宽线大组合理论及其在黄土塬地震采集中的应用
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摘要
黄土塬上的地震勘探是一个世界性的技术难题,其原因在于黄土覆盖区干扰因素太多,使得地震资料的信噪比过低。目前常用的采集方法对于黄土塬区垂直测线方向的强烈的次生干扰无能为力,为此应用宽线大组合方法在塔西南盆地黄土覆盖区进行地震资料采集,并对效果进行了分析。实践表明:宽线大组合采集方法的应用,是黄土塬区抑制噪声提高地震资料信噪比的有效手段,可在低信噪比地区地震勘探中推广应用。
The loess plateau seismic survey is a difficult problem in the world, because too many disturbance factors of the loess overlay area result in too low signal-to-noise ratio. Nowadays the field acquisition mainly uses the geophone pattern, which is an in-line array, but the pattern is not suitable for the strong secondary interference in cross line. Thus, the principle of the wide line array is first used to collect the seismic data in the loess overlay area in the southwest of Tarim basin, and the paper analyzes its effects. Research results show that the principle of the wide line array is an efficient way in removing noises and improving the SNR of the seismic data, and it can be applied in seismic acquisition at low singal-to-noise ratio areas.
The loess plateau seismic survey is a difficult problem in the world, because too many disturbance factors of the loess overlay area result in too low signal-to-noise ratio. Nowadays the field acquisition mainly uses the geophone pattern, which is an in-line array, but the pattern is not suitable for the strong secondary interference in cross line. Thus, the principle of the wide line array is first used to collect the seismic data in the loess overlay area in the southwest of Tarim basin, and the paper analyzes its effects. Research results show that the principle of the wide line array is an efficient way in removing noises and improving the SNR of the seismic data, and it can be applied in seismic acquisition at low singal-to-noise ratio areas.
引文
[1]李庆忠.论地震次生干扰[J].石油地球物理勘探,1983(6).
[2]王世青,孟小红,王双喜,等.兴安岭山地低信噪比地震资料处理技术分析[J].石油物探,2007,46(2):187-192.
[3]刘新文,严峰等.复杂山地提高信噪比地震采集方法探讨[J].天然气工业,2007,27(增刊A):61-62.
[4]谢芳,朱敏,黄花香,等.山地全三维勘探技术在罗家寨地区的应用[J].西南石油大学学报,2007,29(1):5-9.
[5]魏继东,李庆忠.检波器组内高差对高频信息压制的理论分析[J].石油地球物理勘探,2007,42(5):597-602.
[6]张晓斌,罗卫东,唐涛,等.西部地区复杂山地地震采集技术[J].天然气工业,2007,27(增刊A):67-69.
[7]林伯香,肖万富,李博.层析静校正在黄土塬弯宽线资料处理中的应用[J].石油物探,2007,46(4):417-420.
[8]殷军,徐峰,杨举勇,等.库车地区宽线采集技术应用与效果[J].天然气工业,2008,28(6):94-96.
[2]王世青,孟小红,王双喜,等.兴安岭山地低信噪比地震资料处理技术分析[J].石油物探,2007,46(2):187-192.
[3]刘新文,严峰等.复杂山地提高信噪比地震采集方法探讨[J].天然气工业,2007,27(增刊A):61-62.
[4]谢芳,朱敏,黄花香,等.山地全三维勘探技术在罗家寨地区的应用[J].西南石油大学学报,2007,29(1):5-9.
[5]魏继东,李庆忠.检波器组内高差对高频信息压制的理论分析[J].石油地球物理勘探,2007,42(5):597-602.
[6]张晓斌,罗卫东,唐涛,等.西部地区复杂山地地震采集技术[J].天然气工业,2007,27(增刊A):67-69.
[7]林伯香,肖万富,李博.层析静校正在黄土塬弯宽线资料处理中的应用[J].石油物探,2007,46(4):417-420.
[8]殷军,徐峰,杨举勇,等.库车地区宽线采集技术应用与效果[J].天然气工业,2008,28(6):94-96.
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