基于 Derjaguin-Landau-Verwey-Overbeek 理论的多孔介质中非等温流动诱导细颗粒迁移的新模型

IF 2.7 3区 工程技术 Q3 ENGINEERING, CHEMICAL Transport in Porous Media Pub Date : 2024-06-25 DOI:10.1007/s11242-024-02103-x
Xinle Zhai, Kamelia Atefi-Monfared
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引用次数: 0

摘要

地热储层中细小颗粒的原地移动是造成储层岩石渗透性破坏和堵塞的一个关键因素,导致地热强化作业期间油井生产率下降。这种现象是作用在特定细颗粒上的力的机械平衡被打破的结果,其中最重要的是静电力和阻力。这些力会受到流体流速、现场温度或现场流体离子强度变化的影响。在非等温流动的驱动下,细颗粒在多孔介质中迁移的理论研究仍然具有挑战性,需要大量参数来量化特定胶体颗粒-孔隙流体-固体颗粒系统的特征。要确定所有相关参数,往往需要进行昂贵、复杂和耗时的物理实验。此外,实施通常用于评估静电力变化的 Derjaguin-Landau-Verwey-Overbeek (DLVO)理论的完整形式非常复杂,计算要求高,而且不切实际,尤其是在应用于评估储层尺度的细粒迁移时。本研究提出了一个理论框架,用于准确、实用地预测粘土-NaCl-石英体系中由非等温流动驱动的细颗粒迁移。本研究的新贡献有两方面。首先,基于完整的 DLVO 理论建立了一个新的数值模型,该模型首次综合了热负荷和水力负荷对所有基本参数(包括孔隙流体的静态介电常数和折射率)的影响。其次,引入了基于 DLVO 的创新简化模型,与现有模型相比,所需参数明显减少,从而提供了实用高效的解决方案。利用所提出的模型,可对细颗粒析出的基本机制进行全面评估。研究结果对预测细颗粒迁移引起的地热储层渗透率破坏至关重要,有助于实现能源储存/生产作业的可持续设计,并制定有效战略,及时防止或缓解油井生产率的下降。
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Novel Modeling of Non-Isothermal Flow-Induced Fine Particle Migration in Porous Media Based on the Derjaguin-Landau-Verwey-Overbeek Theory

Mobilization of in situ fine particles in geothermal reservoirs is a key contributor to permeability damage and clogging of the reservoir rock, leading to a decline in well productivity during enhanced geothermal operations. This phenomenon is a result of disturbance in the mechanical equilibrium of the forces acting on a given fine particle, most significant of which are electrostatic and drag forces. These forces are affected by changes in fluid flow velocities, in situ temperatures, or ionic strength of in situ fluids. Theoretical formulation of migration of fine particles in porous media driven by non-isothermal flow remains challenging, and requires a considerable number of parameters to quantify the characteristics of a given colloidal particle-pore fluid–solid grain system. The identification of all the involved parameters often necessitates costly, intricate, and time-consuming physical experiments. Moreover, implementing the complete form of the Derjaguin-Landau-Verwey-Overbeek (DLVO) theory, commonly adopted to evaluate changes in electrostatic forces, is complicated, computationally demanding, and impractical, particularly when applied to evaluate fines migration at a reservoir scale. This study presents a theoretical framework for accurate and practical prediction of fine particle migration driven by non-isothermal flow in a clay-NaCl-quartz system. The novel contributions of this study are twofold. Firstly, a new numerical model is developed based on the complete DLVO theory, which integrates for the first time the effects of both thermal and hydraulic loads on all underlying parameters including both the static dielectric constant and the refractive index of the pore fluid. Secondly, an innovative simplified DLVO-based model has been introduced, requiring notably fewer parameters compared to existing models, thus offering a practical and efficient solution. The proposed models are utilized to conduct a comprehensive assessment of the fundamental mechanisms involved in fine particle liberation. Findings are key to predict fines-migration-induced permeability damage in geothermal reservoirs to achieve a sustainable design of energy storage/production operations as well as to develop effective strategies to prevent or mitigate the decline in well productivity in time.

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来源期刊
Transport in Porous Media
Transport in Porous Media 工程技术-工程:化工
CiteScore
5.30
自引率
7.40%
发文量
155
审稿时长
4.2 months
期刊介绍: -Publishes original research on physical, chemical, and biological aspects of transport in porous media- Papers on porous media research may originate in various areas of physics, chemistry, biology, natural or materials science, and engineering (chemical, civil, agricultural, petroleum, environmental, electrical, and mechanical engineering)- Emphasizes theory, (numerical) modelling, laboratory work, and non-routine applications- Publishes work of a fundamental nature, of interest to a wide readership, that provides novel insight into porous media processes- Expanded in 2007 from 12 to 15 issues per year. Transport in Porous Media publishes original research on physical and chemical aspects of transport phenomena in rigid and deformable porous media. These phenomena, occurring in single and multiphase flow in porous domains, can be governed by extensive quantities such as mass of a fluid phase, mass of component of a phase, momentum, or energy. Moreover, porous medium deformations can be induced by the transport phenomena, by chemical and electro-chemical activities such as swelling, or by external loading through forces and displacements. These porous media phenomena may be studied by researchers from various areas of physics, chemistry, biology, natural or materials science, and engineering (chemical, civil, agricultural, petroleum, environmental, electrical, and mechanical engineering).
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