs évolutions en 3D au sein du milieu poreux en fonction du nombre capillaire. / Oil recovery by surfactant injection is related to oil-water interfacial tension and rock properties through the capillary number. In the modeling of oil recovery by surfactant injection, fluid flow physical mechanisms are represented through the capillary desaturation curve (CDC). This curve is central in the evaluation of oil recovery efficiency. In order to mobilize residual oil trapped after waterflooding by capillary forces, chemical EOR rely on increasing capillary number to extremely high values. The mechanisms governing oil release can be described at the pore scale where the balance of capillary and viscous forces is achieved. This description will help to predict the efficiency of surfactant based EOR processes by taking into account the porous geometry and topology, the physico-chemical properties of the fluids and the different phase interaction. The objective of this work is to characterize capillary desaturation curves for various strongly water-wet sandstones. These curves will be used to study the relationship between tertiary oil recovery and the pore structure, porous media heterogeneity and petrophysicals properties. The other aim of this work is to map the different mechanisms of oil recovery by surfactant injection. Experiments under X-Ray tomography are proposed. X-Ray tomography will be applied to characterize capillary desaturation curve at Darcy scale and to visualise the two phase flow saturation after injection. Pore scale experiments based on X-Ray micro-tomography imaging are performed to describe the different mechanisms of oil mobilization.

Allocating production volumes across a portfolio of producing assets is a complex optimization problem. Each producing asset possesses different technical attributes (e.g. crude type), facility constraints, and costs. In addition, there are corporate objectives and constraints (e.g. contract delivery requirements). While complex, such a problem can be specified and solved using conventional deterministic optimization methods. However, there is often uncertainty in many of the inputs, and in these cases the appropriate approach is neither obvious nor straightforward. One of the major uncertainties in the oil and gas industry is the commodity price assumption(s). This paper investigates this problem in three major sections: (1) We specify an integrated stochastic optimization model that solves for the optimal production allocation for a portfolio of producing assets when there is uncertainty in commodity prices, (2) We then compare the solutions that result when different price models are used, and (3) We perform a value of information analysis to estimate the value of more accurate price models. The results show that the optimum production allocation is a function of the price model assumptions. However, the differences between models are minor, and thus the value of choosing the “correct” price model, or similarly of estimating a more accurate model, is small. This work falls in the emerging research area of decision-oriented assessments of information value. / text

Made available in DSpace on 2011-05-04T12:42:06Z (GMT). No. of bitstreams: 0 Previous issue date: 2010 / Este trabalho foi concebido a partir da reflexão e discussão sobre as principais oportunidades para a abordagem integrada de Saúde Pública e Meio Ambiente, considerando o atual cenário energético mundial, a introdução de novas tecnologias de produção e a necessidade de construção de uma referência conceitual e prática que considere a interação entre Saúde, Meio Ambiente, Responsabilidade Social das Empresas e Desenvolvimento Sustentável. Considerando os inúmeros desafios para o controle dos impactos ambientais e de saúde, através da gestão efetiva de responsabilidade social de empresas potencialmente poluidores, particularmente da indústria de petróleo e energia, essa tese tem como principal objetivo discutir como os aspectos de saúde podem ser incorporados ao licenciamento ambiental do setor petróleo. Para isso foi utilizada uma abordagem metodológica exploratória, por meio de exaustivo levantamento bibliográfico na literatura científica e institucional deáreas empresariais e governamentais responsáveis pela obtenção e concessão de licenças ambientais. A partir da seleção e análise de documentação oficial, particularmente dos estudos e relatórios de impacto ambiental (EIA/RIMA) de empreendimentos nacionais de exploração, produção e refino do petróleo, avaliousea existência de evidências e oportunidades para a inserção de questões de saúde nos respectivos projetos de investimento desse setor. Como ferramenta de avaliação dessas questões nos EIA/RIMA dos empreendimentos selecionados, foi utilizada uma adaptação de uma matriz de análise validada para o setor hidrelétrico, cujas categorias analíticas foram baseadas nos parâmetros estabelecidos para os estudos de avaliação de impacto ambiental pela Resolução CONAMA 1/86 e nos principais aspectos da metodologia de Avaliação de Impactos à Saúde (AIS). Como resultado, a matriz empregada mostrou-se um instrumento metodológico com grande potencial para orientar a incorporação dos aspectos desaúde no processo de licenciamento ambiental, instrumentalizando a Avaliação de Impacto Ambiental (AIA) e subsidiando a tomada de decisão, contribuindo, portanto, para uma gestão socioambiental mais proativa do setor petróleo. / This work was conceived from the discussion about the main opportunities for the integrated approach of Public Health and Environment, considering the current world energy scenario, the introduction of new production technologies and the need for a more comprehensive conceptual reference among Health, Environment, Social Responsibility and Sustainable Development. Considering the several challenges for effective management of the environmental and health impacts, particularly caused by oil industry, strategic for the development and economical growth of our country, the main objective of this thesis is discuss how the health aspects could be incorporated to the environmental licensing of this sector. An exploratory methodological approach was used, starting from an exhausting bibliographical research in scientific and institutional literature, produced by companies and government areas related with the environmental licenses. The health evidences and opportunities in the main official documents, particularly studies and reports of the environmental impacts (EIA/RIMA, in portuguese) of national enterprises of oil exploration, production and refining, was evaluated. An adapted matrix, validated for the hydroelectric sector, was used like a tool for assessment of health subjects in the selected RIMA. The analytical categories of this matrix were based on the established parameters for the studies of environmental impact assessment of CONAMA Resolution 1/86, and on the main aspects of Health Impact Assessment (HIA) methodology. As result, this matrix was considered like an important instrument with great potential to guide the incorporation of the health aspects in the environmental licensing, supporting the Environmental Impact Assessment (EIA) and decision makers, contributing to a proactive social and environmental management of the petroleum industry.