张卓然^1,,
魏斌²,
申宗航¹,
乌尼尔²,
王涛¹,
王宝善³,
阮友谊^1,,
1. 南京大学地球科学与工程学院, 南京 210023
2. 新疆维吾尔自治区地震局, 乌鲁木齐 830011
3. 中国科学技术大学地球和空间科学学院, 合肥 230026

基金项目: 国家重点基础研究发展规划项目（2018YFC1503202）资助


详细信息

作者简介: 张卓然, 男, 1997年生, 在读研究生, 主要从事微震检测与面波层析成像研究.E-mail:ranor@smail.nju.edu.cn

通讯作者: 阮友谊, 男, 1982年生, 副教授, 主要从事高性能计算和层析成像研究.E-mail:youyir@nju.edu.cn

中图分类号: P315

收稿日期:2020-04-12
修回日期:2020-07-16
上线日期:2020-09-05

Effects of the Hutubi underground gas storage in 2016 on the surrounding seismic activities

ZHANG ZhuoRan^1,,
WEI Bin²,
SHEN ZongHang¹,
Wunier²,
WANG Tao¹,
WANG BaoShan³,
RUAN YouYi^1,,
1. School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, China
2. Earthquake Administration of Xinjiang Uygur Autonomous Region, Vrümqi 830011, China
3. School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China


More Information

Corresponding author: RUAN YouYi,E-mail:youyir@nju.edu.cn

MSC: P315

--> Received Date: 12 April 2020
Revised Date: 16 July 2020
Available Online: 05 September 2020


摘要
摘要:呼图壁储气库是中国目前存储量最大的天然气储气库，位于新疆准噶尔盆地南缘，北天山山前坳陷带内的呼图壁背斜上.储气库靠近百万人口大城市乌鲁木齐，气库的注放气活动对其周缘地震活动的长期影响是事关生产和生活的重要安全问题.本文以呼图壁储气库为中心，在86.5°E—87.5°E，43.5°N—44.5°N的范围内，基于新疆维吾尔自治区地震局在该区域建立的密集流动台阵数据，应用模板匹配滤波技术对2016年全年的波形数据进行搜索识别，检测到遗漏地震事件151个，完善扩充了原有地震目录，使得该区域完备震级由1.1降到约0.7.通过分析新目录中404个地震的时空分布规律，我们发现2016年，即气库建成第三年以后，储气库的气压变化依然会影响周缘地区的地震活动.当储气库的气压增大到超过约22 MPa的阈值后，较小的气压波动也会导致该区域地震活动性明显增强；气压变化对距储气库中心最远约40 km范围内区域的地震活动存在较为明显的影响.
关键词: 呼图壁储气库/
诱发地震/
模板匹配滤波

Abstract:The Hutubi underground gas storage (HUGS) is the largest of its kind so far in China, it is located in the front of the northern Tianshan depression and the southern margin of Junggar Basin in Xinjiang. The HUGS is close to the large city Urumqi with more than 3.5 million population, its operation and possible influence on the seismicity in the surrounding area poses an important issue to both the safety of industrial activities and human life. We investigate the seismicity within an area centered in HUGS in the range of 86.5°E—87.5°E, 43.5°N—44.5°N. Based on the data from a dense transportable array in this area deployed by the Xinjiang Uyghur Earthquake Administration, we use the matching filtering method to scan the waveform data of the year 2016 and detect 151 missing earthquakes, successfully expand the earthquake catalog to 404 events and reduce the magnitude of completeness from 1.1 to about 0.7. Temporal and spatial analysis shows that the pressure of the HUGS probably has a positive influence on seismicity in the adjacent area. When the pressure increases beyond a certain threshold about 22 MPa, the seismicity in the area becomes more sensitive to the fluctuation of the pressure, even a small perturbation of pressure can trigger earthquakes in the surrounding area. The influence is significant within the 40 km range of the HUGS and phases out with distance.
Key words:The hutubi underground gas storage/
Induced earthquakes/
Matched filter technology



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