延庆台井下小极距地电阻率观测系统分析

doi:10.12196/j.issn.1000-3274.2020.04.012

摘要/Abstract

摘要： 随着经济建设的发展, 地电阻率定点观测区环境被干扰严重影响观测质量, 装置系统在地表布设的工作方式难以取得有效观测和持续发展, 因此装置系统向井下深部布设受到人们关注。同时, 地表大极距观测方式难以持续发展, 也促使地电阻率定点观测向井下小极距观测方式发展。井下小极距观测相比地表大极距观测占地面积小, 能较好地排除或减弱地表测区环境干扰对观测结果的影响, 既能适应经济发展的需要, 又能较好地为地震监测服务。 2018年, 在总结已建井下地电阻率台站布极方式和建设工艺的基础上, 新建延庆台井下小极距地电阻率观测。本文重点分析了延庆台井下小极距地电阻率观测装置系统建设中的几个关键问题, 如水平向和垂直向观测相结合、布极方式、电极制作和埋设深度等装置系统技术过程, 以及水平向和垂直向观测装置系数的计算等。延庆台建设较好地获得了近全空间观测布设, 从理论上解决了井下小极距地电阻率建设的难点, 为将来要进行井下小极距地电阻率观测装置系统建设的台站提供参考。

关键词: 地电阻率, 井下观测, 小极距, 延庆地震台

Abstract: With the rapid development of local economic construction, apparent resistivity observation at fixed stations has suffered serious disturbances. The traditional observation method of large electrode spacing faces difficulties to move forward under this situation. Therefore, apparent resistivity has to towards the well observation using short-electrode spacing. Compared with the surface large electrode spacing observation, the well observation using short-electrode spacing has two advantages. One is the much smaller covering area. The other is its well ability to inhibit the disturbance from surface environment changes. It can not only meet the needs of land usage from economic development, but also be better used in the earthquake prediction. In this paper, we will take an analysis on the feasibility of the short-electrode spacing well observation device at Yanqing station, including the combination of observation both in horizontal and vertical directions, pole arrangement, electrode manufacture and well depth, and the calculation of the device coefficients of both horizontal and vertical directions. The short-electrode spacing well observation is near full-space measurement of apparent resistivity. The knowledge and experiences from the construction help bring insight into the unknown difficulties of the well short-electrode spacing observation. And it also provides some references for the future apparent resistivity observation using the same type of device system.

Key words: Apparent Resistivity, Well measurement, Short-electrode spacing, Yanqing station

中图分类号:

P315.6

王同利, 崔博闻, 徐化超, 韩孔艳, 乔永军, 朱石军. 延庆台井下小极距地电阻率观测系统分析[J]. 地震, 2020, 40(4): 156-168.

WANG Tong-li, CUI bo-wen, XU Hua-chao, HAN Kong-yan, QIAO Yong-jun, ZHU Shi-jun. Analysis of Short-electrode Spacing Well Apparent Resistivity Observation System in Yanqing Station[J]. EARTHQUAKE, 2020, 40(4): 156-168.

