三维转换波资料处理方法研究及应用
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摘要
三维多波地震勘探是地震勘探当前研究的热点。本文针对转换波资料处理中存在的数字检波器频率动态范围变化大,产生高低频噪声严重,三维资料共转换点求取不准及炮检距较大,射线路径不对称和各向异性的影响而无法准确求取转换波速度等难题,运用转换波处理中的极化滤波去噪、三分量旋转、三维转换波转换点定位、四参数速度分析和叠前时间偏移等技术,通过对胜利油田垦71地区单点数字检波器采集的三维转换波地震资料的处理,较好地解决了以上问题。
The 3D multi-wave seismic exploration is hot-point studied in seismic exploration currently. In face of difficulties in converted wave data processing such as large dynamic range of frequency in digital geophone, producing serious noises with higher and lower frequencies, unable to acquire correct CCP of 3D data and large offsets and non-symmetric ray-path and anisotropic influence making difficult in acquire accurate converted wave velocity. Using polarization filtering for denoise, 3D rotation, CCP positioning of 3D converted wave, 4-paramter analysis and prestack time migration in converted wave processing can better solve abovementioned issues by case of processing of 3D converted wave data acquired by single-point digital geophone in Keng-71 zone of Shengli Oilfield.
The 3D multi-wave seismic exploration is hot-point studied in seismic exploration currently. In face of difficulties in converted wave data processing such as large dynamic range of frequency in digital geophone, producing serious noises with higher and lower frequencies, unable to acquire correct CCP of 3D data and large offsets and non-symmetric ray-path and anisotropic influence making difficult in acquire accurate converted wave velocity. Using polarization filtering for denoise, 3D rotation, CCP positioning of 3D converted wave, 4-paramter analysis and prestack time migration in converted wave processing can better solve abovementioned issues by case of processing of 3D converted wave data acquired by single-point digital geophone in Keng-71 zone of Shengli Oilfield.
引文
[1]张永刚,王赟,王妙月.目前多分量地震勘探中的几个关键问题.地球物理学报,2004,47(1):151~155
[2]石建新,王延光,毕丽飞等.多分量地震资料处理解释技术研究.地球物理学进展,2006,21(2):505~511
[3]毕丽飞,李振春,王延光等.转换波处理中共转换点的定位.勘探地球物理进展,2005,28(5):353~356
[4]Dai H and Li X.Anisotropic migration and modelbuilding for 4-C seismic data:Acase study from Al-ba.Expanded Abstracts of71st SEG Mtg,2001,795~798
[5]魏修成,刘洋.高精度转换波速度分析.石油勘探与开发,2000,27(2):57~61
[6]毕丽飞,刘江平,王延光等.四参数速度分析法及其在垦71区转换波处理中的应用.中国石油大学学报,2007,31:34~39
[7]李录明,罗省贤.P-SV转换波速度分析及解释方法.石油地球物理勘探,1995,30(1):66~74
[8]Li X-Y and Yuan J.Converted-wave moveout andconversion-point equations in layered VTI media:theory and application.Journal of Applied Geo-physics,2003,54,297~318
[9]黄中玉,朱海龙.转换波叠前偏移技术新进展.勘探地球物理进展,2003,26(3):167~171
[10]王淑荣,毕丽飞,张有芳等.叠前深度偏移及其应用效果分析.石油物探,2005,44(增刊):8~9
[2]石建新,王延光,毕丽飞等.多分量地震资料处理解释技术研究.地球物理学进展,2006,21(2):505~511
[3]毕丽飞,李振春,王延光等.转换波处理中共转换点的定位.勘探地球物理进展,2005,28(5):353~356
[4]Dai H and Li X.Anisotropic migration and modelbuilding for 4-C seismic data:Acase study from Al-ba.Expanded Abstracts of71st SEG Mtg,2001,795~798
[5]魏修成,刘洋.高精度转换波速度分析.石油勘探与开发,2000,27(2):57~61
[6]毕丽飞,刘江平,王延光等.四参数速度分析法及其在垦71区转换波处理中的应用.中国石油大学学报,2007,31:34~39
[7]李录明,罗省贤.P-SV转换波速度分析及解释方法.石油地球物理勘探,1995,30(1):66~74
[8]Li X-Y and Yuan J.Converted-wave moveout andconversion-point equations in layered VTI media:theory and application.Journal of Applied Geo-physics,2003,54,297~318
[9]黄中玉,朱海龙.转换波叠前偏移技术新进展.勘探地球物理进展,2003,26(3):167~171
[10]王淑荣,毕丽飞,张有芳等.叠前深度偏移及其应用效果分析.石油物探,2005,44(增刊):8~9
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