黄土塬地区二维地震资料采集及效果分析——以陇县李家河勘查区为例
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摘要
本文以陕西陇县李家河勘查区煤炭资源详查二维地震勘探为实例,在不同地表条件,通过试验,确定了4种不同激发参数。同时,采用5个60Hz检波器串联组合方式接收,以克服近道面波及声波干扰。处理中静校正采用浮动基准面静校正方法,使用地表一致性反褶积技术,保证空间各地震反射道之间一致性。最终获得比较好的资料效果。
In the Loess Plateau area,two-dimensional seismic prospecting is often affected by complex conditions,low signal-to-noise ratio and poor quality,so it is very important to choose suitable parameters for different surface conditions. In this paper,the two-dimensional seismic prospecting for the coal resources in the Lijia River of Long County of t in Shanxi province is illustrated,in different surface conditions,4 different excitation parameters were determined by experiments,and 5-60 Hz geophone series were adopted to overcome the interference of shortcut surface and acoustic wave,and static correction method of floating datum plane was adopted in the process. Using surface consistent deconvolution technology to ensure the consistency of seismic reflection in space,the result obtained is better,which can effectively control the structural shape and coal seam development in the exploration area,and provide the basis for estimating coal resources.
In the Loess Plateau area,two-dimensional seismic prospecting is often affected by complex conditions,low signal-to-noise ratio and poor quality,so it is very important to choose suitable parameters for different surface conditions. In this paper,the two-dimensional seismic prospecting for the coal resources in the Lijia River of Long County of t in Shanxi province is illustrated,in different surface conditions,4 different excitation parameters were determined by experiments,and 5-60 Hz geophone series were adopted to overcome the interference of shortcut surface and acoustic wave,and static correction method of floating datum plane was adopted in the process. Using surface consistent deconvolution technology to ensure the consistency of seismic reflection in space,the result obtained is better,which can effectively control the structural shape and coal seam development in the exploration area,and provide the basis for estimating coal resources.
引文
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[3]董敏煜.地震勘探[M].东营:中国石油大学出版社,2000.
[4]田忠斌,等.三维地震勘探在干厚黄土浅煤层地区的应用[J].中国煤田地质,2004,16(3).
[5]程建远,等.黄土塬区的三维地震勘探技术[J].中国煤田地质,2004,16(6).
[6]吕公河,等.黄土塬地区地震勘探采集技术[J].石油物探,2001,40(2):83-84,91.
[7]常锁亮,等.煤田三维地震勘探的观测系统设计现状与讨论[J].中国煤炭地质,2008,20(9).
[8]刘宝国.鄂尔多斯盆地南部黄土塬区三维地震勘探关键技术研究[J].石油物探,2014,53(3):330-337.
[9]许彩琦,黄璇.黄土塬沟壑区地震野外资料采集方法研究[J].中国煤炭地质,2009,21(S2).
[10]李建国,等.诺门罕盆地找煤工作中二维地震技术应用[J].中国煤炭地质,2012,24(9).