在高温下使用液在花岩上的低温破裂:哈萨克斯坦增强地热系统的案例研究
Sotirios Nik Longinos1, Randy Hazlett2
1Department of Petroleum Engineering, School of Mining and Geosciences, Nazarbayev University, Astana, Kazakhstan. s.n.longinos@gmail.com.
Scientific reports
|January 3, 2024
概括
使用液 (LN2) 的低温破裂通过提高岩石透性来增强地热能源的提取. 用LN2处理的热花岩显示裂变的增加,其有效性随温度和处理周期的增加而增加.
科学领域:
- 地质科学 地质科学
- 材料科学 材料科学 材料科学
- 能源工程 能源工程
背景情况:
- 地下形成需要刺激,以便有效地提取地热能.
- 使用液 (LN2) 的冷裂解是一种新兴的技术,用于增强岩石性能.
研究的目的:
- 通过使用LN2.2,研究初始温度对花岩冷破裂的影响.
- 在不同温度下LN2处理后,量化花岩的地力学变化.
- 评估LN2破裂对地热能刺激的潜力.
主要方法:
- 来自南哈萨克斯坦的花岩芯在100至500°C的温度下保持平衡.
- 样品用液 (LN2) 处理,暴露时间和周期各不相同.
- 进行了压缩,巴西和断裂性测试,以评估机械性能.
主要成果:
- 热花岩的LN2冷却引发了机械岩石破裂和增强的透性.
- 碎裂程度随着花岩的初始温度,结时间和结解周期的增加而增加.
- 压缩和巴西测试中的峰值负载随着温度差异和LN2治疗持续时间的增加而减少.
结论:
- 使用LN2的冷裂解有效地刺激花岩,改善孔隙性和透性.
- 较高的初始温度和更多的处理周期导致更大的断裂.
- 在地热作业中,用于最佳的LN2刺激,应有300°C以上的下孔温度值.
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