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首页> 外文期刊>Seismological research letters >Earthquakes in Northwest Louisiana and the Texas-Louisiana Border Possibly Induced by Energy Resource Activities within the Haynesville Shale Play
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Earthquakes in Northwest Louisiana and the Texas-Louisiana Border Possibly Induced by Energy Resource Activities within the Haynesville Shale Play

机译：海恩斯维尔页岩气田中的能源活动可能诱发了路易斯安那州西北部和得克萨斯州与路易斯安那州边境的地震

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We utilize Transportable Array data to survey regional seismicity in east Texas and northwest Louisiana. Through analyst review and a waveform-matching technique, we identify 58 earthquakes occurring between April 2010 and July 2012. The earthquakes spatially cluster within two main zones, near Timpson, Texas, and within Bienville Parish, Louisiana; minor clusters occur in the Texas-Louisiana border region. Although the Timpson earthquakes have been studied previously, we identify many undetected earthquakes that occurred in 2010, about two years prior to the 17 May 2012 M-w 4.8 earthquake, which has been linked to wastewater injection. The Bienville Parish sequence, which consists of magnitude 0.5-1.9 earthquakes in mid- to late-2011, occurred about 10 km from wells that began injecting at relatively modest rates (similar to 40,000 barrels (bbl) per month) in late 2010 but within a few kilometers of production wells that were being hydraulically fractured around the same time period. An additional cluster of seismicity was observed, near Center, Texas, with some seismicity occurring in the months prior to the start of wastewater injection and the largest earthquake in that sequence occurring when injection exceeded 200; 000 bbl/month; this may be a case in which injection into a seismically active area promoted a larger earthquake. Finally, there was also seismicity observed near the Toledo Bend Reservoir in Louisiana. The evidence concerning some of the sequences indicates they might be associated with either hydraulic fracturing or recent increases in wastewater injection at wells within the unconventional Haynesville shale gas play. The results of this study highlight the need for more extensive seismic monitoring in the central and eastern regions of the United States of America.
机译：我们利用可移动阵列数据来调查德克萨斯州东部和路易斯安那州西北部的区域地震活动。通过分析人员的审查和波形匹配技术，我们确定了2010年4月至2012年7月之间发生的58场地震。该地震在空间上聚集在德克萨斯州廷普森附近和路易斯安那州比恩维尔教区两个主要区域内。德克萨斯-路易斯安那边境地区出现小群。尽管以前曾对Timpson地震进行过研究，但我们确定了许多未发现的地震，发生在2010年，大约是2012年5月17日M-w 4.8地震的两年，该地震与废水注入有关。 Bienville教区序列由2011年年中至后期的0.5-1.9级地震构成，距2010年末开始以相对适度的速率注入井（约每月40,000桶）的井约10 km，但在在同一时间段内几口被水力压裂的生产井。在得克萨斯州中心附近还观察到了另外的地震活动，在开始注入废水之前的几个月中发生了一些地震活动，当注入量超过200时，发生了最大的地震活动。 000桶/月;在这种情况下，向地震活跃区域注入会引发更大的地震。最后，在路易斯安那州的托莱多弯水库附近也观察到地震活动。有关某些序列的证据表明，它们可能与水力压裂或非常规海恩斯维尔页岩气井内井中废水注入的近期增加有关。这项研究的结果强调了在美国中部和东部地区需要进行更广泛的地震监测。

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