井间地震层析成像在柳北换流站场地工程勘查中的应用  

Application of Cross-well Seismic Exploration in Site Engineering Exploration of Liubei Converter Station in Guangxi Province

作　　者：宗育泉 彭代诚 刘江平[2] Zong Yuquan;Peng Daicheng;Liu Jiangping(Central Southern China Electric Power Design Institute CO,LTD.,China Power Engineering Consulting Group,Wuhan Hubei 430071,China;Institute of Geophysics and Geomatics,China University of Geosciences,Wuhan Hubei 430074,China)

机构地区：[1]中国电力工程顾问集团中南电力设计院有限公司,湖北武汉430071 [2]中国地质大学地球物理与空间信息学院,湖北武汉430074

出　　处：《工程地球物理学报》2020年第1期93-100,共8页Chinese Journal of Engineering Geophysics

摘　　要：在场地工程勘查中,井间地震勘探是一项前沿勘探方法技术。本次井间地震勘探的场地试验是在充分调研和分析广西柳北换流站场地地质条件与干扰源的情况下,采用优化的观测系统和采集参数,完成了井间数据采集。基于层析成像基本理论,通过对比分析两种射线追踪方法的反演成像结果而选择效果最佳的方法,获得了各井的速度分布剖面。结合工程钻孔资料,对二维速度场进行了标定和定量解释分析研究,并充分采用多个井位连井剖面验证。结果表明:在工程勘查中,井间地震层析成像拾取基岩面和探测岩溶是行之有效的地球物理方法,可获得异常体空间分布,且具有较高的分辨率。In site engineering exploration,cross-well seismic exploration is a cutting-edge exploration method and technology.The site test of this interwell s&smic exploration is to fully investigate and analyze the geological conditions and interference sources of the Liubei converter station in Guangxi,and uses the optimized observation system and acquisition parameters to complete the data acquisition between wells.Based on the basic theory of tomography,by comparing and analyzing the inversion imaging results of the two ray tracing methods and selecting the best method,the velocity distribution profiles of each well are obtained.Combined with the existing engineering drilling data,the two-dimensional velocity field was calibrated and quantitatively interpreted and analyzed,and multiple well locations were used to verify the well profile.The results show that it is an effective geophysical method to pick up bedrock surface and detect karst by cross一well seismic tomography in engineering exploration.The spatial distribution of anomalous bodies can be obtained with high resolution.

关 键 词：工程勘查 井间地震 层析成像 岩溶 

分 类 号：P631.4[天文地球—地质矿产勘探]