爆炸机精确井口时间获取方法  

The method to get the precise uphole time (τ) of the blaster

作　　者：王少伟[1] 刘长青[1] 郭宽明[1] 王国平 

机构地区：[1]中原石油勘探局地球物理勘探公司

出　　处：《石油仪器》2009年第4期34-36,101,共3页Petroleum Instruments

摘　　要：文章提出的爆炸机精确井口时间获取方法,包括与井口时间(τ值)密切相关的爆炸时刻确定方法、初至时刻确定方法及爆炸点深度确定方法。该方法能够精确测量爆炸时刻和地震初至波到达井口的初至时刻,从而精确地获取井口时间。在爆炸机中采用文章中提出的方法,其τ值精度优于0.5ms(记录精度超过0.01ms),可信度超过了95%,彻底解决了爆炸机τ值不准的问题。This article proposes the method to get the precise uphole time(τ)of the blaster,including the determinate method of the blasting time which is closely related to the uphole time,the determinate method of the first break and the definite depth of the shotpoint.This method can measure the blasting time and the time of the first break arriving at the uphole,thus acquiring the uphole time precisely.The precision of the method proposed in the article,surpasses 0.5ms(The precision of the record surpasses 0.01ms),and the confidence level has surpassed 95%,so we can settle the question that the blasting time is not accurate.

关 键 词：爆炸机 爆炸时刻 初至时刻 井口时间 

分 类 号：P631.432[天文地球—地质矿产勘探]