τ-p变换与偏振分析相结合波场分离方法的研究
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摘要
波场分离是多波多分量地震资料处理的重要环节之一,VSP三分量资料的各种类型的波相互叠加在一起,因此有效地分离出上下行波以及纵横波是VSP资料处理的关键。τ-p变换与偏振分析相结合的波场分离方法能够使地震数据按不同相轴呈点状收敛于不同的区域,用该方法进行VSP波场分离可使能量得到很好收敛,在分离出来的上下波场记录上波形恢复得很好,上下行波、纵横波的相互干扰被完全消除。实际资料处理结果表明,利用该方法分离波场是可行的。
Wave field separation is one of the important parts of seismic data processing in multi-waves and multi-components.Various types of waves are superimposed,which the component data in VSP get together.So one of the key in VSP data processing is to effectively separate up and down waves and P-S wave.The method of wave field separation in the combination of τ-p transform and polarization allows seismic data converging to different regions presenting spots in different phase axis.With the method of VSP wave field separation,the convergence of the energy is very good.And the interference of the up and down waves and P-S wave are completely eliminated;processed result of actual data shows that this method is accurate and valid.
Wave field separation is one of the important parts of seismic data processing in multi-waves and multi-components.Various types of waves are superimposed,which the component data in VSP get together.So one of the key in VSP data processing is to effectively separate up and down waves and P-S wave.The method of wave field separation in the combination of τ-p transform and polarization allows seismic data converging to different regions presenting spots in different phase axis.With the method of VSP wave field separation,the convergence of the energy is very good.And the interference of the up and down waves and P-S wave are completely eliminated;processed result of actual data shows that this method is accurate and valid.
引文
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[2]曾有良,乐友喜,单启铜,等.基于高分辨率Radon变换的VSP波场分离方法[J].石油物探,2007,46(2):115-120.
[3]李录明,罗省贤.多波多分量地震勘探原理及方法[M].成都:成都科技大学出社,1997.
[4]王维红,刘洪.抛物Radon变换法近偏移距波场外推[J].地球物理学进展,2005,20(2):289-293.
[5]张玉芬,周建新.影响空间方向滤波效果的因素分析[J].石油与天然气地质,1999,20(3):212-215.
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