Abstract
<p>Since the 1960s, because of the relevance to the oil industry, the numerical simulation of hydrocarbon reservoirs has received special attention and has been the subject of extensive studies. The main goal of computational modeling and the use of numerical methods for reservoir simulation is to allow better placement and control of wells, so that there is a optimized oil recovery. In this work, production of hydraulically fractured horizontal wells in light tight oil reservoirs will be studied. In this case, fractures do not form a continuous conductive network and can communicate hydraulically with only the horizontal producer well. In order to do that, a simulator for three-dimensional oil flow in reservoirs, suitable for applications in the field scale, already developed, using the Cartesian coordinate system and a finite difference approach, will be applied for the study of hydraulically fractured horizontal wells. Originally, this simulator and its grid refinement tools had been used only on the simulation of naturally fractured reservoirs. The nonlinear partial differential equation resulting from physical-mathematical modeling, written in terms of pressure, will be solved numerically after discretization and linearization using the Preconditioned Conjugate Gradient method. The main objective is to study the combined effects of hydraulic fractures and horizontal well on the wellbore pressure profile, considering different light tight oil production scenarios. Numerical simulations displayed the influence of important parameters on the well-reservoir system in study, such as fracture permeability and matrix porosity. A study of this type is relevant on the discussion of reservoir production strategies, helping on the decisions about a hydraulic fracturing operation in order to obtain economic viability for the hydrocarbons recovery project.</p><p><strong>Keywords</strong>: reservoir simulation, light tight oil, horizontal well, hydraulic fracturing, nite diferences method.</p>
Highlights
Since the 1960s, because of the relevance to the oil industry, the numerical simulation of hydrocarbon reservoirs has received special attention and has been the subject of extensive studies
Revisa-se, agora, algumas propriedades de uido incluídas na modelagem do escoamento monofásico em meios porosos
Vt onde φ é a porosidade, Vt o volume total e Vp o volume de vazios que também pode ser denominado de volume poroso [17]
Summary
Desde a década de 1960, devido à pertinência para a indústria petrolífera, a simulação numérica de reservatórios portadores de hidrocarbonetos vem recebendo uma atenção especial e tem sido alvo de amplos estudos. Do ponto de vista econômico, o conhecimento do comportamento do escoamento no reservatório durante a sua explotação é relevante, porque ele fornece dados que ajudam a estimar as características da produção de petróleo,. Dentre os problemas que suscitam um grande interesse encontra-se o fraturamento hidráulico em reservatórios com poços horizontais de produção. Entender a inuência desses dois mecanismos na produtividade dos reservatórios é crucial para a indústria do petróleo. Muitos autores têm estudado e desenvolvido modelos para a simulação de poços horizontais com fraturamento hidráulico, como por exemplo, [2], [3], [4], [5] e [6], incluindo a aplicação em reservatórios de baixa permeabilidade portadores de óleo leve ([7] e [8])
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