Effect of heterogeneity and injection rates on the recovery of oil from conventional sand packs: A simulation approach

Q1 Earth and Planetary Sciences
Anurag Pandey , Himanshu Kesarwani , Amit Saxena , Reza Azin , Shivanjali Sharma
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引用次数: 8

Abstract

The study of flow through porous media has been of cardinal gravity in oil and gas applications like enhanced oil recovery (EOR), acidizing, fracturing, etc. One of the most anticipated apprehensions is that the core flooding and simulation have become prevalent to understand the flow through porous media. This study aims at simulating and analyzing the effect of alkaline surfactant flooding through heterogeneous permeability conditions in the lab-scale methods. The conventional methods of core flood deal with the effective permeability of the system without considering the effect of heterogeneity within the core. The heterogeneous studies are conducted by simulating a finely meshed 2-D axisymmetric model of the sand pack. The novel Karanj oil surfactant extracted from Pongamia Pinnata, and partially hydrolyzed polyacryl amide polymer are considered for the physicochemical properties of displacing fluid used in the simulations. Different heterogeneity combinations and displacing fluid injection flow rates are introduced for a single absolute permeability system. Results indicate a trend of oil recovery upright with increasing vertical permeability. A lower areal sweep efficiency and early breakthrough are observed in models with high horizontal permeabilities. Further, the effect of heterogeneity on oil recovery is reduced with the increase in injection flow rates of displacing fluid. The present work utilizes computational fluid dynamics to model multiphase flow through a heterogeneous permeability media and its effect on oil recovery.

非均质性和注入速率对常规砂包采收率的影响:模拟方法
对多孔介质流动的研究在提高采收率(EOR)、酸化、压裂等油气应用中具有重要意义。最令人担忧的问题之一是,岩心驱油和模拟已成为了解多孔介质流动情况的主流。本研究旨在通过实验室规模的方法模拟和分析非均质渗透率条件下碱性表面活性剂驱油的效果。传统的岩心驱替方法处理系统的有效渗透率,而不考虑岩心内部非均质性的影响。非均质研究是通过模拟一个精细网格的二维轴对称沙组模型进行的。针对模拟中使用的驱替液的物理化学性质,考虑了从Pongamia Pinnata中提取的新型Karanj油表面活性剂和部分水解的聚丙烯酰胺聚合物。针对单个绝对渗透率系统,介绍了不同的非均质性组合和驱替液注入流速。结果表明,随着垂直渗透率的增加,原油采收率呈上升趋势。在具有高水平渗透率的模型中观察到较低的面积扫描效率和早期突破。此外,随着驱替液注入流量的增加,非均质性对采收率的影响减小。本工作利用计算流体动力学来模拟通过非均质渗透率介质的多相流及其对石油采收率的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Petroleum Research
Petroleum Research Earth and Planetary Sciences-Geology
CiteScore
7.10
自引率
0.00%
发文量
90
审稿时长
35 weeks
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