标题： 实验室岩心驱替中捕集效率和相对渗透率对实验方法的敏感性 显示英文标题

标题： Sensitivity of Trapping Efficiency and Relative Permeability to Experimental Methodology in Laboratory Core Flooding

摘要： 理解CO$_2$在地下迁移和捕获对于地质碳储存项目至关重要。传统表征方法采用共注入实验来确定相对渗透率和捕获效率。尽管实验室研究旨在复制储层条件，但共注入实验通常被选择是因为它们能促进稳定流动并减少毛细端效应。这种实验设计选择对测量的岩石物理参数的基本影响仍未得到充分表征。本研究通过共注入和单相注入实验之间的对比分析，专门研究了实验方法如何影响捕获效率和岩心样品上的压力差（用于计算相对渗透率）。我们的结果显示，这些注入技术之间的捕获行为存在显著差异，表明传统上对共注入实验的关注可能会忽略重要的物理流动现象。注射技术之间的差异可以在现场应用中被战略性地利用，以增强地下CO$_2$储存操作中的残余捕获能力。这项工作强调了理解岩心flooding研究中的实验误差的重要性及其提高碳储存效率的潜在应用。 显示英文摘要

摘要： Understanding the migration and trapping of CO$_2$ in the subsurface is vital to geologic carbon storage projects. Traditional characterization methods employ steady-state co-injection experiments to determine relative permeability and trapping efficiency. Although laboratory studies aim to replicate reservoir conditions, co-injection experiments are often selected because they facilitate steady-state flow and reduce capillary end effects. The fundamental influence of this experimental design choice on measured petrophysical parameters remains inadequately characterized. This study presents a comparative analysis between co-injection and single-phase injection experiments, specifically investigating how experimental methodology influences both trapping efficiency and pressure differential across the core sample (which is used to calculate relative permeability). Our results demonstrate significant variations in trapping behavior between these injection techniques, suggesting that the traditional focus on co-injection experiments may overlook important physical flow phenomena. Differences between injection techniques could be strategically exploited in field applications to enhance residual trapping capacity in subsurface CO$_2$ storage operations. This work highlights the importance of understanding experimental artifacts in core flooding studies and their potential applications for improving carbon storage efficiency.