| 重庆荣昌诱发地震区精细速度结构及2010年ML5.1地震序列精确定位 |
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| 引用本文： | 王小龙,马胜利,雷兴林,郭欣,王强,余国政,勾宪斌,桑原保人,今西和俊,蒋霞东.重庆荣昌诱发地震区精细速度结构及2010年ML5.1地震序列精确定位[J].中国地震研究,2012,26(4):467-478. |
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| 作者姓名： | 王小龙 马胜利 雷兴林 郭欣 王强 余国政 勾宪斌 桑原保人 今西和俊 蒋霞东 |
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| 作者单位： | 1)重庆市地震局,重庆 401147; 2)中国地震局地质研究所,地震动力学国家重点实验室,北京 100029;2)中国地震局地质研究所,地震动力学国家重点实验室,北京 100029;2)中国地震局地质研究所,地震动力学国家重点实验室,北京 100029; 3)日本地质调查所,筑波305-8567;1)重庆市地震局,重庆 401147;1)重庆市地震局,重庆 401147;1)重庆市地震局,重庆 401147;1)重庆市地震局,重庆 401147;3)日本地质调查所,筑波305-8567;3)日本地质调查所,筑波305-8567;4)河海大学常州校区,江苏常州 213022 |
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| 基金项目： | supported by the grants of Spark Program of China Earthquake Administration ( XH12038Y );the State Key Laboratory of Earthquake Dynamic( LED2008B04);Science and Technology Program of Chongqing Municipality in 2011 (Grant No. CSTC,2011AC0149);Research on the New Pattern and Key Techniques of the Earthquake Emergency Decision in Southwest China (201108013) |
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| 摘 要： | Based on data collected from a temporal seismic network, and in addition to the data from some nearby permanent stations, we investigate the velocity structure and seismicity in the Rongchang gas field, where significant injection-induced seismicity has been identified. First, we use receiver functions from distant earthquakes to invert detailed 1-D velocity structures beneath typical stations. Then, we use the double-difference hypocenter location method to re-locate earthquakes of the 2010 ML5.1 earthquake sequence that occurred in the region. The re-located hypocenters show that the 2010 ML5.1 earthquake sequence was distributed in a small area surrounding major injection wells and clustered mostly along pre-existing faults. Major earthquakes show a focal depth less than 5km with a dominant depth of ～2km, a depth of major reservoirs and injection wells. We thus conclude that the 2010 ML 5.1 earthquake sequence might have been induced by the deep well injection of unwanted water at a depth ～3km in the Rongchang gas field.
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| 关 键 词： | Induced earthquake Receiver function Double difference location Rongchang |
| 收稿时间： | 2011/3/15 0:00:00 |
| 修稿时间： | 2012/4/21 0:00:00 |
Fine Velocity Structure and Relocation of the 2010 ML5.1 Earthquake Sequence in Rongchang Gas Field |
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| Wang Xiaolong,Ma Shengli,Lei Xinglin,Guo Xin,Wang Qiang,Yu Guozheng,Gou Xianbin,Kuwahara Yasuto,Imanishi Kazutoshi and Jiang Xiadong.Fine Velocity Structure and Relocation of the 2010 ML5.1 Earthquake Sequence in Rongchang Gas Field[J].Earthquake Research in China,2012,26(4):467-478. |
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| Authors: | Wang Xiaolong Ma Shengli Lei Xinglin Guo Xin Wang Qiang Yu Guozheng Gou Xianbin Kuwahara Yasuto Imanishi Kazutoshi and Jiang Xiadong |
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| Institution: | Key Laboratory of Earthquake Dynamics, Institute of Geology, CEA, Beijing 100029, China 3) Geological Survey of Japan, Tsukuba 305～8567, Japan 4) Hohai University, Changzhou, Changzhou 213022, China |
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| Abstract: | Based on data collected from a temporal seismic network, and in addition to the data from some nearby permanent stations, we investigate the velocity structure and seismicity in the Rongchang gas field, where significant injection-induced seismicity has been identified. First, we use receiver functions from distant earthquakes to invert detailed 1-D velocity structures beneath typical stations. Then, we use the double-difference hypocenter location method to re-locate earthquakes of the 2010 ML5.1 earthquake sequence that occurred in the region. The re-located hypocenters show that the 2010 ML5.1 earthquake sequence was distributed in a small area surrounding major injection wells and clustered mostly along pre-existing faults. Major earthquakes show a focal depth less than 5km with a dominant depth of ~2km, a depth of major reservoirs and injection wells. We thus conclude that the 2010 ML 5.1 earthquake sequence might have been induced by the deep well injection of unwanted water at a depth ~3km in Rongchang gas field. |
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| Keywords: | Induced earthquake Receiver function Double difference location Rongchang |
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