地球物理学进展 ›› 2009, Vol. 24 ›› Issue (6): 2267-2273.doi: 10.3969/j.issn.1004-2903.2009.06.048

• 应用地球物理学 • 上一篇    下一篇

叠前时间偏移技术在淮北某煤矿采区三维地震勘探中的应用与效果

武磊彬;徐奭   

  1. (安徽省煤田地质局物探测量队,宿州 234000)
  • 收稿日期:2008-10-24 修回日期:2009-01-09 出版日期:2009-12-20 发布日期:2009-12-20
  • 通讯作者: 武磊彬

Applied effect of prestack time migration technology in 3D seismic exploration at a coal mine of Huaibei

WU Lei-bin;XU Shi   

  1. (Geophysical Prospecting and Surveying Team,Anhui Bureau of Coal Geology,Suzhou 234000,China)
  • Received:2008-10-24 Revised:2009-01-09 Online:2009-12-20 Published:2009-12-20

摘要: 淮北某煤矿采区三维地震勘探地质条件极为复杂,区内褶皱、断层构造发育,常规叠后时间偏移处理很难准确成像,给后期资料解释工作带来不利影响.针对这一问题,采用叠前时间偏移技术,结合煤田地震勘探特点,对影响叠前偏移处理质量的关键步骤(预处理、静校正、叠前去噪、时间域速度模型建立)进行了研究,取得了显著效果.利用叠前偏移数据体解释,最终圆满完成了地质任务.本文通过应用实例,说明了煤田地震勘探资料处理利用叠前时间偏移技术对复杂构造成像效果较好,信噪比提高,断点解释更可靠.

Abstract: The geological conditions of 3D seismic exploration of a coal mine in Huaibei is complex,so conventional poststack time migration is difficult to get true images, that can bring adverse effects to seismic data interpretation.Using prestack time migration technology, combined with characteristics of coal field seismic exploration, we have stutied the key steps (pretreatment,static correction, prestack seismic data denoising ,built velocity model of time domain) which impact quality of prestack time migration,and achieved remarkable results.Using pre-stack migration data to interpret,we have successfully completed the task of the geological task finally. The practical application shows that using pre-stack time migration technology is beneficial to complex structure imaging,can improve signal to noise ratio,and make it more reliable to interpret fault-points.

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