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注射诱导的缓慢滑动事件的最大大小和幅度
Alexis Sáez1, François Passelègue2, Brice Lecampion1
1Geo-Energy Lab - Gaznat Chair, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
Science advances
|May 7, 2025
概括
液体注射可能会导致缓慢的滑动事件,可能会触发远离注射地点的地震. 这项研究提供了缩放关系,以预测这些无地震断裂的最大大小和幅度,这对于地震危险评估至关重要.
科学领域:
- 地质物理学 地质物理学
- 地震科学 地震科学 地震科学
- 流体动力学 流体动力学
背景情况:
- 液体注射可以诱导无地震滑动,导致迅速传播的应力变化.
- 这些应力变化可以在超过孔隙压力扩散率的距离上触发地震性.
- 了解无地震断裂的程度对于在注入井附近的地震危险评估至关重要.
研究的目的:
- 导出由液体注射引起的无地震破裂的最大大小的缩放关系.
- 在液体注入操作过程中,为无地震滑动事件的最大幅度开发一个缩放关系.
- 确定控制注射诱导的缓慢滑动事件的大小和幅度的关键因素.
主要方法:
- 基于破裂物理学的理论缩放关系的推导.
- 随意注入液体的流量率历史记录的会计.
- 理论预测与各种尺度的观测数据的比较.
主要成果:
- 为无地震断裂的最大大小得出了一个缩放关系.
- 建立了一个对无地震滑动事件最大幅度的缩放关系.
- 理论预测与实验室和现实世界观测结果一致.
结论:
- 断层区域存储率,背景应力变化和注射液体体积是关键决定因素.
- 这些因素控制了注射诱导的慢滑事件的最大大小和幅度.
- 由此得出的缩放关系增强了对与液体注射相关的地震危害的理解.
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