纳米尺度孔的水诱导变化的机制:无水与水性热解的含义
Pengpeng Li1,2,3,4, Shixin Zhou2,3, Quanyou Liu1,5
1Institute of Energy, Peking University, Beijing 100871, China.
Fundamental research
|January 30, 2026
概括
水在热成熟过程中显著影响页岩有机物 (OM) 转化和多孔性. 热水溶解通过提供并促进酸溶解,增强碳化合物生成和孔积,特别是在400°C以上.
科学领域:
- 地质化学 地质化学
- 有机石矿学 有机石矿学
- 沉积地质学 沉积地质学
背景情况:
- 页岩有机物 (OM) 的转化和多孔性演变对于碳化合物产生至关重要.
- 了解热成熟过程中水的作用对于精确的石油系统建模至关重要.
研究的目的:
- 在模拟的热成熟条件下,研究水对有机物转化和岩中纳米尺度孔隙性变化的影响.
- 为了比较无水与水性热解对页岩特性的影响.
主要方法:
- 人工诱导的热成熟实验对来自中国奥尔多斯盆地的7成员的页岩样本进行 (250450 °C72小时).
- 分析使用岩石溶解,低压N2/CO2吸附,富里埃变换红外光谱 (FTIR) 和水溶性有机酸 (WSOAs) 实验.
主要成果:
- 在400°C以上,观察到岩石水平参数,TOC,WSOA和孔积 (PV) 的显著变化.
- 水性热解导致较低的Tmax,较高的S1 (碳化合物生成),与无水性热解相比增加了WSOAs.
- 在400°C以上,水性热解导致光伏因热裂变和有机酸溶解而增加两倍,与在350°C以下的青填充相比.
结论:
- 在页岩热进展过程中,水在加速有机物转化和碳化合物生成方面发挥着至关重要的作用.
- 水的存在显著增强了多孔性演变,特别是在更高的温度下,通过裂和溶解机制.
- 水的条件促进了水溶性有机酸的产生,进一步影响了多孔性的发展.
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