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首页> 外文期刊>Journal of Energy Resources Technology >Characterization of Foamy Oil and Gas/Oil Two-Phase Flow in Porous Media for a Heavy Oil/ Methane System
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Characterization of Foamy Oil and Gas/Oil Two-Phase Flow in Porous Media for a Heavy Oil/ Methane System

机译：稠油/甲烷系统中多孔介质中泡沫油气的两相流动特征

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摘要

In our previous study, a series of experiments had been conducted by applying different pressure depletion rates in a 1 m long sand-pack. In this study, numerical simulation models are built to simulate the lab tests, for both gas/oil production data and pressure distribution along the sand-pack in heavy oil/methane system. Two different simulation models are used: (1) equilibrium black oil model with two sets of gas/oil relative permeability curves; (2) a four-component nonequilibrium kinetic model. Good matching results on production data are obtained by applying black oil model. However, this black oil model cannot be used to match pressure distribution along the sand-pack. This result suggests the description of foamy oil behavior by applying equilibrium black oil model is incomplete. For better characterization, a four-component nonequilibrium kinetic model is developed aiming to match production data and pressure distribution simultaneously. Two reactions are applied in the simulation to capture gas bubbles status. Good matching results for production data and pressure distribution are simultaneously obtained by considering low gas relative permeability and kinetic reactions. Simulation studies indicate that higher pressure drop rate would cause stronger foamy oil flow, but the exceed pressure drop rate could shorten lifetime of foamy oil flow. This work is the first study to match production data and pressure distribution and provides a methodology to characterize foamy oil flow behavior in porous media for a heavy oil/methane system.
机译：在我们之前的研究中，通过在1 m长的沙堆中应用不同的压力消耗率进行了一系列实验。在这项研究中，建立了数值模拟模型来模拟实验室测试，包括重油/甲烷系统中气/油产量数据和沿沙堆的压力分布。使用两种不同的模拟模型：（1）具有两组气/油相对渗透率曲线的平衡黑油模型； （2）四成分非平衡动力学模型。通过使用黑油模型可以在生产数据上获得良好的匹配结果。但是，这种黑油模型不能用于匹配沿沙堆的压力分布。该结果表明通过应用平衡黑油模型对泡沫油行为的描述是不完整的。为了更好地表征，开发了四组分非平衡动力学模型，旨在同时匹配生产数据和压力分布。在模拟中应用了两个反应来捕获气泡状态。考虑到较低的气体相对渗透率和动力学反应，可以同时获得生产数据和压力分布的良好匹配结果。仿真研究表明，较高的压降率会导致泡沫油流更强，但是超过压降率会缩短泡沫油流的寿命。这项工作是匹配生产数据和压力分布的第一项研究，并提供了表征重油/甲烷系统多孔介质中泡沫油流动特性的方法。

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