三维地震勘探10线25炮束状规则观测系统设计应用  

Design and application of 3D seismic exploration 10 lines and 25 shots beam rule observation system

作　　者：张玉军 ZHANG Yujun(Comprehensive Survey Team,Gansu Bureau of Coal Geology,Tianshui 741002,China)

机构地区：[1]甘肃煤田地质局综合普查队,甘肃天水741002

出　　处：《陕西煤炭》2024年第1期103-106,111,共5页Shaanxi Coal

摘　　要：三维地震勘探观测系统的属性主要包括炮检距、方位角、覆盖次数、非纵距、横纵比。陇东地区各煤矿相继开展先期开采地段(首采区)三维地震勘探工作,采用的观测系统有2种类型,一种是10线10炮束状规则观测系统,另一种是8线20炮束状规则观测系统。从三维地震勘探观测系统属性来看,这2种观测系统存在横纵比较小、方位角有限、炮检距不均匀等不足,为此提出并设计10线25炮束状规则观测系统,经过对3种观测系统的炮检距、方位角、覆盖次数、非纵距、横纵比进行对比分析,设计的10线25炮束状规则观测系统具有全方位观测、横纵比大、炮检距分布较为均匀的优点。现场应用表明,10线25炮束状规则观测系统具有较好应用效果和前景。The attributes of the 3D seismic exploration system mainly include shot geophone distance,azimuth angle,coverage number,non vertical offset,and horizontal and vertical ratio.Coal mines in Longdong have successively carried out 3D seismic exploration work in the advanced mining area(first mining area),and the adopted observation system has two types,one is the 10 lines and 10 shots beam rule observation system,and the other is the 8 lines and 20 shots beam rule observation system.From the perspective of the attributes of the 3D seismic exploration system,the two observation systems have shortcomings such as relatively small horizontal and longitudinal,limited azimuth angle,and uneven shot geophone distance.The 10 lines and 25 shots beam rule observation system was proposed and designed.After the comparative analysis and study of the shot detection range,azimuth,coverage times,non-longitudinal distance and horizontal longitudinal ratio of the three observation systems,it is realized that tthe designed 10 lines and 25 shots beam rule observation system has the advantages of all round observation,large horizontal longitudinal ratio and uniform shot detection range distribution.After practical application,the designed 10 lines and 25 shots beam rule observation system has good effect and prospect.

关 键 词：观测系统 炮检距 方位角 覆盖次数 非纵距 横纵比 

分 类 号：P631.4[天文地球—地质矿产勘探]