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首页> 外文期刊>Seismological research letters >Hydraulic Fracturing and Seismicity in the Western Canada Sedimentary Basin
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Hydraulic Fracturing and Seismicity in the Western Canada Sedimentary Basin

机译：加拿大西部沉积盆地的水力压裂和地震活动

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摘要

The development of most unconventional oil and gas resources relies upon subsurface injection of very large volumes of fluids, which can induce earthquakes by activating slip on a nearby fault. During the last 5 years, accelerated oilfield fluid injection has led to a sharp increase in the rate of earthquakes in some parts of North America. In the central United States, most induced seismicity is linked to deep disposal of coproduced wastewater from oil and gas extraction. In contrast, in western Canada most recent cases of induced seismicity are highly correlated in time and space with hydraulic fracturing, during which fluids are injected under high pressure during well completion to induce localized fracturing of rock. Furthermore, it appears that the maximum-observed magnitude of events associated with hydraulic fracturing may exceed the predictions of an often-cited relationship between the volume of injected fluid and the maximum expected magnitude. These findings have far-reaching implications for assessment of induced-seismicity hazards.
机译：大多数非常规油气资源的开发依赖于地下大量注水的注入，这可能通过激活附近断层上的滑动而诱发地震。在过去的五年中，加速注入油田的流体导致北美某些地区的地震发生率急剧上升。在美国中部，大多数诱发地震活动与对石油和天然气开采产生的联产废水的深度处理有关。相反，在加拿大西部，最新的地震诱发案例在时间和空间上与水力压裂高度相关，在水力压裂期间，在完井过程中在高压下注入流体以引起岩石的局部压裂。此外，似乎与水力压裂有关的事件的最大观测值可能会超出对注入流体量与最大预期值之间经常被引用的关系的预测。这些发现对诱发地震危害的评估具有深远的意义。

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