Recent developments in the densification of the seismic network covering the Groningen gas field allow a more detailed study of the connection between induced seismicity and reactivated faults around the gas reservoir at 3 km depth. With the reduction of the average station distance from 20 km to 4–5 km, a probabilistic full‐waveform moment tensor inversion procedure could be applied, resulting in both improved hypocenter location accuracy and full moment tensor solutions for events of M≥2.0 recorded in the period 2016–2019. Hypocenter locations as output from the moment tensor inversion are compared to locations from the application of other methods and are found similar within 250 m distance. Moment tensor results show that the double‐couple (DC) solutions are in accordance with the known structure, namely normal faulting along 50°–70° dipping faults. Comparison with reprocessed 3D seismic sections, extended to a depth of 6–7 km, demonstrate that (a) most events occur along faults with a small throw and (b) reactivated faults in the reservoir often continue downward in the Carboniferous underburden. From non‐DC contributions, the isotropic (ISO) component is dominant and shows consistent negative values, which is expected in a compacting medium. There is some indication that events connected to faults with a large throw (⁠>70 m⁠) exhibit the largest ISO component (40%–50%).

中文翻译：

---

荷兰格罗宁根气田的烃诱发地震概率矩张量反演，第2部分：应用

覆盖格罗宁根气田的地震网络致密化的最新进展，使得可以对3 km深度的气藏周围的诱发地震活动性和再活化断层之间的联系进行更详细的研究。随着平均站距从20 km减少到4-5 km，可以采用概率全波形矩张量反演程序，从而提高了震中位置精度和M≥2.0记录的全矩张量解。 2016-2019年期间。将张量反演的输出作为震源位置与应用其他方法得到的震源位置进行了比较，发现距离在250 m以内。矩张量结果表明，双耦合（DC）解符合已知结构，即沿着50°–70°倾角断层的正常断层。与再处理的3D地震剖面（延伸至6-7 km深度）的比较表明，（a）大多数事件发生在断层较小的断层上，并且（b）储层中重新活化的断层通常在石炭系下层继续向下。从非DC贡献来看，各向同性（ISO）分量占主导地位，并显示出一致的负值，这在压实介质中是可以预期的。有迹象表明，与大故障（⁠> 70m⁠）故障相关的事件表现出最大的ISO分量（40％–50％）。从非DC贡献来看，各向同性（ISO）分量占主导地位，并显示出一致的负值，这在压实介质中是可以预期的。有迹象表明，与大故障（⁠> 70m⁠）故障相关的事件表现出最大的ISO分量（40％–50％）。从非DC贡献来看，各向同性（ISO）分量占主导地位，并显示出一致的负值，这在压实介质中是可以预期的。有迹象表明，与大故障（⁠> 70m⁠）故障相关的事件表现出最大的ISO分量（40％–50％）。