参考文献

[1] 杜学彬, 叶青, 马占虎, 等. 强震附近电阻率对称四极观测的探测深度[J]. 地球物理学报, 2008, 51(6): 1943-1949.
DU Xue-bin, YE Qing, MA Zhan-hu, et al. The detection depth of symmetric four-electrode resistivity observation in/near the epicentral region of strong earthquakes[J]. Chinese Journal of Geophysics, 2008, 51(6): 1943-1949 (in Chinese)
[2] 杜学彬, 刘君, 崔腾发, 等. 两次近距离大震前成都台视电阻率重现性、相似性和各向异性变化[J]. 地球物理学报, 2015, 58(2): 576-588.
DU Xue-bin, LIU Jun, CUI Teng-fa, et al. Repeatability similarity and anisotropy changes in apparent resistivity recorded by station Chengdu at near distances before two great earthquakes[J]. Chinese Journal of Geophysics, 2015, 58(2): 576-588 (in Chinese).
[3] 陈军营, 刘君, 刘宝勤. 2013年岷县漳县M_S6.6地震前大地电磁视电阻率变化[J]. 地震, 2015, 35(4): 109-118.
CHEN Jun-ying, LIU Jun, LIU Bao-qin, et al. Magnetotelluric apparent resistivity changes before the 2013 Minxian-Zhangxian M_S6.6 earthquake[J]. Earthquake, 2015, 35(4): 109-118 (in Chinese).
[4] 郭安宁, 郭志宇, 赵乘程, 等. 2013年甘肃岷县漳县M_S6.6地震及短临前兆的显现[J]. 地震工程学报, 2015, 37(4): 981-985.
GUO An-ning, GUO Zhi-yu, ZHAO Cheng-cheng, et al. Minxian-Zhangxian M_S6.6 earthquake in Gansu (2013) and its short-term and impending precursors[J]. China Earthquake Engineering Journal, 2015, 37(4): 981-985 (in Chinese).
[5] 彭玉柱, 张世民, 李建章. 中强地震前周至台地电阻率的异常变化[J]. 震灾防御技术, 2015, 10(2): 455-463.
PENG Yu-zhu, ZHANG Shi-min, LI Jian-zhang. Precursory anomalies of geo-resistance before moderate-strong earthquake based on observed data at Zhouzhi seismic station[J]. Technology for Earthquake Disaster Prevention, 2015, 10(2): 455-463 (in Chinese).
[6] 钱复业, 赵玉林, 于谋明, 等. 地震前地电阻率的异常变化[J]. 中国科学B辑, 1982, (9): 831-839.
QIAN Fu-ye, ZHAO Yu-lin, YU Mou-ming, et al. The anomalous changes of georesistivity before earthquake[J]. Science in china B series. 1982, (9): 831-839 (in Chinese).
[7] 钱家栋, 陈有发, 金安忠. 地电阻率法在地震预报中的应用[M]. 北京: 地震出版社, 1985.
QIAN Jia-dong, CHEN You-fa, JIN An-zhong. The geo-resistivity method used in earthquake prediction[M]. Beijing: Seismological Press, 1985 (in Chinese).
[8] 解滔, 刘杰, 卢军, 等. 2008年汶川M_S8.0地震前定点观测电磁异常回溯性分析[J]. 地球物理学报, 2018, 61(5): 1922-1937.
XIE Tao, LIU Jie, LU Jun, et al. Retrospective analysis on electromagnetic anomalies observed by ground fixed station before the 2008 Wenchuan M_S8.0 earthquake[J]. Chinese Journal of Geophysics, 2018, 61(5): 1922-1937 (in Chinese).
[9] Lu J, Qian F Y, Zhao Y L. Sensitivity analysis of the Schlumberger monitoring array: application to changes of resistivity prior to the 1976 earthquake in Tangshan, China[J]. Tectonophysics, 1999, 307(3-4): 397-405.
[10] 钱家栋, 张学民, 王亚璐, 等. 2008年汶川M_S8.0地震前成都台NE向地电阻率趋势异常的数值模拟[J]. 地震, 2018, 38(2): 107-116.
QIAN Jia-dong, ZHANG Xue-min, WANG Ya-lu, et al. Simulation of the geo-electricity anomaly in the NE direction at Chengdu station associated with the 2008 Wenchuan M_S8.0 earthquake[J]. Earthquake, 2018, 38(2): 107-116 (in Chinese).
[11] 钱家栋, 曹爱民. 1976年唐山7.8级地震地电阻率和地下水前兆综合物理机制研究[J]. 地震, 1998, (S1): 1-9.
