基于QT的能量比法地震波初至拾取系统设计
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摘要
利用能量比法拾取地震波初至的基本思路为:在初至到来之前地震波的振幅很小,而在初至到来之后,其振幅增加到很大,因此在初至附近的两时窗内的能量比值会很大,只要找到地震道上能量比的最大值点,此点对应的时间即为初至时间。本文在Linux工作环境下,以QT为开发平台,利用能量比法实现了SEG-Y格式地震文件的读取,并以共炮点、共接收点和共炮检距的方式对初至时间进行交互式自动采集与检验校正,提高了初至拾取的效率和精度。
The basic idea for picking up first break by energy ratio method is described as below:the seismic amplitude is very small before the first break,while it is increased to a big value after the first break,therefore the energy ratio between two time windows near the first break will be a very big value which should correspond to the first break time of the seismic trace.In this paper under Linux working environment and utilizing QT as developing platform,application of the energy ratio method realized the access to SEG-Y format seismic files,the first break times were automatically and interactively picked up,checked and correlated in common shot point gathers,common receiver point gathers and common offset gathers respectively,the efficiency and accuracy for seismic first break picking up were raised greatly.
The basic idea for picking up first break by energy ratio method is described as below:the seismic amplitude is very small before the first break,while it is increased to a big value after the first break,therefore the energy ratio between two time windows near the first break will be a very big value which should correspond to the first break time of the seismic trace.In this paper under Linux working environment and utilizing QT as developing platform,application of the energy ratio method realized the access to SEG-Y format seismic files,the first break times were automatically and interactively picked up,checked and correlated in common shot point gathers,common receiver point gathers and common offset gathers respectively,the efficiency and accuracy for seismic first break picking up were raised greatly.
引文
[1]吴志勤,王赟,宁书年.Linux下基于体绘制算法实现地震数据的三维可视化.计算机工程与应用,2004,(22):182～184
[2]庄东海,许云,乌达巴拉.地震道时窗属性特征检测初至时间的研究.江汉石油学院学报,1999,21(4):45～48
[3]曾富英,李敏锋,申维.地震波初至拾取的分形研究.现代地质,2002,16(2):209～203
[4]张婉,王磊,谭昌勇.Windows环境下基于Qt的SEG-Y格式地震数据可视化.计算机与数字工程,2008,(2):10～12
[5]赵宇,刘冀伟,王志良.油田勘探决策支持系统的SEGY文件处理研究.石油工业计算机应用,2003,11(4):9～11
[6]左国平,王彦春,隋荣亮.利用能量比法拾取地震初至的一种改进方法.石油物探,2004,43(4):345～348
[2]庄东海,许云,乌达巴拉.地震道时窗属性特征检测初至时间的研究.江汉石油学院学报,1999,21(4):45～48
[3]曾富英,李敏锋,申维.地震波初至拾取的分形研究.现代地质,2002,16(2):209～203
[4]张婉,王磊,谭昌勇.Windows环境下基于Qt的SEG-Y格式地震数据可视化.计算机与数字工程,2008,(2):10～12
[5]赵宇,刘冀伟,王志良.油田勘探决策支持系统的SEGY文件处理研究.石油工业计算机应用,2003,11(4):9～11
[6]左国平,王彦春,隋荣亮.利用能量比法拾取地震初至的一种改进方法.石油物探,2004,43(4):345～348
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