非等温条件下多孔介质中原油多相流的组分数值分析

IF 1.6 4区 工程技术 Q3 Chemical Engineering
Srinivasa Reddy Devarapu, Tapas Kumar Dora Dau, Vamsi Krishna Kudapa, S. Govindarajan
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引用次数: 0

摘要

摘要:本文详细介绍了非等温条件下多孔储层系统中重烃流动的成分模型的发展。该数学模型考虑了描述多相烃体系中分布的自然变量反应的质量和能量守恒方程。这种基于自然变量的组合模型更适合完全隐式数值格式,且雅可比矩阵计算成本低。此外,该模型适应了一个阶段消失和再现的主要变量的切换。所得到的非线性守恒方程采用块中心有限差分格式进行数值离散,并采用基于准牛顿的隐式迭代求解器进行求解。利用文献中稠油燃烧过程多相流热剖面对模型进行了验证,其性能系数r2、平均绝对误差MBE和最大绝对百分比误差MAPE分别为0.954、0.37和0.01左右。所开发的成分模型预测,在最高温度或峰值温度约为798 K的160天内,轻质和稠油的采收率分别为26%和72% %。此外,还介绍了通过对各种运行参数的敏感性分析所预测的热产曲线。值得注意的是,本文的工作有助于为有效的能源勘探提供一种经济的基于数值的工具来评估地下或原位燃烧过程中的流动和输送。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Compositional numerical analysis of multiphase flow of crude oil in porous media under non-isothermal conditions
Abstract The present work details the development of a compositional model to replicate the heavy hydrocarbon flow in porous reservoir systems under non-isothermal conditions. The mathematical model considers mass and energy conservation equations describing the reactive of natural variables distributed in a multiphase hydrocarbon system. Such natural variable based compositional models better suit fully implicit numerical schemes with inexpensive Jacobian matrix computations. Further, the model accommodates a switch of primary variables for the disappearance and reappearance of a phase. The resulting nonlinear conservation equations are numerically discretized using a block-centered finite-difference scheme and solved with a quasi-Newton based implicit iterative solver. The present model is validated with the thermal profiles presented in the literature for the multiphase flow during the combustion of heavy crude oil in petroleum reservoir system with performance coefficient (R 2), mean absolute error (MBE), and maximum absolute percentage error (MAPE) of about 0.954, 0.37, and 0.01 respectively. The developed compositional model projected 26 and 72 % of light and heavy oil recoveries respectively in about 160 days with a maximum or peak temperature of about 798 K. Further, the thermal and production profiles projected by the sensitivity analysis on various operating parameters are presented. It is noteworthy that the present works aid in providing an economical numerical based tool in evaluating the flow and transport during underground or in-situ combustion process for efficient energy exploration.
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来源期刊
CiteScore
2.80
自引率
12.50%
发文量
107
审稿时长
3 months
期刊介绍: The International Journal of Chemical Reactor Engineering covers the broad fields of theoretical and applied reactor engineering. The IJCRE covers topics drawn from the substantial areas of overlap between catalysis, reaction and reactor engineering. The journal is presently edited by Hugo de Lasa and Charles Xu, counting with an impressive list of Editorial Board leading specialists in chemical reactor engineering. Authors include notable international professors and R&D industry leaders.
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