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integrated inversion
相关语句
  联合反演
     Then the model is modified according to the inversions of gravity, magnetism, MT and seismic data. Finally, a modified comprehensive model is obtained by the integrated inversion of all the available geophysical data.
     在统一的物理 -地质模型之上 ,进行重、磁、电、震单一方法的反演 ,分析各种物探方法反演结果的相容性与相背性 ,重新修改模型并进行重、磁、电、震的联合反演 ,最终确定深部地层的地质属性。
短句来源
     The multi-solution of inversion by single parameter and layer-labeling uncertainty are two difficult points that restricted the precision of reservoir prediction in complex fault block zone,which can be avoided to a certain degree by using multi-parameter integrated inversion.
     单参数反演引起的反演结果多解性和层位标定的不确定性一直是影响复杂断块地区储层预测精度的两大难点 ,而多参数联合反演在一定程度上避免了多解性问题。
短句来源
     This method breaks through intensively used gravity-magnetic-electric-seismic combined profile inversion mode, realizes integrated inversion of plane gravity-magnetic -electric-seismic statistical inference.
     该方法突破了目前广为使用的重磁电震剖面联合反演模式,实现了平面重磁电震统计推断联合反演
短句来源
  整体反演
     2D TM DATA INTEGRATED INVERSION
     二维大地电磁数据的整体反演
短句来源
  相似匹配句对
     The integrated O. D. (I.O.D.)
     在IBAS图象分析仪上,测量各杂交点自显影曝光斑的积分光密度值(I.O.D.)
短句来源
     Integrated management of priority inversion
     优先级倒置问题的集成资源管理技术
短句来源
     Overview of Joint Inversion of Integrated Geophysics
     综合地球物理联合反演综述
短句来源
     On inversion and Emqhasis
     谈倒装与强调
短句来源
     Integrated Learning
     集成学习
短句来源
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  integrated inversion
In addition to determining the regional stress field, the integrated inversion of focal mechanisms and HTPF data help identify the fault plane for each for each of the focal mechanisms.
      
Deep and Shallow Solid-Earth Structures Reconstructed with Sequential Integrated Inversion (SII) of Seismic and Gravity Data
      


This paper introduces a new procedure for P-wave velocity imaging from reflection seismic data based on integrated inversion techniques. After deconvolution, stacking and migration, interpretors may distinguish the events between primary reflections and other events on a seismic section. Therefore, it is possible to obtain traveltime data and a statistical estimate of the wavelet W(t) from both CSP gathers and zero-offset sections by using an interactive workstation. If the dips of formations in the studied...

This paper introduces a new procedure for P-wave velocity imaging from reflection seismic data based on integrated inversion techniques. After deconvolution, stacking and migration, interpretors may distinguish the events between primary reflections and other events on a seismic section. Therefore, it is possible to obtain traveltime data and a statistical estimate of the wavelet W(t) from both CSP gathers and zero-offset sections by using an interactive workstation. If the dips of formations in the studied area are gentle, then the traveltime data T(x, t) can be picked up from common source-receiver seismic traces on a stacked seismic section.The traveltime data are insufficient for velocity imaging because there exist infinite solutions which can fit the data. We use both the traveltime and RMS velocity data to construct a joint inversion procedure. The first step in this procedure is to redo velocity analysis which keeps consistence between picked primary reflections and RMS velocity data V(x', t), where x' represents the position of the velocity analysis traces. In order to guarantee the. vertical resolution of velocity imaging, the spacing of the velocity analysis should be less than 21 CDP traces, and depending on the thickness of target layers; the time intervel in the analysis should be less than 21 ms.The second step is joint inversion of traveltime data and RMS velocities for velocity analysis traces, producing intervel velocity and layer thickness via generalized inversion techniques. The equations in the joint inversion procedure can be represented as follows:*=1 wherec1 = interval velocity of the i-th layer,Vj = RMS velocity data at time tj,△T1 = T1 - T1-1, the diffirence of traveltimes between adjacent reflectors,δVi = errors in the RMS velocity data.After this equation is solved by employing a generlized inversion technique, the thickness of each layer can be calculated easily. This joint inversion method has been tested by synthetic models, having vertical resolution of 60 m and interval velocity variance about ± 100 m/s. In the areas lacking wells, the inversion results, acting like acoustic logging data, provide satisfactory constraints for quality control of velocity imaging.The third step in the imaging procedure estimates the velocity variations in each section-block between adjacent velocity-analysis traces via inversion of traveltime T(x, t) and the resulted interval velocity data c(x', z) on the block boundaries. Various techniques in computed tomography and wave equation inversion may be used for velocity reconstruction in a sectio-block. For instance, an 2-D scalar wave equation may be reduced to the eikonal equation via. WKJB approximation, then discrete reconstruction algorithms, e. g. ART or SIRT in computed tomography, may be applied. By employing the "Exploding reflector" model, the 2-D scalar wave equation can be written as:wherevi(x) = continuous effective velocity for the i-th interface, can be calculated via c(x' , z), P(x, z) = pseudo-source term representing velocity discontinuities on reflectors, W(t) = source signiture obtained from wavelet processing.In order to determine the velocity discontinuity P(x, z) which is actually a singular function of the velocity function c(x, z), we need singularity inversion techniques to solve the source-term inverse problems of partial differential equations. Finally, a discretized image of c(x, z) can be obtained from P(x, z) and vi(x).The above mentioned procedure of velocity imaging has been tested by a few drilling wells in a sedimentary basin in western China. The results (see enclosed color photos) shows a positive relation between velocity images and variation of lithology, giving distinguished indications of obscure traps for locating oil and gas deposits.

