黄土塬过渡带地震资料处理方法探讨  

Discussion of Processing Method of Seismic Data of Transitional Zone in Loess Tableland

作　　者：董江伟[1] 

机构地区：[1]中国石化石油工程地球物理有限公司江汉分公司,湖北潜江433123

出　　处：《江汉石油职工大学学报》2013年第6期33-34,39,共3页Journal of Jianghan Petroleum University of Staff and Workers

摘　　要：鄂尔多斯盆地南部旬邑宜君地区地表结构属于黄土塬到山地过渡区域,地貌比较复杂、高程变化剧烈、地表出露岩性变化大是导致该地区地震资料信噪比低、干扰波发育复杂、静校正问题突出、子波一致性差异大的主要因素。对此,其三维地震资料的处理结果如下:1)采取多种静校正方法进行对比分析,选择层析静校正解决长波长的静校正问题,使用最大能量法解决剩余静校正;2)综合运用多种去噪方法,在去除干扰波的同时尽量保护有效波;3)采取地表一致性子波和频率一致性处理技术,保证剖面能量均衡性和一致性。实际资料的处理结果表明,使用上述处理方法使该地区剖面信噪比和分辨率得到较大程度的提高。The earth＇s surface of Yijun area in Xunyi County in southern Ordos Basin belongs to transitional zone between Loess Tableland and hilly area, where the landform is rather complex; the elevation and sur- face lithology change greatly. These factors are responsible for a low SNR of seismic data, complex develop- ment of interference wave, highlighted problem of statics correction and big difference of wavelet coherence. The results of 3D seismic data there are as follows. 1. Multiple statics correction methods adopted to make contrastive analysis; chromatography statics correction is selected to deal with long--wave statics issue; and the biggest energy method is used to work out residual statics correction. 2. Multiple denoising methods are employed comprehensively to protect effective wave to the greatest extent while interference waves are re- moved. 3. Processing techniques of surface coherent wavelets are adopted to make profile capabilities bal- anced and coherent. It proves that the usage of these methods make the profile＇s SNR and resolution per- fect.

关 键 词：地震资料处理 静校正 层析静校正 剩余静校正 速度分析 

分 类 号：P631[天文地球—地质矿产勘探]