从地下监测的洞察力,用于在断裂水库中的刺激模式的工程
Nima Gholizadeh Doonechaly1,2, Kai Bröker1,2, Marian Hertrich2
1Center for Hydrogeology and Geothermics (CHYN), University of Neuchâtel, Neuchâtel, Switzerland.
概括
刺激地热水库需要了解复杂的地质学. 这项研究表明压力,压力和自然断裂如何控制地震事件,指导更好的刺激策略,以提高能源生产.
科学领域:
- 地质科学 地质科学
- 地热能源工程 地热能源工程
- 岩石机械学 岩石机械学
背景情况:
- 刺激操作是通过改善流体流动和热传输来提高地热水库性能的关键.
- 由于水库的复杂性和有限的操作数据,难以预测刺激结果.
- 储应力状态,自然结构,压力和注射方法是关键因素.
研究的目的:
- 提供从大规模刺激实验中进行的详细观察.
- 分析地质和地力学因素对刺激结果的影响.
- 确定优化地热水库刺激的关键参数.
主要方法:
- 在Bedretto地下实验室进行了一次公尺度刺激实验.
- 使用密集监测在具有显著超负荷的晶体岩体体积内.
- 分析了与液压连接,压力和地力学有关的地震事件传播模式.
主要成果:
- 液压连接,压力区和现有结构的地力学显著影响地震事件的传播.
- 地震性启动和分布受到区域压力隔离和压力扩散的强烈影响.
- 注射周期之间不同的激活模式表明了刺激策略适应的影响.
结论:
- 调整刺激策略以适应水库的特定地质和地质特征是必不可少的.
- 刺激的空间范围可以受到循环数和注射压力的影响.
- 液压压力和应力状态之间的相互作用对于优化断裂水库刺激至关重要.
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