井间三分量检波器方位估算
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摘要
井间三分量检波器的方位确定是井间资料处理的关键。井间地震观测通常采用分扇区的观测方式,其共检波点道集中的初至波应该具有相同的偏振轴。因而,可以在共检波点道集中,首先计算各道直达波的偏振系数,再用偏振系数作为权系数,采用加权最小二乘算法直接计算出检波器坐标中的主偏振方向,以此准确估算出检波器方位。这种处理方式能得到稳定可靠的井间波场水平径向分量和切线分量。
The orientation of crosswell 3-D component geophone is critical to processing of crosswell seismic data.Crosswell seis- mic observations are usually based on sectors.First arrivals in common receiving gather should have the same axis of polariza- tion.Thus in common receiving gathers,firstly calculate the polarization coefficient of direct wave for each trace,and then use the resulted coefficients as weights to determine the main polarization direction in detector coordinates via weighted least square method,and finally,orientations of geophones are esti- mated.This method can yield reliable horizontal radial compo- nent and tangent component of crosswell wavefield.
The orientation of crosswell 3-D component geophone is critical to processing of crosswell seismic data.Crosswell seis- mic observations are usually based on sectors.First arrivals in common receiving gather should have the same axis of polariza- tion.Thus in common receiving gathers,firstly calculate the polarization coefficient of direct wave for each trace,and then use the resulted coefficients as weights to determine the main polarization direction in detector coordinates via weighted least square method,and finally,orientations of geophones are esti- mated.This method can yield reliable horizontal radial compo- nent and tangent component of crosswell wavefield.
引文
1郭全仕，邬达理，唐金良等．井间地震反射波成像技术探讨[J]．石油物探，2005，44(5)：439～444
2 Campbell A J.Tube wave attenuation by polarization filtering[J].Expanded Abstracts of the 62~(nd) Annual Internat SEG Meeting,1992,99～102
3朱光明．垂直地震剖面方法[M]．北京：石油工业出版社，1988．404
4 DiSiena J P,Gaiser J E.Three-component vertical seismic profile:An application of Gal'perin's polarization-position correlation technique[J].Expanded Abstracts of the 53~(rd)Annual Internat SEG Meeting,198a,522～524
5 de Montmollin V.Three-component vertical seismic profile:Geometrical processing and waveidentification[J].Expanded Abstracts of the 53~(rd) Annual Internat SEG Meeting,1983,524～527
6黄中玉，谈大龙，徐亦鸣等．多分量地震数据矢量保真度分析[J]．石油物探，2005，44(3)：206～208
7 Benhama A,Cliet C,Dubesset M.Study and applications of spatial directional filtering in three-component recomings[J].Geophysical Prospecting,1988,31(6):591～613
2 Campbell A J.Tube wave attenuation by polarization filtering[J].Expanded Abstracts of the 62~(nd) Annual Internat SEG Meeting,1992,99～102
3朱光明．垂直地震剖面方法[M]．北京：石油工业出版社，1988．404
4 DiSiena J P,Gaiser J E.Three-component vertical seismic profile:An application of Gal'perin's polarization-position correlation technique[J].Expanded Abstracts of the 53~(rd)Annual Internat SEG Meeting,198a,522～524
5 de Montmollin V.Three-component vertical seismic profile:Geometrical processing and waveidentification[J].Expanded Abstracts of the 53~(rd) Annual Internat SEG Meeting,1983,524～527
6黄中玉，谈大龙，徐亦鸣等．多分量地震数据矢量保真度分析[J]．石油物探，2005，44(3)：206～208
7 Benhama A,Cliet C,Dubesset M.Study and applications of spatial directional filtering in three-component recomings[J].Geophysical Prospecting,1988,31(6):591～613
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