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sv转换波
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  sv wave
     Meanwhile,the process of using the approximate formula for lithologic parameter inversion has been deeply discussed from three aspects separately:converted wave reflectivity in different representative forms,AVO weighted stack method for P SV converted wave and AVO simultaneous inversion of PP wave and P SV wave.
     以新的近似公式为基础 ,文中分别从不同岩性参数表示的转换波反射系数、P- SV转换波的 AVO加权叠加方法及 P- P波和 P- SV波AVO联合反演等三个方面深入讨论了利用该近似公式进行岩性参数反演的过程
短句来源
     ·The horizontal component of sea bottom particle viberation only has elastic waves, which indicates that the horizontal component favours the receiving of SV wave, such as P SV converted wave.
     (2 )海底质点运动的水平分量中只存在弹性波 ,没有水柱混响 ,表明海底水平分量有利于接收SV波 ,例如 P- SV转换波
短句来源
     In transformed wave seismic prospecting, people have to give attention both to P wave and SV wave sections, accurately and rationally select offsets of P-SV transformed waves are the key points.
     在转换波地震勘探中要兼顾P波及P—SV波剖面,关键在于准确合理地选择P—SV转换波的偏移距。
短句来源
  “sv转换波”译为未确定词的双语例句
     P-SV wave exploration and its application.
     P-SV转换波勘探和应用
短句来源
     AVO weighted stack inversion of P-SV converted wave.
     P-SV转换波AVO加权叠加反演
短句来源
     P-SV converted wave reflection coefficient and field acquisition geometry design
     P-SV转换波反射系数与野外采集观测系统设计
短句来源
     A Quantitative Study on Coal Seam P-SV Transformed Wave Offsets
     煤层P—SV转换波偏移距问题的定量研究
短句来源
     on the contrary,direct inversion of shear modulus Δμ/μ and fluid factorΔ(μρ)/(μρ) not only has high precision but also has stable inversive results,being adaptable to AVO parameters inversion of P-SV converted wave and multi-wave.
     若直接反演剪切模量Δμ/μ和Δ(μρ) / (μρ)型流体因子 ,则不仅具有很高的精度 ,而且反演结果稳定 ,适用于 P- SV转换波和多波 AVO参数反演。
短句来源
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  相似匹配句对
     Prestack migration of converted P-SV wave,
     转换P-SV叠前偏移
短句来源
     P-SV wave exploration and its application.
     P-SV转换勘探和应用
短句来源
     Acquisition, processing and interpretation of P-SV converted waves
     P-SV转换的观测、处理和解释
短句来源
     STATICS OF CONVERTED WAVE
     转换的静校正
短句来源
     AVO weighted stack inversion of P-SV converted wave.
     P-SV转换AVO加权叠加反演
短句来源
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  sv wave
Shear wave splitting, SV wave cusps and elastic wave reflection and transmission are also observed.
      
There exists three kinds of dilatational waves and a Shear Vertical (SV) wave in a two-dimensional model of the solid.
      
If we consider the SH wave (or the SV wave) separately, then a false plane front set arises in this region.
      
Simulation of the hydrocarbon structures using the P-SV wave solution
      
A numerical finite-difference modeling program has been developed for the P-SV wave using the above solution.
      
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Practical significance of application of P-VS converted waves in the shear wave method and in the P and S waves combination method are discussed. There are some special requirements during stages of acquisition, processing and interpretation. In general, converted waves are stronger around and beyond the critical angle. In view of the asymmetry of P-SV raypaths, a modified trace gathering scheme is proposed. The travel time curve for a P-SV wave is nearly hyperbolic, and the velocity derived therefrom takes...

Practical significance of application of P-VS converted waves in the shear wave method and in the P and S waves combination method are discussed. There are some special requirements during stages of acquisition, processing and interpretation. In general, converted waves are stronger around and beyond the critical angle. In view of the asymmetry of P-SV raypaths, a modified trace gathering scheme is proposed. The travel time curve for a P-SV wave is nearly hyperbolic, and the velocity derived therefrom takes both P and SV raypaths into account. This is a"composite" velocity which will be used for NMO corrections the same way as those done for P-P wsves.

