| 摘要: |
| 提出利用部分丼偏移距共反射面元(CO CRS)叠加提高稀疏低倍噪比叠前地霖资料质II。通过多参数的C0 CRS旅行时公式计算得到部分叠加的CRS超道集,对数据进行规则化，以利于以后的常规处理如速度分析、叠前偏 移等。模型试算和实际资料处钾结果表明，与原始地孬数据相比,对经过部分CO CRS叠加处理后的發前数据进行 偏移，不仅提高了偏移剖面的信噪比，同时改善了同相轴的连续性，获得f较好的成像结果。 |
| 关键词: 地球物殚勘探 地震资料 共反射面元(CRS)叠加 共偏移距共反射面元(CO CRS) 共反射面元(CRS)超 道集 数据规则化 |
| DOI：10.3969/j.issn.1673-5005.2012.02.012 |
| 分类号:P 631 |
| 基金项目:tK家“973”课题<2007CB:209605);闽家“863"课题(2009AA06Z206) |
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| Prestack seismic data enhancement with common-offset common-reflection-surface stack |
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LI Dong1,LI Zhen-chun1,KONG Xue1,XIONG Yu2,SUN Xiao-dong1
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(1.College of Geosciences in China University of Petroleum，Qingdao 266580，China ;2. Well Logging Company，CNPC Chuanqing Drilling & Exploration Corporation, Chongqing 400021，China)
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| Abstract: |
| A partial common-offset common-reflention-surfane (CO CHS) stacking mpthad was developed to enhance the quality of sparse low fold prestack seismic data. A multi-parameter CO CRS travelti脈 formula was applied to compute partial stacked CRS supergathers, and the data were regularized by filling the gaps in (!as<\s of missing traces compared with original CMP gathers. These improved prestack data which can be used in many conventional processing steps inclmiing veiociity analysis or prestack migration instead of the origiiml data. The model test and practical data processing results show that compared with the image section obtained from the original seismic data, the image section by the application of migration with the prestack data obtained throu^t partial CO CRS stack improves not only the signal-to-noise ratio but also the continuity of reflection event, which has better imaging results. |
| Key words: geophysical prospecting seismic data common-reflection-surface (CRS) stack common-offset common-reflec-lion-surface (CO CRS) stack common-refleclion-surface ( CRS) supergathers data regularization |
