关于地震采集空间采样密度和均匀性分析  

Analysis on spatial sampling density and uniformity of seismic acquisition

作　　者：钱荣钧 

机构地区：[1]河北省涿州市东方地球物理公司,072751

出　　处：《石油地球物理勘探》2007年第2期235-243,共9页Oil Geophysical Prospecting

摘　　要：高密度、均匀空间采样技术既是解决当前地震勘探所面对的复杂问题的系统技术对策,也是今后地震勘探的发展趋势。本文通过对地震采集的空间采样密度和炮、检点分布的分析,指出空间采样密度和分布的均匀性与偏移剖面的纵、横向分辨率有关,并且直接影响去噪的效果和偏移噪声的大小。从数据处理的角度出发,分析了室内组合在偏移处理中的作用,指出高密度均匀采样的原始资料对叠前去噪和偏移是非常宝贵的,通过去噪和室内组合等手段会改变原始资料的空间采样密度,对后续处理有害无益。文中分别提出了衡量空间采样密度及均匀性的标准,并建议就此建立相应的采集质量评价标准。High-dense and uniform spatial sampling technique is both systematical technical countermeasure solving complex issues the seismic exploration faced currently and development trend of seismic exploration ahead.By analyzing the spatial sampling density and distribution of shot and receiver points of seismic acquisition, the paper points out the spatial sampling density and uniformity of distribution are relative to vertical and horizontal resolution of migrated sections, and directly affect the effects of denoise and strength of migration noise.Starting from the angle of data processing,the paper analyzed the action of indoor array on migration processing and points out the high-dense and uniform sampling raw data are very valuable for prestack denoise and migration.The tools such as denoise and indoor array may change the spatial sampling density of raw data,which is valuable and harmless for the follow-up processing.The paper also presents the standards measuring the spatial sampling density and uniformity respectively, and suggests to build up associated appreciate standard of acquisition quality.

关 键 词：地震采集 空间采样密度 均匀性 叠前处理 

分 类 号：P618.13[天文地球—矿床学]