塔里木盆地西南坳陷山前带复杂地震资料“六分法”叠前去噪方法应用研究  

Application and study of six-division method of denoising prestack technology in complex seismic data processing for piedmont belt of southwest depreesion in Tarim basin

作　　者：韩淼[1] 白忠凯[1] 杨有星[1] 

机构地区：[1]中国地质调查局油气资源调查中心,北京100029

出　　处：《地球物理学进展》2016年第3期1088-1094,共7页Progress in Geophysics

基　　金：塔里木盆地油气资源战略选区调查(1211302108022);新疆南部油气勘查区块调查评价及优选(12120115001901)联合资助

摘　　要：塔里木盆地西南坳陷山前带勘探程度较低,是开展油气勘探的重要潜力区之一.受地表条件复杂、近地表激发条件差、目的层埋藏较深等地震地质条件的影响,研究区地震资料信噪比低、品质较差,严重地制约了地震资料解决地质问题的能力.本文在分析研究区新采集的深反射地震资料基础上,根据不同类型地区地震数据记录特点和噪声分布规律,采用"六分法"叠前去噪方法进行噪声压制,在实际资料处理中取得了较好的应用效果,中深层资料信噪比得到较大程度的改善.The prospecting extent for piedmont belt of southwest depreesion in Tarim basin is relatively low,which however is a potential area for oil and gas exploration. The complicated surface condition,near-surface shooting conditions and deeply buried target areas result in poor quality seismic data with low signal-to-noise ratio,which have greatly restricted the capability of solving the geological problem by using seismic data. Through an analysis of newly acquired deep reflection seismic data in research area,this paper applied the six-division method of denoising prestack technology in seismic data processing to suppress different types of interferences,according to character of seismic data and regularities of noise distribution. The authors ＇ work has comfirmed the sixdivision method of denoising prestack technology can greatly improve signal-to-noise ratio of medium and deep layers, thus attaining superior applying results in field data processing.

关 键 词：塔西南坳陷 山前带 六分法 叠前去噪技术 信噪比 

分 类 号：P631[天文地球—地质矿产勘探]