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首页> 外文会议>SPE Western Regional Meeting >Finite Element Modeling of Reservoir Heating By An Electrical Cable
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Finite Element Modeling of Reservoir Heating By An Electrical Cable

机译：电缆储层加热的有限元建模

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Heat, mostly in terms of steam latent heat of vaporization, has been injected into heavy or extra heavy reservoirs worldwide to assist producing the in-situ oils. More recently, heat has been introduced directly into the reservoir by means of placing an electrical cable at the middle of the well in front of the target interval. Design of these electrical cables which supply a specific amount of heat energy per cable length, W/m, when placed in front of the target zone, have been evolving from manufacturing point of view to benefit oil operations worldwide in many ways. The purpose of this study is to investigate the heat transfer effects from the electric cable into stagnant gases of the wellbore media, casing, and reservoir porous media which are surrounding the electric cable. Two types of wells, vertical and horizontal have been studied. The objective is to calculate heat requirement to establish desired temperature distribution beyond the sandface. The mathematical model used to study the heat transfer effects were built by a finite element model software package. In case of cased hole, the heat transfer from the cable propagates through stagnant gases and enters the casing before entering the porous media. In case of open-hole completion, the heat from the cable is transferred to stagnant gases in the wellbore before entering the porous media. Effects of different heating amounts in W/m on the sand-face temperature and deep into the porous media have been investigated for vertical and horizontal well configurations at different energy input conditions. Finite element model results were compared with other similar studies. Results of the finite element modeling show that for all cases including vertical and horizontal wells, the sand-face quickly heats up. As time goes on, a distance into the porous media is also heated up which in return assists oil recovery from a larger vicinity from the well. Heating via electric cables can be beneficial in wellbore cleaning from paraffin, wax and hydrate build ups thus initiating oil recovery from near wellbore area. Total reservoir heating can provide In-situ upgrading of the heavy and extra heavy oils.
机译：热量，主要是在蒸发蒸发热的方面，在全球范围内注入重型或超重水库，以帮助产生原位油。最近，通过将电缆在目标间隔前面的井中放置电缆，通过将电缆直接引入储液器中。当放置在目标区域前面时，为每个电缆长度提供特定的热能的这些电缆的设计一直在发展，从制造的观点中发展，以便在许多方面受益于全世界的石油操作。本研究的目的是研究来自电缆的热传递效应进入井口介质，壳体和储层围绕电缆的储层多孔介质的滞留气体。已经研究了两种类型的井，垂直和水平。目的是计算热量要求，以建立超出砂面的所需温度分布。用于研究传热效果的数学模型由有限元模型软件包构建。在套管孔的情况下，来自电缆的热传递通过停滞气体传播并在进入多孔介质之前进入壳体。在开孔完成的情况下，在进入多孔介质之前，来自电缆的热量在井筒中转移到井筒中的停滞气体。在不同能量输入条件下研究了在不同能量输入条件下的垂直和水平井配置的不同加热量对砂面温和深孔的影响。将有限元模型结果与其他类似研究进行了比较。有限元建模的结果表明，对于包括垂直和水平井的所有案例，砂面快速加热。随着时间的推移，进入多孔介质的距离也被加热，这在回报中有助于从井中的较大附近的储存。通过电缆加热可以在石蜡中的井筒清洗中是有益的，从石蜡清洗，从而引发来自井筒区域附近的油回收。总水库加热可以提供沉重和超重油的原位升级。

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