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restricted inversion
相关语句
  约束反演
     On strategy of seismic restricted inversion
     论地震约束反演的策略
短句来源
     Petroleum geology and geophysical methods are used to conduct restricted inversion, and the detailed reservoir model is finally obtained , the resolution of its wave impedance inversion profile is much higher than that of restricted sparse pulse inversion.
     该方法综合利用石油地质、地球物理等进行约束反演,最终得到详细的储层模型,其波阻抗反演剖面的分辨率明显高于目前广泛使用的约束稀疏脉冲反演结果。
短句来源
  相似匹配句对
     On strategy of seismic restricted inversion
     论地震约束反演的策略
短句来源
     The third is inversion;
     第三是数据的解释以及反演。
短句来源
     On Power Restricted
     论权力制约
短句来源
     On Inversion and Emphasis
     谈英语的倒装与强调
短句来源
     The recursive algorithms of restricted, increased, decreased mode are deduced without the calculation of the inversion.
     分别导出了RKRLS和RSVM算法在限定、增长和缩减记忆模式下的递推公式,均无需进行求逆计算。
短句来源
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  restricted inversion
The anisochronicity of signals observed is due to the restricted inversion of the seven-membered cycle.
      


The theoretical analysis of random inverse method for wave impedance inver-sion leads to the conclusion that random inverse method is one damping least squaremethod, which, however, is not general damping least square method becausedamping item λ=σ2n/σ2m has its own physical meaning. Applying adaptive algorithmto this damping item achieves nicely quantitative restriction for solving space inwave impedance inversion. Model parameter variance restricts inversion result tomake widely-restricted inversion...

The theoretical analysis of random inverse method for wave impedance inver-sion leads to the conclusion that random inverse method is one damping least squaremethod, which, however, is not general damping least square method becausedamping item λ=σ2n/σ2m has its own physical meaning. Applying adaptive algorithmto this damping item achieves nicely quantitative restriction for solving space inwave impedance inversion. Model parameter variance restricts inversion result tomake widely-restricted inversion solution range in the reasonable interval of geo-physical parameters. The real inversion example using multihole restriction is giv-en, and the restriction condition for wave impedance inversion is analysed particu-larly.

本文从理论上对波阻抗反演的随机逆解法进行了分析推导,认为随机逆解法是一种阻尼最小二乘法,且因阻尼项λ=σ2n/σ2m有其本身的物理意义,决定了它又不是普通意义下的阻尼最小二乘法。通过对该阻尼项采用自适应算法,解决了波阻抗反演中对解空间的定量约束问题;并用模型参数方差对反演结果进行约束,使宽带约束反演的解限制在合理的地球物理参数范围之内。文中给出了利用多口井进行约束反演的实例,特别对波阻抗反演的约束条件进行了研究。

The existing borehole-restricted inversion methods, such as SLIM, BCI,ROVIM and so on, usually consist of the following steps:. Synthetic selsmogram is forward obtained by using convolution model afterwe repeatedly modify not only the wave impedance and thickness of formation butalso wavelet, then it is taken to estimate its errors to a real seismic trace-. Make perturbation, in terms of these errors, to revise wave impedance mod-el until the errors reduce to minimum.However, the inversion of high-frequency...

The existing borehole-restricted inversion methods, such as SLIM, BCI,ROVIM and so on, usually consist of the following steps:. Synthetic selsmogram is forward obtained by using convolution model afterwe repeatedly modify not only the wave impedance and thickness of formation butalso wavelet, then it is taken to estimate its errors to a real seismic trace-. Make perturbation, in terms of these errors, to revise wave impedance mod-el until the errors reduce to minimum.However, the inversion of high-frequency informations is not correct becausehigh-frequency seismic informations are usually unreliable. It is proved that high-frequency seismic informations outside effective frequency band will always result inmultiple solutions, without any useful restriction. High-frequency informations cannot be checked reasonably by convolution model.An easy logging-restricted inversion method is recommended here. Its principleinvolves the following essential points:. The wave impedance informations of mid-frequency seismic contents in effec-tive seismic frequency band are obtained by using ordinary Seislog, Glog methodsand so forth.. The wave impedance informations of low- and high-frequency seismic con-tents can be derived only from interpolation and extrapolation of logging data, andherewith the interpolatlon direction is controlled only by horizon informations ofseismic data.. Three wave impedance sections corresponding to low-, mid- and high-fre-quency seismic contents are combined to form the final inversion result.

当前有井约束反演方法(如SLIM,BCI,ROVIM等)多采用以下步骤:①通过逐步修改地层波阻抗值及其厚度值和子波,然后用褶积模型正演出合成地震记录,求其与实际地震道之间的误差;②根据此误差,再作摄动,修改波阻抗模型,直到误差趋于最小为止。然而,由于地震资料的高频信息往往不可靠,故对高频信息的反演是不准确的。本文证明,有效频带之外的地震高频信息永远是多解的,而且是无约束力的。因为高频信息不能通过褶积模型作出合理的检验。文中提供了一种测井约束的简易可行的反演方法。其基本思路是:①在地震资料的有效频带范围内,采用常规的Seislog、Glog等方法,得到地震数据中的中频成分的波阻抗信息;②有关低频和高频成分的波阻抗信息只能由测井资料的内括和外推获得,此时只利用地震资料的层位信息控制内播方向;③将低、中、高频三条渡阻抗剖面相加,得到最终反演结果。

To ascertain the structural details, reservoir geometry, regular hydrocarbon distribution in T2×1 region by not only using the drilling and log data but also doing reasonable development seismic exploration is an important matter which we must achieve in rolling exploration in the region. Horizontal reservoir prediction in this region has been finished in following steps. Preliminary work was conducted, which included the construction of 3-D velocity field, the comparison between log curve and synthetic seismogram...

To ascertain the structural details, reservoir geometry, regular hydrocarbon distribution in T2×1 region by not only using the drilling and log data but also doing reasonable development seismic exploration is an important matter which we must achieve in rolling exploration in the region. Horizontal reservoir prediction in this region has been finished in following steps. Preliminary work was conducted, which included the construction of 3-D velocity field, the comparison between log curve and synthetic seismogram (or seismic traces ), and log-restricted inversion. The migrated data volumes of high and low frequency seismic data were produced by taking different processing methods, and they were used in detailed structure interpretation. Accurate structural map was drawn after time-depth conversion using varying velocity.Hydrocarbon prediction was done by introducing 8 kinds of seismic characteristic parameters which are sensitive to hydrocarbon existence.Development boreholes were designed by overall considerations of some factors in structure, reservoir, hydrocarbon prediction and so on.Prediction result was checked by three boreholes, which found maximum error of 11m and minimum error of 3m.

充分结合已有的钴井、测井等信息,合理应用开发地震,查清T2×1区块的构造细节、储集体几何形态、油气分布规律是在该区滚动开发中急需解决的问题。本文首先从建立三维空变速度场、进行测井曲线与合成记录和地震道对比、测并约束反演入手,利用由不同处理方法获得的高、低频偏移成果数据体,进行精细构造解释,采用变速时深转换成图法,得到高精度的构造图;然后利用对油气反映敏感的8种地震特征参数进行油气检测。最后综合考虑构造、储层、油气检测等方面的因素,部署开发并。经三口井证实,最大误差为11m,最小误差为3m。

 
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