多方位Walk-away VSP处理方法
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摘要
从观测系统的定义、抽道集、速度分析、波场分离、纵波和转换波深度域成像等方面对多方位Walk-away VSP资料处理方法进行了讨论。首先利用数据分选技术从三维数据体中抽取不同方位的Walk-away VSP数据;然后通过综合三分量定位处理和中值滤波、f-k滤波、τ-P变换、偏振分析等波场分离方法,将上行反射纵波(P-P波)和转换波(P-SV波)分离出来;最后根据速度分析结果建立速度模型,进行深度域偏移成像,得到纵波和转换波的成像剖面。在垦71井区利用多方位Walk-away VSP资料处理方法获得了很好的成像效果,偏移剖面与高精度三维地震剖面的品质相当。
This paper discussed Multi-azimuth Walk-away VSP data processing in terms of the geometry definition, data extraction, Walk-away VSP velocity analysis, wave-field separation and 1D depth Kirchhoff migration imaging. Firstly, Walk-away VSP was extracted in different azimuth from 3-D data set. Then synthetic 3C processing, median filtering, f-k filtering,τ-P transform and polarization analysis, etc separated the up-going P-wave and PS-converted wave. Finally, depth migration imaging is conducted according to the velocity a-nalysis results and 1D velocity model. Through Multi-azimuth Walk-away VSP data processing, the migrated section had high resolution and SNR in KEN71 well site.
This paper discussed Multi-azimuth Walk-away VSP data processing in terms of the geometry definition, data extraction, Walk-away VSP velocity analysis, wave-field separation and 1D depth Kirchhoff migration imaging. Firstly, Walk-away VSP was extracted in different azimuth from 3-D data set. Then synthetic 3C processing, median filtering, f-k filtering,τ-P transform and polarization analysis, etc separated the up-going P-wave and PS-converted wave. Finally, depth migration imaging is conducted according to the velocity a-nalysis results and 1D velocity model. Through Multi-azimuth Walk-away VSP data processing, the migrated section had high resolution and SNR in KEN71 well site.
引文
1郭建．VSP技术应用现状及发展趋势[J]．勘探地球物理进展,2004,27(1):1-8
2徐仲达,郝晓红,徐翔之等．用VSP数据中下行P-SV转换横波求取横波速度[J]．石油物探,2002,41(3): 274-278
3郅东彪．非零井源距VSP三分量记录的处理[J]．石油物探,1990,29(4):27-32
4李云典,兰永庆．二维波场变换及VSP波场分离[J]．石油物探,1993,32(3):79-86
5高建华．MB2003井区3D-VSP技术攻关试验及效果[J]．石油地球物理勘探,2002,37(专刊):67-78
6鲁传恒,顾贤明．τ-P偏振滤波地震波场分离[J]．石油地球物理勘探,1993,28(5):543-549
7严又生,许增魁,宜明理等．非零井源距VSP资料在煤层气勘探中的应用研究[J]．煤田地质与勘探,2002,30 (2):54-57
8王成礼,焦湘恒．变偏移距VSP方法与效果——N35井实例的研究[J]．石油物探,1992,31(4):11-22
9张卫红,徐亦鸣,刘丽．VSP转换波成像技术及实例分析[J]．石油物探,2003,42(1):42-48
2徐仲达,郝晓红,徐翔之等．用VSP数据中下行P-SV转换横波求取横波速度[J]．石油物探,2002,41(3): 274-278
3郅东彪．非零井源距VSP三分量记录的处理[J]．石油物探,1990,29(4):27-32
4李云典,兰永庆．二维波场变换及VSP波场分离[J]．石油物探,1993,32(3):79-86
5高建华．MB2003井区3D-VSP技术攻关试验及效果[J]．石油地球物理勘探,2002,37(专刊):67-78
6鲁传恒,顾贤明．τ-P偏振滤波地震波场分离[J]．石油地球物理勘探,1993,28(5):543-549
7严又生,许增魁,宜明理等．非零井源距VSP资料在煤层气勘探中的应用研究[J]．煤田地质与勘探,2002,30 (2):54-57
8王成礼,焦湘恒．变偏移距VSP方法与效果——N35井实例的研究[J]．石油物探,1992,31(4):11-22
9张卫红,徐亦鸣,刘丽．VSP转换波成像技术及实例分析[J]．石油物探,2003,42(1):42-48
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