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Modeling and petrophysical properties of digital rock models with various pore structure types: An improved workflow
International Journal of Coal Science & Technology Pub Date : 2023-10-01 , DOI: 10.1007/s40789-023-00627-z
Xiaobin Li , Wei Wei , Yuxuan Xia , Lei Wang , Jianchao Cai

Pore structure is a crucial factor affecting the physical properties of porous materials, and understanding the mechanisms and laws of these effects is of great significance in the fields of geosciences and petroleum engineering. However, it remains a challenge to accurately understand and quantify the relationship between pore structures and effective properties. This paper improves a workflow to focus on investigating the effect of pore structure on physical properties. First, a hybrid modeling approach combining process-based and morphology-based methods is proposed to reconstruct 3D models with diverse pore structure types. Then, the characteristics and differences in pore structure in these models are compared. Finally, the variation laws and pore-scale mechanisms of the influence of pore structure on physical properties (permeability and elasticity) are discussed based on the reconstructed models. The relationship models between pore structure parameters and permeability/elastic parameters in the grain packing model are established. The effect of pore structure evolution on permeability/elasticity and the microscopic mechanism in three types of morphology-based reconstruction models are explored. The influence degree of pore structure on elastic parameters (bulk modulus, shear modulus, P-wave velocity, and S-wave velocity) is quantified, reaching 29.54%, 51.40%, 18.94%, and 23.18%, respectively. This work forms a workflow for exploring the relationship between pore structures and petrophysical properties at the microscopic scale, providing more ideas and references for understanding the complex physical properties in porous media.



中文翻译:

具有各种孔隙结构类型的数字岩石模型的建模和岩石物理特性:改进的工作流程

孔隙结构是影响多孔材料物理性能的关键因素,了解这些影响的机制和规律对于地球科学和石油工程领域具有重要意义。然而,准确理解和量化孔隙结构与有效性能之间的关系仍然是一个挑战。本文改进了工作流程,重点研究孔隙结构对物理性质的影响。首先,提出了一种结合基于过程和基于形态的方法的混合建模方法来重建具有不同孔隙结构类型的3D模型。然后,比较了这些模型中孔隙结构的特点和差异。最后,基于重构模型,讨论了孔隙结构对物性(渗透率和弹性)影响的变化规律和孔隙尺度机制。建立了颗粒堆积模型中孔隙结构参数与渗透率/弹性参数之间的关系模型。探讨了孔隙结构演化对渗透率/弹性的影响以及三种基于形态的重建模型的微观机制。量化了孔隙结构对弹性参数(体积模量、剪切模量、纵波速度、横波速度)的影响程度,分别达到29.54%、51.40%、18.94%、23.18%。这项工作形成了在微观尺度上探索孔隙结构与岩石物理性质之间关系的工作流程,

更新日期:2023-10-03
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