Made available in DSpace on 2014-12-17T14:08:38Z (GMT). No. of bitstreams: 1 Janaina Medeiros Dantas Barbosa_DISSERT_01_35.pdf: 3284535 bytes, checksum: 7cd819680331f233db6c8299e7522b7b (MD5) Previous issue date: 2009-06-12 / Petr?leo Brasileiro SA - PETROBRAS / Continuous steam injection is one of heavy oil thermal recovery methods used in the Brazilian Northeast because of high occurrence of heavy oil reservoir. In this process, the oil into the reservoir is heated while reduces, substantially, its viscosity and improves the production. This work analyzed how the shaly sand layers influenced in the recovery. The studied models were synthetics, but the used reservoir data can be extrapolated to real situations of Potiguar Basin. The modeling was executed using the STARS - Steam Thermal and Advanced Process Reservoir Simulator - whose version was 2007.10. STARS is a tool of CMG Computer Modeling Group. The study was conducted in two stages, the first we analyzed the influence of reservoir parameters in the thermal process, so some of these were studied, including: horizontal permeability of the reservoir and the layer of shaly sand, ratio of horizontal permeability to vertical permeability, the influence of capillary pressure layer of shaly sand and as the location and dimensions of this heterogeneity can affect the productivity of oil. Among the parameters studied the horizontal permeability of the reservoir showed the most significant influence on the process followed by diversity. In the second stage three models were selected and studied some operational parameters such as injection rate, distance between wells, production time and completion intervals. Among the operating parameters studied the low rate and intermediate distances between wells showed the best recoveries / A inje??o cont?nua de vapor ? um dos m?todos t?rmicos de recupera??o de ?leos pesados utilizados no Nordeste Brasileiro, devido ? grande ocorr?ncia de reservat?rios contendo este tipo de ?leo. Este processo consiste em aquecer o ?leo existente no reservat?rio diminuindo substancialmente a sua viscosidade melhorando assim, a sua produ??o. Neste trabalho foi estudada qual a influ?ncia da presen?a de camadas de areia argilosas no reservat?rio para este tipo de recupera??o. Os modelos s?o sint?ticos, por?m com dados de reservat?rios que podem ser extrapolados para situa??es de aplica??es pr?ticas na Bacia Potiguar que apresenta reservat?rios com essa heterogeneidade. A modelagem foi implementada no simulador de recupera??o t?rmica STARS (Steam, Thermal, and Advanced Processes Reservoir Simulator) vers?o 2007.10 da CMG (Computer Modelling Group). O estudo foi realizado em duas etapas, na primeira foi analisada a influ?ncia dos par?metros de reservat?rio neste processo t?rmico, sendo assim, alguns desses foram estudados, dentre eles: permeabilidade horizontal do reservat?rio e da camada de areia argilosa, rela??o da permeabilidade horizontal com a permeabilidade vertical, influ?ncia da press?o capilar da camada de areia argilosa e como a localiza??o e as dimens?es dessa heterogeneidade podem afetar a produtividade de ?leo. Dentre os par?metros estudados a permeabilidade horizontal do reservat?rio foi o que apresentou maior influ?ncia significativa ao processo seguido da heterogeneidade. Na segunda etapa foram selecionados tr?s modelos e estudado alguns par?metros operacionais, tais como: vaz?o de inje??o, dist?ncia entre po?os, tempo de produ??o e intervalos de completa??o. Dentre os par?metros operacionais estudados as baixas vaz?es e as dist?ncias entre po?os intermedi?rias foram as que apresentaram as melhores recupera??es

Made available in DSpace on 2014-12-17T14:08:51Z (GMT). No. of bitstreams: 1 LiaraTV_DISSERT.pdf: 1753803 bytes, checksum: 5e53187cb6e33e84a341ab8ca9fd48da (MD5) Previous issue date: 2011-12-22 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / The objective of the thermal recovery is to heat the resevoir and the oil in it to increase its recovery. In the Potiguar river basin there are located several heavy oil reservoirs whose primary recovery energy provides us with a little oil flow, which makes these reservoirs great candidates for application of a method of recovery advanced of the oil, especially the thermal. The steam injection can occur on a cyclical or continuous manner. The continuous steam injection occurs through injection wells, which in its vicinity form a zone of steam that expands itself, having as a consequence the displace of the oil with viscosity and mobility improved towards the producing wells. Another possible mechanism of displacement of oil in reservoirs subjected to continuous injection of steam is the distillation of oil by steam, which at high temperatures; their lighter fractions can be vaporized by changing the composition of the oil produced, of the oil residual or to shatter in the amount of oil produced. In this context, this paper aims to study the influence of compositional models in the continuous injection of steam through in the analysis of some parameters such as flow injection steam and temperature of injection. Were made various leading comparative analysis taking the various models of fluid, varying from a good elementary, with 03 pseudocomponents to a modeling of fluids with increasing numbers of pseudocomponents. A commercial numerical simulator was used for the study from a homogeneous reservoir model with similar features to those found in northeastern Brazil. Some conclusions as the increasing of the simulation time with increasing number of pseudocomponents, the significant influence of flow injection on cumulative production of oil and little influence of the number of pseudocomponents in the flows and cumulative production of oil were found / O objetivo da recupera??o t?rmica ? aquecer o reservat?rio e o ?leo nele existente para aumentar a sua recupera??o. Na Bacia Potiguar existem v?rios reservat?rios de ?leos pesados cuja energia de recupera??o prim?ria nos fornece uma vaz?o de ?leo pequena, o que torna tais reservat?rios ?timos candidatos para aplica??o de um m?todo de recupera??o avan?ada de petr?leo, especialmente o t?rmico. A inje??o de vapor pode ocorrer de forma c?clica ou cont?nua. A inje??o de vapor cont?nua ocorre atrav?s de po?os injetores, pr?ximos aos quais se forma uma zona de vapor que se expande, tendo como conseq??ncia o deslocamento do ?leo com viscosidade e mobilidade melhoradas na dire??o dos po?os produtores. Outro mecanismo poss?vel de deslocamento do ?leo em reservat?rios submetidos ? inje??o cont?nua de vapor ? a destila??o do ?leo por vapor, o qual quando alcan?am altas temperaturas, suas fra??es mais leves podem ser vaporizadas alterando a composi??o do ?leo produzido, do ?leo residual ou impactar na quantidade de ?leo produzida. Nesse contexto, este trabalho objetiva estudar a influ?ncia de modelos composicionais na inje??o cont?nua de vapor atrav?s de uma an?lise de par?metros como vaz?o de inje??o de vapor e temperatura de inje??o. Foram realizadas diversas an?lises comparativas levando os diversos modelos de fluidos, variando de um bem elementar, com 03 pseudocomponentes at? modelagens de fluidos com n?meros crescentes de pseudocomponentes. Foi utilizado um simulador num?rico comercial para o estudo a partir de um modelo de reservat?rio homog?neo com caracter?sticas similares ?s encontradas no Nordeste brasileiro. Algumas conclus?es como o aumento do tempo de simula??o com o aumento do n?mero de pseudocomponentes, a influ?ncia significativa da vaz?o de inje??o na produ??o acumulada de ?leo e a pouca influ?ncia do n?mero de pseudocomponentes nas vaz?es e produ??o acumulada de ?leo foram constatadas