本文讨论P-SV转换波在横波勘探和纵横波联合勘探中的实用价值,以及P-SV转换波对野外观测、资料处理和解释的特殊要求。一般在临界角及大于临界角附近,才能观测到最强的P-SV波。基于P-SV波的入射和反射路径的不对称性,提出一种适用于P-SV波的选排方法。P-SV波的时距曲线仍然是一条近似的双曲线,但它包含着纵波和横波的双重影响,由此得到的速度称为复合速度,可用于动校正和叠加。

A simultaneous detection of P wave and P-SV converted wave is made using constant offset on a 2-D organic glass model consisting of anticline,fault and horizontal reflector.Not only quite clear P-SV waves are recorded but also converted diffractions are obtained for the first time. The following points are drawn from the experiment: (1)the structural configuration shown by P-SV waves is similar to that shown by P waves,which indicates that converted waves can be used to prospect for hydrocarbon or to check the...

A simultaneous detection of P wave and P-SV converted wave is made using constant offset on a 2-D organic glass model consisting of anticline,fault and horizontal reflector.Not only quite clear P-SV waves are recorded but also converted diffractions are obtained for the first time. The following points are drawn from the experiment: (1)the structural configuration shown by P-SV waves is similar to that shown by P waves,which indicates that converted waves can be used to prospect for hydrocarbon or to check the P wave exploration results; (2)both P wave and P-SV wave can also be recorded at the off- set which is less than,or equal to the reflector depth,this offset being much smaller than the theoretical distance which was considered to be 1—3 times the reflector depth; (3)the frequency corresponding to the peak amplitude of P-SV wave is lower than that of P wave,but their frequency bandwidths are nearly equal; (4)the velocity of P-SV wave is lower so that its resolution is higher.

在用有机玻璃制成的背斜和断层二维模型上,采用等炮检距的特殊观测方法,进行了 P 波和 P—SV 转换波的同时观测。结果获得了相当清晰的 P—SV 转换波,并首次获得了转换绕射波。初步的分析研究表明:P—SV 转换波所反映的构造形态与 P 波所反映的构造形态相似,这说明可以用转换波进行勘探,也可用来印证 P 波的结果;在小于或等于界面埋深的炮检距上可同时观测到 P波和 P—SV 波,这比理论研究认为要在1~3倍界面埋深的距离上才能观测到P—SV 波的距离要小,P—SV 转换波的主频低于纵波,频谱宽度相近;P—SV转换波的速度低于纵波,其分辨能力应强于纵波。

By Geophysical Tomography, it is meant inversion which presents a linear integral relationship between the data observed and formation parameters. The paper introduces that based on seismic reflection data, the inversion can be performed for 3-D subsurface structure and by the same token it can come true for the imaging of velocity by seismic ray tomography with the continuous curved surface in homogeneous, isotropic layered media. The forward modelling is performed by ray-tracing based on Fermat's principle,...

By Geophysical Tomography, it is meant inversion which presents a linear integral relationship between the data observed and formation parameters. The paper introduces that based on seismic reflection data, the inversion can be performed for 3-D subsurface structure and by the same token it can come true for the imaging of velocity by seismic ray tomography with the continuous curved surface in homogeneous, isotropic layered media. The forward modelling is performed by ray-tracing based on Fermat's principle, i.e. to determine the intersection of rays and interfaces by solving the non-linear coupled equation from the least time principle. The purpose of performing seismic C-T technique is to find an earth model where the travel time residuals of calculated data and observed data are minimized. In normal practice, the way we obtain the correction of the updated value of model parameters from travel time residuals is by solving a damped least square problem and then processing it iteratively until we are happy with the result turned out.

观测数据与地层参数之间呈线积分关系的反演称作地球物理层析成像。本文介绍在连续曲界面均匀各向同性层状介质情形下,根据地震反射资料反演三维地层结构及地震速度的地震射线层析成像方法。正演模型射线追踪是根据Fermat原理实现的,即求解由时间最小原理列出的非线性方程组得到射线与界面的交点。反演的目标就是求解这样的地层模型,使其射线追踪走时与观测走时的残差为极小。具体做法是根据走时残差求取模型参数修正量的阻尼极小二乘解,循环迭代直至满足要求为止。 文中给出了两个合成资料反演的例子。一个是合成的P波走时数据(加随机噪声)的反演,其结果与真实模型能较好吻合。另一个例子则同时考虑P波及反射P—SV转换波走时,反演包括P波速度和SV波速度对三维速度结构。利用P—SV波进行P波和SV波速度结构的成像是本文的一个进步。

 
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