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正演模型计算
相关语句
  “正演模型计算”译为未确定词的双语例句
     The computation of zero-offset VSP forward model,OGP
     零偏移距VSP正演模型计算
短句来源
     The method for computing the zero-offset VSP forward model in the case of horizontal beds is given.
     本文给出一种地层为水平层状情况下,零偏移距的 VSP 正演模型计算方法。
短句来源
     According to the principle that the amplitude of reflection from gasbearing formation increases with the increase of offset, seismic forward modeling was made, and the seismic data were analysed which had been processed using special methods.
     根据含气地层反射振幅随炮检距增加而增大的原理,进行了地震正演模型计算,分析了经过特殊处理后的地震资料。
短句来源
     Finite element method Las been practically applied to the forward modeling of elastic wave. But its shortcomings,such as large storage needed and slow calculation, remain.
     用有限元法做弹性波正演模型计算已进入实用阶段,但有限元法所要求的大存储量和计算速度慢的缺点依然存在。
短句来源
     Finally,the authors have dealt in detail with the conversion coefficient problem of wavelength and depth based on a large number of computations of forward models.
     通过大量的正演模型计算 ,探索了瑞利波波长与对应探测深度之间的转换关系问题
短句来源
  相似匹配句对
     The computation of zero-offset VSP forward model,OGP
     零偏移距VSP正演模型计算
短句来源
     CPU model ;
     计算模型;
短句来源
     COMPUTATIONAL REFLECTIVE ICAl MODEL
     计算反射性ICAI模型
短句来源
     The non-uniqueness of forward model
     正演模型的多解性
短句来源
     We also give a new correction factor to simplify the calculation of the Unstatistic.
     的计算
短句来源
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The method for computing the zero-offset VSP forward model in the case of horizontal beds is given. Its essential steps are (1)to use the velocities and thicknesses of beds to convert the stratigraphic system whose independent variable is depth into the stra- tigraphic system of which the independent variable is one-way tra- vel time; (2)to perform discretization of the stratigraphic system by making use of fixed time interval; (3)to adopt wave equation to construct a transmission network of wave fields in whole...

The method for computing the zero-offset VSP forward model in the case of horizontal beds is given. Its essential steps are (1)to use the velocities and thicknesses of beds to convert the stratigraphic system whose independent variable is depth into the stra- tigraphic system of which the independent variable is one-way tra- vel time; (2)to perform discretization of the stratigraphic system by making use of fixed time interval; (3)to adopt wave equation to construct a transmission network of wave fields in whole stratigraphic system,by which various multiple reflections can be simulated. Examples show that zero-offset VSP forward model can be compu- ted fast and correctly using this method.

本文给出一种地层为水平层状情况下,零偏移距的 VSP 正演模型计算方法。首先,根据地层的速度与厚度,把以深度为自变量的地层系统转化为以单程旅行时为自变量的地层系统,并将地层按等时间间隔离散化。然后,以波动方程为基础,建立整个地层系统波场状态的传递网络。利用这一网络,可模拟各种多次波。实例表明,用此方法计算零偏移距 VSP 正演模型,速度极快且结果准确。

Four exploratory wells drilled on Maoshan anticline penetrate three quite thick sand units in the first member of Quantou formation, each unit consisting of several laminae. Every one of the four wells, except well Lican-1, has no industrial gas flow. The distributions of the three sand units were analysed using both drilling data and seismic data. According to the principle that the amplitude of reflection from gasbearing formation increases with the increase of offset, seismic forward modeling was made, and...

Four exploratory wells drilled on Maoshan anticline penetrate three quite thick sand units in the first member of Quantou formation, each unit consisting of several laminae. Every one of the four wells, except well Lican-1, has no industrial gas flow. The distributions of the three sand units were analysed using both drilling data and seismic data. According to the principle that the amplitude of reflection from gasbearing formation increases with the increase of offset, seismic forward modeling was made, and the seismic data were analysed which had been processed using special methods. It was proved that the gas-bearing sand beds in this area not only have the property which is described in AVO technique but also show interval velocity anomaly and dim spot anomaly. The distributions of the gas-bearing sand beds have been ascertained using seismic data and drilling data.

茅山背斜的4口探井均钻遇泉头组一段三个发育较厚的砂层组,但除梨参1井产工业性气流外,其余3口探井均不产气。为此,利用钻井资料及地震资料追踪了三个砂层组的分布范围。根据含气地层反射振幅随炮检距增加而增大的原理,进行了地震正演模型计算,分析了经过特殊处理后的地震资料。证实本区含气砂岩具有AVO特性显示,并有层速度及平点异常,最后结合钻井资料预测了含气砂岩的分布范围。

Finite element method Las been practically applied to the forward modeling of elastic wave. But its shortcomings,such as large storage needed and slow calculation, remain. It is noted, after a detailed analysis of finite element algorithm,that both stiffness matrix and coupled matrix are symmetrical in special elements,the coupled matrix having transposition character and some specific characters. Square element is used, and the elements multiplied by nodes are merged into discrete time operation, thus doubling...

Finite element method Las been practically applied to the forward modeling of elastic wave. But its shortcomings,such as large storage needed and slow calculation, remain. It is noted, after a detailed analysis of finite element algorithm,that both stiffness matrix and coupled matrix are symmetrical in special elements,the coupled matrix having transposition character and some specific characters. Square element is used, and the elements multiplied by nodes are merged into discrete time operation, thus doubling the calculation speed but halving the storage of global matrixes. An example is given to prove that the fast algorithm is feasible.

用有限元法做弹性波正演模型计算已进入实用阶段,但有限元法所要求的大存储量和计算速度慢的缺点依然存在。本文在深入分析有限元算法的基础上,注意到刚度矩阵,耦合矩阵在特殊单元中的对称性、耦合矩阵具有的转置性及某些特殊特征,采用正方形单元并将与节点相乘的元素归并到时间离散中运算,使计算速度提高一倍,使整体矩阵的存放量减少一半。文中最后给出了一个计算实例,证实该快速算法的正确性。

 
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