QIAN Jia-dong, CAO Ai-min. Research on comprehensive mechanism of precursors in apparent resistivity and water table associated with 1976 Tangshan earthquake (M=7.8)[J]. Earthquake, 2018, 18(S1): 1-9 (in Chinese).
[12] 桂燮泰, 戴经安, 关华平. 低频交流电法的试验和研究[J]. 西北地震学报, 1988, 10(2): 22-28.
GUI Xie-tai, DAI Jing-an, GUAN Hua-ping. Experiment and discussion on the low-frequency A.C. method[J]. Northwestern Seismological Journal, 1988, 10(2): 22-28 (in Chinese).
[13] 马希融. 交流地电阻率方法在马家沟地震台试验结果[J]. 地震, 1989, (3): 46-51.
MA Xi-rong. Experimental results of alternative resistivity method in Majiagou station[J]. Earthquake, 1989, (3): 46-51 (in Chinese).
[14] 张宇, 王兰炜, 张兴国, 等. 相关检测技术在低频交流地电阻率观测中的应用[J]. 地球物理学进展, 2014, 29(4): 1973-1979.
ZHANG Yu, WANG Lan-wei, ZHANG Xing-guo, et al. Application of correlation detection technology in low-frequency AC geo-resistivity observation[J]. Progress in Geophysics, 2014, 29(4): 1973-1979 (in Chinese).
[15] 马小溪, 张宇, 王兰炜, 等. 地电阻率交流观测方法中信号检测方法研究[J]. 地震学报, 2015, 35(7): 853-864.
MA Xiao-xi, ZHANG Yu, WANG Lan-wei, et al. Signal detection method for AC geo-resistivity observation[J]. Acta Seismologica Sinica, 2015, 35(7): 853-864.
[16] 聂永安, 巴振宁, 聂瑶. 深埋电极的地电阻率观测研究[J]. 地震学报, 2010, 32(1): 33-40.
NIE Yong-an, BA Zheng-ning, NIE Yao. Study on buried electrode resistivity monitoring system[J]. Acta Seismologica Sinica, 2010, 32(1): 33-40 (in Chinese).
[17] 葛为中. 层状介质点源电场正演解析及其应用[J]. 地球物理学报, 1994, 37(增刊Ⅱ): 534-541.
GE Wei-zhong. The forward solution of the electrical field due to a point source in layered media and its applications[J]. Chinese Journal of Geophysics, 1994, 37(S2): 534-541 (in Chinese).
[18] 解滔, 杜学彬, 卢军. 井下视电阻率观测影响系数分析[J]. 中国地震, 2016, 32(1): 40-53.
Xie Tao, Du Xue-bin, Lu Jun. Sensitivity coefficients analysis of deep-well apparent resistivity measurement[J]. Earthquake Research in China, 2016, 32(1): 40-53 (in Chinese).
[19] 钱家栋, 中国地震局监测预报司编. 地震电磁学理论基础与观测技术[M]. 北京: 地震出版社, 2010.
QIAN Jia-dong, Department of earthquake monitoring and prediction of China Earthquake Administration. Earthquake electromagnetics theory basis and observation technology[M]. Beijing: Seismological Press, 2010 (in Chinese).
[20] 姚文斌. 电测深数值计算和解释入门[M]. 北京: 地震出版社, 1989.
YAO Wen-bin. Introduction of electrical sounding numerical computation and explanation[M]. Beijing: Seismological Press, 1989 (in Chinese).
[21] O′Neill D J, Merrick N P. A digital linear filter for resistivity sounding with a generalized electrode array[J]. Geophysical Prospecting, 1984, 32(1): 105-123.
[22] 赵和云, 钱家栋. 郫县台多极距观测资料的反演和分析[J]. 中国地震, 1987, 3(增刊): 73-78.
ZHAO He-yun, QIAN Jia-dong. Inversion and analysis of data of temporal change in apparent resistivity with multi-separations in Pixian station, Sichuan Province[J]. Earthquake Research In China, 1987, 3(S1): 73-78 (in Chinese).
[23] Lu J, Xie T, Li M, et al. Monitoring shallow resistivity changes prior to the 12 May 2008 M8.0 Wenchuan earthquake on the Longmenshan tectonic zone, China[J]. Tectonophysics, 2016, 675: 244-257
