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道拟合
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  trace fitting
     Application of zero-offset seismic trace fitting in time-frequency domain to m arine high-resolution seismic data processing.
     时频域零炮检距地震道拟合技术在高分辨率资料处理中的应用
短句来源
     The real data processing showed so long as the prestack noise- elimination well-done,application of zero-offset seismic trace fitting in time -frequency domain to replace CMP stack is favorable to improve seismic resoluti on and hi-fi of amplitude.
     实际资料处理结果表明 ,只要在叠前做好去噪工作 ,应用时频域零炮检距地震道拟合方法代替水平叠加有利于改善地震资料的分辨率和振幅保真。
短句来源
     For the center of the depression, the key techniques includes prestack zero-phrase processing technique, space-time variant spectrum spread technique, t0 trace fitting technique. The dominate frequencies for S3 and S4 strata on the resulted sections are up to 45 - 50 Hz, and thin sand layers with thickness of 15 - 20 meters can be recognized.
     针对凹陷中央部位研究了叠前零相位处理技术、时空变谱拓展技术及to道拟合技术,有效地提高了地震资料的纵向分辨率,沙三段和沙四段主频达到45-50 Hz,能够识别15-20 m的薄砂层。
短句来源
  “道拟合”译为未确定词的双语例句
     Fitting a zero-offset seismic trace in time-frequency domain.
     时频域零炮检距地震道拟合
短句来源
     Based on analyzing AVO characters of seismic CMP gather and stratigraphic absorption passing different path by different offset signal,the paper discovered that for different frequency component of seismic signal at different offset signal at a certain moment,the relation between frequency and offset x can be described by polynomial and then the technique of fitting a zero offset seismic trace in time frequency domain based on time frequency analysis and fitting of polynomials has been proposed.
     本文在分析地震共中心点道集的 AVO特性 ,以及不同炮检距信号经过不同路径的地层吸收的基础上 ,发现对于某一时刻的不同炮检距地震信号的不同频率成分 ,可以用多项式描述其与炮检距 x的关系 ,进而提出了基于信号时频分析和多项式拟合的时频域零炮检距地震道拟合技术。
短句来源
  相似匹配句对
     On Yi(One)
     “一”
短句来源
     On the Paradoxes of Tao
     的悖论
短句来源
     Determining Straight
     拟合直线
短句来源
     Arc Fitting
     圆弧拟合
短句来源
     APPLICATION OF WELL LOG CONSTRAINED SEISMIC TRACE INVERSION COMBINED WITH POLYNOMIAL FITTING
     井约束地震反演和多项式拟合的联合应用
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How to improve signal to noise ratio and resolution of seismic data is key of seismic data processing. Based on analyzing AVO characters of seismic CMP gather and stratigraphic absorption passing different path by different offset signal,the paper discovered that for different frequency component of seismic signal at different offset signal at a certain moment,the relation between frequency and offset x can be described by polynomial and then the technique of fitting a zero offset seismic trace in time...

How to improve signal to noise ratio and resolution of seismic data is key of seismic data processing. Based on analyzing AVO characters of seismic CMP gather and stratigraphic absorption passing different path by different offset signal,the paper discovered that for different frequency component of seismic signal at different offset signal at a certain moment,the relation between frequency and offset x can be described by polynomial and then the technique of fitting a zero offset seismic trace in time frequency domain based on time frequency analysis and fitting of polynomials has been proposed.Meanwhile,Wiener filter in time frequency domain designed by signal to noise ratio of multi traces signal evaluation overcame the shortcoming of insufficient to suppress noise in ordinary technique of fitting of polynomials.

如何提高地震资料的信噪比和分辨率 ,是地震资料处理中的关键。本文在分析地震共中心点道集的 AVO特性 ,以及不同炮检距信号经过不同路径的地层吸收的基础上 ,发现对于某一时刻的不同炮检距地震信号的不同频率成分 ,可以用多项式描述其与炮检距 x的关系 ,进而提出了基于信号时频分析和多项式拟合的时频域零炮检距地震道拟合技术。同时 ,利用多道信号估算的信噪比来设计的时频域 Wiener滤波器 ,克服了常规多项式拟合技术压制噪声能力不足的缺陷。

Static correction is a difficult problem in seismic exploration in a complicated topography area. To overcome the shortcomings of traditional static correction, a new method for static correction on ground surface by fitting the first breaks of direct waves using polynomial was put forward. Based on the fact that the influence of topography on the arrival of reflected wave is similar to that on the first breaks,and by fitting the first breaks, the difference between real arriving time and the fitted time...

Static correction is a difficult problem in seismic exploration in a complicated topography area. To overcome the shortcomings of traditional static correction, a new method for static correction on ground surface by fitting the first breaks of direct waves using polynomial was put forward. Based on the fact that the influence of topography on the arrival of reflected wave is similar to that on the first breaks,and by fitting the first breaks, the difference between real arriving time and the fitted time was obtained. Then the difference was used in traditional shot static correction and low velocity zone static correction. The application of this method in processing field seismic data from complicated topography area has got a good effect.

在地形复杂地区进行地震勘探 ,静校正是一个普遍的难题 .针对常规静校正方法的不足 ,提出了一种利用多项式拟合单炮记录初至时间作地表静校正的方法 .根据地形起伏对反射波到达时间的影响和对初至时间的影响具有很大的相似性 ,通过拟合单炮记录的初至时间 ,求取该炮各道拟合初至时间与实际初至时间的差值 ,作为该道对应的地表静校正量 ,然后再按常规方法进行炮点校正、低速带校正 .采用该方法对地形复杂地区的实际地震资料进行了处理 ,取得了较好的效果

The function of CMP stack in seismic data processing is to suppress r andom noise and eliminate multiple,but associated disadvantages are decreasing the res olution of seismic data and smearing the amplitude character.In order to impro ve the resolution of seismic data and the hi-fi of amplitude,many researchers have presented variety of fitting methods to replace CMP stack,but each fittin g method has his own shortcomings,such as poor ability of improving S/N.Star ting from application aspect,the paper discussed...

The function of CMP stack in seismic data processing is to suppress r andom noise and eliminate multiple,but associated disadvantages are decreasing the res olution of seismic data and smearing the amplitude character.In order to impro ve the resolution of seismic data and the hi-fi of amplitude,many researchers have presented variety of fitting methods to replace CMP stack,but each fittin g method has his own shortcomings,such as poor ability of improving S/N.Star ting from application aspect,the paper discussed the characters of zero-offset fitting in time-frequency and necessity of application of prestack elimination of different linear interference and multiple to marine high-resolution seismic data processing.The real data processing showed so long as the prestack noise- elimination well-done,application of zero-offset seismic trace fitting in time -frequency domain to replace CMP stack is favorable to improve seismic resoluti on and hi-fi of amplitude.

在地震资料处理中 ,水平叠加的作用是压制随机噪声和消除多次波 ,但伴随的缺点是降低了地震资料分辨率 ,且模糊了振幅特征。为了提高地震资料分辨率和振幅保真 ,许多学者提出了多种拟合方法代替水平叠加。然而 ,这些拟合方法也有其自身的弱点 ,如在提高信噪比方面的能力较弱等。本文从应用角度出发 ,讨论了时频域零炮检距拟合方法的特点及在海上高分辨率地震资料处理中应用叠前消除各种线性干扰和多次波的必要性。实际资料处理结果表明 ,只要在叠前做好去噪工作 ,应用时频域零炮检距地震道拟合方法代替水平叠加有利于改善地震资料的分辨率和振幅保真。

 
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