关于地震采集空间采样密度和均匀性分析
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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.
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.
引文
[1]狄帮让.面元大小对地震成像分辨率的影响分析.石油地球物理勘探,2006,41(4):363~368
[2]吕公河.高精度地震勘探采集技术探讨.石油地球物理勘探,2003,38(3):268~274
[3]云美厚,丁伟.地震分辨率新认识.石油地球物理勘探,2005,40(5):603~608
[4]熊金良等.面元大小与纵向分辨率关系.石油地球物理勘探,2006,41(4):489~491
[5]Andreas Cordsen,John W Peirce著;俞寿朋等译.陆上三维地震勘探的设计与施工.石油地球物理勘探局,1996
[6]Z Yil maz.Seismic Data Analysis.Society of Explora-tion Geophysicists,476~609
[7]钱荣钧.积分法叠偏中的问题.石油地球物理勘探,1981,16(3):1~6
[2]吕公河.高精度地震勘探采集技术探讨.石油地球物理勘探,2003,38(3):268~274
[3]云美厚,丁伟.地震分辨率新认识.石油地球物理勘探,2005,40(5):603~608
[4]熊金良等.面元大小与纵向分辨率关系.石油地球物理勘探,2006,41(4):489~491
[5]Andreas Cordsen,John W Peirce著;俞寿朋等译.陆上三维地震勘探的设计与施工.石油地球物理勘探局,1996
[6]Z Yil maz.Seismic Data Analysis.Society of Explora-tion Geophysicists,476~609
[7]钱荣钧.积分法叠偏中的问题.石油地球物理勘探,1981,16(3):1~6
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