沙漠区低信噪比资料噪声压制方法及应用  

Noise Suppression Method and Application of Low SNR Data in the Desert Area

作　　者：黄倩[1] HUANG Qian(Geophysical Research Institute,Sinopec Jianghan Oilfield Company,Wuhan,Hubei,430035,China)

机构地区：[1]中国石化江汉油田分公司物探研究院,湖北武汉430035

出　　处：《江汉石油职工大学学报》2021年第6期7-10,共4页Journal of Jianghan Petroleum University of Staff and Workers

摘　　要：银额盆地拐子湖凹陷沙漠探区特殊的地形、地貌条件对地震资料的激发和接收产生不利的影响,其表层被巨厚且松散的沙土覆盖,对有效波的吸收衰减严重,信号主频低、分辨率不高,干扰波较为发育且类型繁多,主要有“黑三角”噪声、面波及多组多次折射波,资料信噪比较低。在分析研究区新采集地震资料数据特点和噪声分布规律基础上,采用“分类、分频、分步、分区、分域、分度”六分法叠前去噪思路进行噪声压制,取得较好的应用效果,目的层系及重点勘探区带资料信噪比得到较大程度改善。The special terrain and landform of the desert exploration area in the Guaizhihu depression of the Yine basin inflict an adverse impact on transmitting and receiving seismic data.Its surface covered by the thick and loose sand results in serious attenuation of the effective wave,low signal frequency,low resolution and multiple interference waves,inclusive of "black triangle " noises,surface waves,multiple refraction waves and low SNR data.Based on the analysis of the characteristics of the new acquisition of seismic data and the noise distribution in the study area,a method of pre-stack noise suppression with the "Six Divisions" technique was adopted,achieving good field results.The SNR of data in the target zones and the key exploration area has been improved greatly.

关 键 词：低信噪比 资料品质 叠前去噪 “六分法”叠前去噪 黑三角 面波 多次折射 

分 类 号：P631[天文地球—地质矿产勘探]