本文介绍了根据反射地震数据进行波速成象的一种方法,其基础为多种反演技术的综合。由于要求的波速图象C(x,z)具有间断性,除利用走时数据T(x,t)外,在地层比较水平的情况下,还利用了均方根速度V(x,t)和统计子波W(t)的数据来成象。计算机层析成象过程分为三步:首先重做速度分析,取得与初次反射走时一致的均方根速度数据;然后用反射走时与均方根速度联合反演对应分析道的层速度和界面深度;最后由联合反演结果和反射面走时求波速图象函数的数字化版。文中还给出了波速成象方法在我国西北某沉积盆地上的应用及验证结果。

Some important methods and main results from studies of physics and evolution of the Earth's interior were reviewed in this paper, with an emphasis on the areas such as geophysical equations of state, seismic tomography, integrated inversions, high temperature and high pressure experiments, and their comparative studies. The most updated findings have demonstrated that the Earth's interior is heterogeneous and anisotropic, even though the homogeneous, isotropic, and symmetric spherical model nowadays...

Some important methods and main results from studies of physics and evolution of the Earth's interior were reviewed in this paper, with an emphasis on the areas such as geophysical equations of state, seismic tomography, integrated inversions, high temperature and high pressure experiments, and their comparative studies. The most updated findings have demonstrated that the Earth's interior is heterogeneous and anisotropic, even though the homogeneous, isotropic, and symmetric spherical model nowadays can be still taken as a reference model. The lateral heterogeneity is mainly found in the upper mantle, while the lower mantle and the outer core of liquid state seem to be relatively homogeneous. The core mantle boundary (CMB) transition zone (D″), however, is most likely a heterogeneous chemical boundary layer embedded in a thermal boundary layer, with a temperature drop of several hundred degrees, where its topographic undulation and lateral heterogeneity will affect the spherical symmetry of the Earth model. Results from 3 D seismic tomography reflect, in practice, the relationship between velocity and temperature anomalies, whereas the temperature variations further lead to an anomalous change in density, and hence, the parameter density is one of essential control factors in mantle convection modeling.

本文综述研究地球内部结构和物理特性的几种常规方法和主要研究结果,并首重讨论地球物理状态方程、地震成象、综合反演、高温高压实验和有关对比研究方法。均匀各向同性球对称地球模型仍不失其参考意义,但最新研究结果表明,地球内部状态是非均匀和各向异性的。横向不均匀性主要表现在上地幔部分,下地幔和液态外核似乎比较均匀,但核幔边界过渡带(D″)可能代表一个内含非均匀化学边界的热边界层,其形态起伏和横向变化影响地球模型的球对称性。3D地震成象实质上反映地震波速与温度异常的关系,而温度变化又会引起密度异常,因而密度变化是控制地幔对流的关键参数之一。

Physical properties of rocks, velocity, density, magnetic susceptibility and resistivity are analyzed statistically to look into their inherent relationships. First, various useful information is used to establish a comprehensive physical geological model. Then the model is modified according to the inversions of gravity, magnetism, MT and seismic data. Finally, a modified comprehensive model is obtained by the integrated inversion of all the available geophysical data.

首先对岩石的速度、密度、磁化率、电阻率等物性资料进行统计分析 ,寻找它们之间的内在联系 ,在此基础上综合各种有用信息建立统一的物理 -地质模型。在统一的物理 -地质模型之上 ,进行重、磁、电、震单一方法的反演 ,分析各种物探方法反演结果的相容性与相背性 ,重新修改模型并进行重、磁、电、震的联合反演 ,最终确定深部地层的地质属性。

 
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