使用电岩物理模型模拟甲吸附和脱附过程中煤电阻力动态的模拟
Jiaqi Zou1, Shuangquan Chen2, Yuanji Li3
1National Key Laboratory of Petroleum Resources and Engineering, CNPC Key Laboratory of Geophysical Exploration, China University of Petroleum (Beijing), Beijing, 102249, China.
Scientific reports
|July 17, 2025
概括
这项研究引入了一种新的电气岩石物理模型,以根据甲含量预测煤炭电阻. 该模型准确地模拟了甲吸附和脱附过程中的电阻变化,这对于煤床甲回收和安全至关重要.
科学领域:
- 地质物理学 地质物理学
- 岩石物理 岩石物理
- 石油工程是石油工程中的一个.
背景情况:
- 准确预测煤电阻对于煤床甲 (CBM) 提取和矿山安全至关重要.
- 现有的实证模型缺乏对在甲吸附/脱附过程中电阻变化的机制性理解.
研究的目的:
- 开发一个双系数的电岩物理模型来预测煤电阻.
- 将无机矿物学,有机物质,甲吸附和孔隙结构整合到模型中.
- 通过实验数据验证模型的预测能力.
主要方法:
- 开发了一种双系数电气岩石物理模型,其中包括矿物成分,有机电阻力和甲吸附-脱落.
- 引入了吸附异质性和结构复杂性的校正系数.
- 使用煤样本实验验证了该模型,测量了甲吸附和脱附过程中的电阻.
主要成果:
- 该模型与吸附 (R2=0.9815) 和脱吸 (R2=0.9956) 期间的实验电阻数据有很强的一致性.
- 灵敏度分析显示,矿物质成分和包含形状显著影响电阻.
- 有机含量与电阻相反相关,在有机分数较高时,孔隙结构效应会减小.
结论:
- 开发的模型为了解煤电阻提供了一个强大的,以物理为导向的框架.
- 这项研究为CBM资源评估,二氧化碳封存监测和矿山危险管理提供了预测工具.
- 该模型对各种煤炭类型的适应性提高了其在工业和研究中的适用性.
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