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Hydraulic fracturing operation for oil and gas production and associated earthquake activities across the USA
Environmental Earth Sciences ( IF 2.8 ) Pub Date : 2020-05-31 , DOI: 10.1007/s12665-020-09008-0
Valeria Villa , Ramesh P. Singh

Hydraulic fracturing (fracking) operations, associated with horizontal drilling for oil/gas production, are known to induce earthquakes from fluid injection in disposal wells. In recent years, numerous studies have shown a close relationship between induced seismic activities and the high-pressure injection of wastewater, especially in Texas, Kansas, and Oklahoma. Detailed analysis of 17 major fracking locations across the USA has been carried out to study the impact of horizontal wells and the corresponding injected wastewater on earthquake activities. Earthquake data for the period 1998–2018 obtained from the USGS earthquake catalog shows an increase in frequency of earthquakes within a radius of 150 km at fracking locations, prominently in south-central USA. The stimulation of earthquakes depends on the amount of injected water in both horizontal and disposal injected wells, and the geology, hydrological, and geophysical settings nearby the drilling site. The observed seismicity increases with the number of horizontal wells in Texas (correlation R2 = 0.726) and Oklahoma (correlation R2 = 0.636) at the fracking locations.

中文翻译:

美国境内油气生产和相关地震活动的水力压裂作业

已知与水平钻探用于油/气生产相关的水力压裂(压裂)操作会因处置井中的流体注入引起地震。近年来,许多研究表明,诱发地震活动与废水的高压注入之间有着密切的关系,尤其是在德克萨斯州,堪萨斯州和俄克拉荷马州。已对美国17个主要压裂地点进行了详细分析,以研究水平井和相应注入的废水对地震活动的影响。从USGS地震目录获得的1998-2018年期间的地震数据显示,在压裂地区(主要在美国中南部),半径150公里以内的地震频率有所增加。地震的刺激取决于水平注入井和处置注入井中注水量,以及钻探地点附近的地质,水文和地球物理环境。观察到的地震活动性随德克萨斯州水平井数量的增加而增加(相关性R 2  = 0.726)和俄克拉荷马州(相关性R 2  = 0.636)在压裂位置。
更新日期:2020-05-31
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