Submitted by Jorge Silva (jorgelmsilva@ufrrj.br) on 2018-11-12T17:56:54Z No. of bitstreams: 1 2013 - N?bya Dalvi Calabrez.pdf: 2204521 bytes, checksum: 71b05e242a3884d827606854f30c0359 (MD5) / Made available in DSpace on 2018-11-12T17:56:54Z (GMT). No. of bitstreams: 1 2013 - N?bya Dalvi Calabrez.pdf: 2204521 bytes, checksum: 71b05e242a3884d827606854f30c0359 (MD5) Previous issue date: 2013-08-23 / CAPES / Petrobras / Filtration and invasion of drilling fluids are phenomena that occur during the process of drilling oil wells. It is necessary to know the filter cake behavior, which is formed in order to prevent unwanted invasion of filtrate, which can cause irreversible damage for the reservoir rock, making impossible the well to produce oil. The goals of this work were: to study filtration and invasion of drilling fluids, under static and dynamic conditions, characterize the mudcake, obtain comparative results between different fluids (water base mud and emulsion) and model static filtration. For this, experiments were conducted in a high temperature/high pressure cell filtration, using filter paper as filter medium. The cake formed from the filtration of these fluids was characterized according to parameters such as porosity, permeability, compressibility, thickness, shear strength and friction factor. In a comparison between different fluids, it was observed that the water-based mud provided a mudcake more permeable and more porous than emulsion mudcake. Thus, water-based mud allowed more filtrate passed through the filter medium. The factors relevant to the estimation of the friction factor were determined. It was concluded that the compressibility index of the filter cake was a factor which had great influence on the estimation of this parameter. The model allowed the prediction of static filtration, slowness and mudcake thickness curves as a function of time. / A filtra??o e a invas?o de fluidos de perfura??o s?o fen?menos que ocorrem durante o processo de perfura??o de po?os de petr?leo. ? necess?rio conhecer como se comporta a torta de filtra??o formada a fim de evitar invas?es indesejadas do filtrado, o que pode causar danos muitas vezes irrevers?veis a rocha reservat?rio, tornando o po?o invi?vel para a produ??o do ?leo. Os objetivos desse trabalho foram: estudar os fen?menos de filtra??o e invas?o de fluidos de perfura??o base ?gua e emuls?o, sob condi??es est?ticas e din?micas, caracterizar a torta formada, obter resultados comparativos entre diferentes fluidos (base ?gua e emuls?o) e modelar a filtra??o est?tica. Para isso, foram conduzidos experimentos em uma c?lula de filtra??o high temperature/high presssure, utilizando papel de filtro como meio filtrante. A torta formada, a partir da filtra??o desses fluidos, foi caracterizada de acordo com par?metros como: porosidade, permeabilidade, compressibilidade, espessura, resist?ncia ao cisalhamento e fator de fric??o. Na compara??o entre os resultados experimentais para diferentes fluidos, observou-se que o fluido a base ?gua, por formar uma torta mais perme?vel e mais porosa, permitiu que mais filtrado passasse pelo meio filtrante, quando comparado ao fluido base ?leo (emuls?o). Foram estudados os fatores relevantes na estima??o do fator de fric??o da torta de filtra??o e concluiu-se que a compressibilidade da torta foi um fator que teve grande influ?ncia na estima??o desse par?metro. A modelagem da filtra??o est?tica possibilitou a previs?o do comportamento das curvas de filtra??o, de slowness e da espessura da torta em fun??o do tempo.