|
|
Application of shallow seismic reflection surveys in the exploration of urban underground space in Jinan |
XIAO Guan-Hua(), ZHANG Wei, CHEN Heng-Chun, ZHUO Wu, WANG Yan-Jun, REN Li-Ying |
Liaohe Geophysical Exploratione Company Branch of BGP CNPC,Panjin 124010,China |
|
|
Abstract Shallow seismic reflection (SSR) surveys are an indispensable method in the exploration of urban underground space.Their exploration effects are affected by many aspects such as excitation,receiving factors,acquisition parameters,and processing methods,which should be systematically scientifically demonstrated and selected according to geological tasks.Taking an underground space exploration project in Jinan as an example,the authors discussed the method of improving the resolution of SSR surveys.Through the comprehensive analysis of the collected data,a reasonable seismic geological model was established.Based on this model,the forward analysis and illumination analysis were performed using the fluctuation equation of seismic data acquisition parameters,obtaining a high-density two-dimensional seismic observation plan.Meanwhile,high-resolution reflection images were obtained through the study on targeted data processing techniques such as pre-stack denoising,deconvolution,and velocity field optimization.Excellent exploration results have been achieved in the project.This study will provide reliable geophysical exploration data for the construction of the smart city in Jinan,and can serve as references for the implementation of SSR exploration in this area in the future.
|
Received: 03 August 2020
Published: 25 February 2022
|
|
|
|
|
|
Shallow geological model map
|
|
F-K spectrum analysis of single gun in forward modeling with different trace distances
|
|
Analysis chart of velocity analysis precision(a) and dynamic correction stretching distortion(b)
|
|
Wave field snapshot analysis of wave equation forward modeling
|
|
Illumination comparison of wave equation with different offset a—offset 360 m;b—offset 450 m;c—offset 540 m;d—offset 630 m
|
|
Comparison of profile before (a) and after (b) static correction
|
|
General flow chart of denoising
|
|
Comparison of profile before (a) and after (b) denoising
|
|
Processing flowchart of improve resolution
|
|
Comparison of profile before(a) and after(b) velocity field optimization
|
|
Final processing migration profile
|
[1] |
赵镨, 姜杰, 王秀荣. 城市地下空间探测关键技术及发展趋势[J]. 中国煤炭地质, 2017,29(9):61-73.
|
[1] |
Zhao P, Jiang J, Wang X R. Urban underground space exploration key technologies and development trend[J]. Coal Geology of China, 2017,29(9):61-73.
|
[2] |
武斌, 李诗倢, 陈宁, 等. 成都市城市地下空间探测的地球物理方法研究[J]. 四川地质学报, 2019,39(S1):194-224.
|
[2] |
Wu B, Li S J, Chen N, et al. Study on geophysical methods for urban underground space exploration in Chengdu[J]. Acta Geologica Sichuan, 2019,39(S1):194-224.
|
[3] |
刘保金, 张先康, 方盛明, 等. 城市活断层探测的高分辨率浅层地震数据采集技术[J]. 地震地质, 2002,24(4):524-532.
|
[3] |
Liu B J, Zhang X K, Fang S M, et al. Acquisition technique of high-resolution shallow seismic data for surveying of urban active faults[J]. Seismology and Geology, 2002,24(4):524-532.
|
[4] |
史忠民, 李传磊, 程秀明, 等. 济北地热田地质特征[J]. 山东国土资源, 2005,21(11):39-42.
|
[4] |
Shi Z M, Li C L, Cheng X M, et al. Geological characteristics of geothermal field in North of Jinan City[J]. Land and Resources of Shandong Province, 2005,21(11):39-42.
|
[5] |
王海波, 肖关华, 赵超峰, 等. 辽河外围盆地低信噪比地区高密度地震勘探实例[C]//成都:中国石油学会2019年物探技术研讨会, 2019.
|
[5] |
Wang H B, Xiao G H, Zhao C F, et al. An example of high density seismic exploration in low signal to noise ratio area of Liaohe Peripheral Basin[C]//Chengdu:Geophysical Technology Seminar of China Petroleum Society in 2019, 2019.
|
[6] |
刘建勋, 张保卫, 王小江, 等. 羌塘盆地浅层地震探测方法技术[J]. 物探与化探, 2015,39(4):678-685.
|
[6] |
Liu J X, Zhang B W, Wang X J, et al. The method for shallow seismic exploration in Qiangtang Basin[J]. Geophysical and Geochemical Exploration, 2015,39(4):678-685.
|
[7] |
李万伦, 田黔宁, 刘素芳, 等. 城市浅层地震勘探技术进展[J]. 物探与化探, 2018,42(4):653-661.
|
[7] |
Li W L, Tian Q N, Liu S F, et al. Progress in the study of shallow seismic exploration technology in urban areas[J]. Geophysical and Geochemical Exploration, 2018,42(4):653-661.
|
[8] |
李环宇, 丁锐, 张世民, 等. 浅层地震勘探与联合钻孔探测揭示丽江—小金河断裂隐伏段复杂花状构造特征[J]. 中国地震, 2020,36(1):1-13.
|
[8] |
Li H Y, Ding R, Zhang S M, et al. Shallow seismic exploration and joint borehole exploration reveal complex flower-like structures in the hidden section of the Lijiang-Xiaojinhe fault[J]. China Earthquake, 2020,36(1):1-13.
|
[9] |
岳占伟. 高分辨率城市浅层地震资料处理关键技术研究[D]. 北京:中国地质大学, 2019.
|
[9] |
Yue Z W. Research on the key technology of high resolution processing for urban shallow seismic data[D]. Beijing:China University of Geosciences, 2019.
|
[10] |
杨云岭, 韩文功. 胜利油田高分辨率地震勘探方法与实践[M]. 北京: 石油工业出版社, 2001.
|
[10] |
Yang Y L, Han W G. High resolution seismic exploration method and practice in Shengli Oilfield [M]. Beijing: Petroleum Industry Press, 2001.
|
[11] |
王建民, 王元波, 裴江云, 等. 高分辨率处理技术在松辽盆地中、浅层岩性油藏勘探中的应用[J]. 大庆石油地质与开发, 2004,23(5):107-110.
|
[11] |
Wang J M, Wang Y B, Pei J Y, et al. Application of high resolution processing technique in middle-shallow lithologic reservoirs of SongLiao Basin[J]. Petroleum Geology & Oilfield Development in Daqing, 2004,23(5):107-110.
|
[12] |
温涛. 准噶尔南缘地震资料静校正与去噪技术研究[D]. 北京:中国地质大学, 2019.
|
[12] |
Wen T. Research on static correction and denoising technique for seismic exploration in the South edge of Junggar[D]. Beijing:China University of Geosciences, 2019.
|
[13] |
吴红华. 煤田高精度地震资料处理技术[D]. 青岛:中国石油大学, 2017.
|
[13] |
Wu H H. Coalfield high precision seismic data processing technique[D]. Qingdao:China University of Petroleum, 2017.
|
[14] |
邓桂林. 浅层活断层探测地震资料处理方法研究[D]. 北京:中国地质大学, 2012.
|
[14] |
Deng G L. Study on seismic data processing for shallow active faults detection[D]. Beijing:China University of Geosciences, 2012.
|
[15] |
崔栋, 张研, 胡英, 等. 近地表速度建模方法综述[J]. 地球物理学进展, 2014,29(6):2635-2641.
|
[15] |
Cui D, Zhang Y, Hu Y, et al. The review of near surface velocity modeling[J]. Progress in Geophysics, 2014,29(6):2635-2641.
|
|
|
|