[24] 王兰炜, 张世中, 张宇, 等. 井下地电阻率观测中装置系数的计算以天水地震台井下观测为例[J]. 工程地球物理学报, 2014, 11(1): 50-59.
WANG Lan-wei, ZHANG Shi-zhong, ZHANG Yu, et al. Calculation of the configuration coefficient in the deep-well geo-electrical resistivity observationtaking deep-well observation of Tianshui earthquake station as an example[J]. Chinese Journal of Engineering Geophysics, 2014, 11(1): 50-59 (in Chinese).
[25] 聂永安, 姚兰予. 成层半空间深埋电极产生的电位分布[J]. 中国地震, 2009, 25(3): 246-255.
NIE Yong-an, YAO Lan-yu. Study on electrical potential by buried source electrode with in horizontally layered half space model[J]. Earthquake Research in China, 2009, 25(3): 246-255 (in Chinese).
[26] 刘允秀. 二层剖面地电阻率测量的最佳电极距选择[J]. 华南地震, 1985, 5(4): 66-70.
LIU Yun-xiu. Selection of the best electrode spacing in two-layered resistivity measurements[J]. South China Journal of Seismology, 1985, 5(4): 66-70 (in Chinese).
[27] 康云生, 安海静, 马可兴, 等. 天水地电阻率地表与井下多种观测方式的试验分析[J]. 地震工程学报, 2013, 35(1): 190-195.
KANG Yun-sheng, AN Hai-jing, MA Ke-xing, et al. Test analysis on geoelectrical resistivity observation combining the surface and deep-well methods at Tianshui seismic station in Gansu Province[J]. China Earthquake Engineering Journal, 2013, 35(1): 190-195 (in Chinese).
[28] Mazzella A, Morrison H F. Electrical resistivity variations associated with earthquakes on the San Andreas fault[J]. Science, 1974, 185(4154): 855-857.
[29] 田山, 刘允秀, 聂永安, 等. 地震地电阻率观测改进方法研究——电测井技术的移植应用与数值模型分析[J]. 地震学报, 2009, 31(3): 272-281.
TIAN Shan, LIU Yun-xiu, NIE Yong-an, et al. Improved method of earth resistivity observation: Transplant application and numerical model analysis of electric well logging technique[J]. Acta Seismologica Sinica, 2009, 31(3): 272-281 (in Chinese).
[30] 孟庆武, 阎洪朋. 临沂台深井电阻率异常变化与地震的关系[J]. 西北地震学报, 1991, 13(4): 70-74.
MENG Qing-wu, YAN Hong-peng. Anomalous changes of resistivity in deep wells observed at Linyi station and its relation to earthquakes[J]. Northwestern seismological journal, 1991, 13(4): 70-74 (in Chinese).
[31] 王兰炜, 张宇, 张世中, 等. 我国井下地电阻率观测技术现状分析[J]. 地震地磁观测与研究, 2015, 36(2): 95-102.
WANG Lan-wei, ZHANG Yu, ZHANG Shi-zhong, et al. The status of deep-well geo-electrical resistivity observation in China[J]. Seismological and Geomagnetic Observation and Research, 2015, 36(2): 95-102 (in Chinese).
[32] 解滔, 于晨, 卢军. 开展小极距井下地电阻率观测的可行性分析[J]. 中国地震, 2019, 35(1): 14-24.
XIE Tao, YU Chen, LU Jun. Feasibility analysis on short-electrode spacing well apparent resistivity observation[J]. Earthquake Research in China, 2019, 35(1): 14-24 (in Chinese).
[33] 刘昌谋, 桂燮泰, 柴剑勇, 等. 河源地电台全空间地电阻率试验[J]. 华南地震, 1994, 14(3): 40-45.
LIU Chang-mou, GUI Xie-tai, CHAI Jian-yong, et al. The observation test in deep-hole electrodes (whole space) resistivity at the Heyuan geoelectrical observatory[J]. South China Journal of Seismology, 1994, 14(3): 40-45 (in Chinese).