物理一致的二维到三维孔隙空间合成：1. 严格形态约束下的动态颗粒堆积
Physically Consistent 2D to 3D Pore Space Synthesis: 1. Dynamic Grain Packing Under Strict Morphology Constraints
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中文总结 AI 辅助
本文提出物理一致的二维到三维孔隙合成框架，用动态牛顿沉积替代几何混洗，经两阶段堆积验证，消除XCT伪影，渗透率偏差降低50%，数字孪生优于参考数据。
中文摘要 AI 辅助
多尺度、非均质多孔介质的三维数字重建传统上受限于X射线计算机断层扫描（XCT）的分辨率边界和伪影。本文提出了一种物理一致的二维到三维孔隙空间合成框架，该框架利用高性能刚体力学引擎，以动态牛顿引力沉积取代传统的几何混洗。为遵循严格的物理接触力学、统计二维目标和形态约束，我们开发了一个两阶段动态堆积流水线，将逼真的三维颗粒形状与虚拟子颗粒插入引擎相结合。该框架针对合成和天然岩心基准进行了验证。首先，我们表明我们的体视学积分方程系统地转换尺寸分布；绕过这一反演步骤会在总孔隙度相同的情况下导致渗透率预测出现50%的系统性偏差，并独立改变流动通道拓扑。其次，临时虚拟球体作为建筑占位符，用于稳定大型非平衡溶蚀孔隙，确保重建模型在规定容差内满足目标流动指标。最后，当应用于细粒、弱胶结砂岩时，该工作流程暴露并抑制了系统性XCT伪影，包括幻影内部孔隙。两点相关函数系综表明，水动力学和结构合成的数字孪生在定量上比参考XCT数据集本身更接近未损坏的岩石几何结构。该方法论为高保真多相岩石重建建立了可扩展的基础，并具有向复杂非晶水泥相扩展的潜力。
英文摘要
The 3D digital reconstruction of multi-scale, heterogeneous porous media is traditionally limited by the resolution boundaries and artifacts of X-ray computed tomography (XCT). This paper introduces a physically consistent 2D to 3D pore space synthesis framework that supersedes conventional geometric shuffling with dynamic Newtonian gravitational deposition using a high-performance rigid-body mechanics engine. To honor strict physical contact mechanics, statistical 2D targets, and morphological constraints, we develop a two-stage dynamic packing pipeline that combines realistic 3D grain shapes with a virtual sub-particle insertion engine. The framework is validated against synthetic and natural core benchmarks. First, we show that our stereological integral equation systematically converts size distributions; bypassing this inversion step induces a systematic 50\% deviation in permeability predictions despite identical total porosities, independently altering flow channel topology. Second, temporary virtual spheres serve as architectural placeholders to stabilize large non-equilibrium dissolution voids, ensuring the reconstructed model satisfies target flow metrics within the prescribed tolerance. Finally, when applied to a fine-grained, weakly consolidated sandstone, the workflow exposes and suppresses systematic XCT artifacts, including phantom internal porosity. Ensembles of two-point correlation functions demonstrate that the hydrodynamically and structurally synthesized digital twins quantitatively exhibit closer structural proximity to the uncorrupted rock geometry than the reference XCT dataset itself. This methodology establishes a scalable foundation for high-fidelity multi-phase rock reconstruction, with potential extensions toward complex amorphous cement phases.
发表机构
- Moscow Institute of Physics and Technology（莫斯科物理技术学院）
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