Visualizing conformance control mechanisms in high-temperature reservoirs: a microfluidic analysis of Pickering emulsified gel systems

IF 2.3 4区 工程技术 Q2 INSTRUMENTS & INSTRUMENTATION Microfluidics and Nanofluidics Pub Date : 2024-10-12 DOI:10.1007/s10404-024-02770-8
Tinku Saikia, Lucas Mejia, Abdullah Sultan, Matthew Balhoff, Jafar Al Hamad
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Abstract

In the context of mature oil fields, the management of water production stands out as a formidable challenge. Our prior research endeavors (Saikia et al. J Pet Sci Eng 2020, ACS Omega 2021) have introduced an innovative Pickering emulsified gel system tailored for the precise adjustment of relative permeability in high-temperature reservoirs. To make this system work better, it is required to fully understand how it controls water flow. Traditionally, conformance control studies rely on data from core flooding tests, CT scans, and nuclear magnetic resonance (NMR) techniques, among other methods. However, these traditional approaches often struggle to provide real-time visual data, which limits their accuracy in predicting how conformance mechanisms actually work. In our research study, using two distinct glass micromodels (Micromodel I-water-wet and Micromodel II-oil-wet), we conducted Pickering emulsified gel treatments at 105 °C. Microfluidic analysis revealed that the emulsion enters the pore space as slugs, coalescing during injection. The subsequent gelation of the aqueous phase restricts water flow, while oil preferentially flows through specific channels created by the separated oleic phase. These findings challenge the previously proposed Thin Film mechanism, suggesting instead a Relative Permeability Modified Channel Flow. This research provides a deeper understanding of the Pickering emulsified gel system’s conformance control mechanism, highlighting its potential for managing water production in high-temperature reservoirs.

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高温储层中一致性控制机制的可视化:对皮克林乳化凝胶系统的微流体分析
在成熟油田中,产水量管理是一项艰巨的挑战。我们之前的研究工作(Saikia 等人,J Pet Sci Eng 2020,ACS Omega 2021)引入了一种创新的皮克林乳化凝胶系统,专门用于精确调节高温油藏的相对渗透率。为了让这一系统更好地工作,需要充分了解它是如何控制水流的。传统的一致性控制研究依赖于岩心水浸测试、CT 扫描和核磁共振(NMR)技术等方法获得的数据。然而,这些传统方法往往难以提供实时可视数据,这限制了它们预测一致性机制如何实际运作的准确性。在我们的研究中,我们使用两种不同的玻璃微模型(Micromodel I-水-湿和Micromodel II-油-湿),在105 °C下进行了皮克林乳化凝胶处理。微流体分析表明,乳液以蛞蝓形式进入孔隙,并在注入过程中凝聚。水相随后的凝胶化限制了水的流动,而油则优先流经由分离的油酸相形成的特定通道。这些发现对之前提出的薄膜机制提出了质疑,并提出了相对渗透性修正通道流。这项研究加深了对皮克林乳化凝胶系统一致性控制机制的理解,突出了其在管理高温油藏产水量方面的潜力。
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来源期刊
Microfluidics and Nanofluidics
Microfluidics and Nanofluidics 工程技术-纳米科技
CiteScore
4.80
自引率
3.60%
发文量
97
审稿时长
2 months
期刊介绍: Microfluidics and Nanofluidics is an international peer-reviewed journal that aims to publish papers in all aspects of microfluidics, nanofluidics and lab-on-a-chip science and technology. The objectives of the journal are to (1) provide an overview of the current state of the research and development in microfluidics, nanofluidics and lab-on-a-chip devices, (2) improve the fundamental understanding of microfluidic and nanofluidic phenomena, and (3) discuss applications of microfluidics, nanofluidics and lab-on-a-chip devices. Topics covered in this journal include: 1.000 Fundamental principles of micro- and nanoscale phenomena like, flow, mass transport and reactions 3.000 Theoretical models and numerical simulation with experimental and/or analytical proof 4.000 Novel measurement & characterization technologies 5.000 Devices (actuators and sensors) 6.000 New unit-operations for dedicated microfluidic platforms 7.000 Lab-on-a-Chip applications 8.000 Microfabrication technologies and materials Please note, Microfluidics and Nanofluidics does not publish manuscripts studying pure microscale heat transfer since there are many journals that cover this field of research (Journal of Heat Transfer, Journal of Heat and Mass Transfer, Journal of Heat and Fluid Flow, etc.).
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