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热干岩中的流量和热传递通道的渐进进化进化受液冷冲击刺激
Yong Sun1, Long Feng1, Hongrui Xu1
1School of Low Carbon Energy and Power Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China.
ACS omega
|January 1, 2025
概括
液冷冲击有效地折断热干岩 (HDR) 以提高地热能源的提取. 周期性冲击会产生复杂的断裂网络,显著改善深层热水库的透和流量.
科学领域:
- 地热能源 地热能源
- 材料科学 材料科学 材料科学
- 岩石机械学 岩石机械学
背景情况:
- 热干岩 (HDR) 是一个有前途的低碳能源.
- 储刺激需要有效地创建断裂通道.
- 传统的液压压裂在HDR方面存在局限性.
研究的目的:
- 为了研究液冷冲击对HDR储刺激的有效性.
- 分析周期性冷冲击下的温度,应力和断裂网络的演变.
主要方法:
- 在不同温度下将热岩石置于循环液冷冲击下.
- 分析温度场,热应力,孔隙断裂发展和漏网络的级联演变.
主要成果:
- 液诱导的指数级核心温度下降与局部波动.
- 辐射热应力随温度的增加而增加,波速在初始冲击后和在更高的温度下显著下降.
- 显微孔进化在不同温度范围内显示出不同的模式,导致骨折发育和连接性增加.
- 在代表性的基本体积中,流速和速率大幅增加.
结论:
- 液冷冲击有效地在HDR中创建复杂的断裂网络.
- 周期性冲击加剧了应力度,降低了损伤值,促进了持续的孔隙断裂通道的发展.
- 这种方法为增强HDR地热能提取提供了一种可行的方法.
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