Common-depth-point method for determining and displaying the
shear-velocity reflectivities of a geologic formation
    1.
    发明授权
    Common-depth-point method for determining and displaying the shear-velocity reflectivities of a geologic formation 失效
    用于确定和显示地质构造的剪切速度反射率的共同深度方法

    公开(公告)号:US4534019A

    公开(公告)日:1985-08-06

    申请号:US335437

    申请日:1981-12-29

    IPC分类号: G01V1/30 G01V1/00

    CPC分类号: G01V1/303

    摘要: A novel method for determining and displaying the shear-velocity reflectivities of geologic formations is disclosed wherein a compression-wave common-depth-point seismic-data-gathering technique is utilized to produce both normal incidence compressional-velocity reflectivity sections and shear-velocity reflectivity sections for reflection points in given geologic formations. The subject method includes the gathering of common-depth-point information for a plurality of incidence angles, (theta) and estimating the linear coefficients (R.sub.pp,0 and R.sub.pp,1) of a linear function fitted to the amplitudes vs. sin.sup.2 (theta) measured for each point of reflection. The common-depth-point gather is conducted at angles of offset of less than 20-30 degrees such that assumptions concerning various elastic parameters: density, compressional wave velocity and shear-wave-velocity can be made which allow the application of linear fitting techniques to the gathered data. The sum of these coefficients corresponds to the shear-velocity reflectivity of the reflection point and may be presented with similar data for other points in appropriate shear-reflectivity sections.

    摘要翻译: 公开了一种用于确定和显示地质构造的剪切速度反射率的新方法,其中使用压缩波共同深度点地震数据收集技术来产生正态入射压缩速度反射区和剪切速度反射率 在给定地质构造中的反射点的部分。 主题方法包括收集多个入射角的共同深度信息(θ)并估计拟合到幅度vs. sin2(θ)的线性函数的线性系数(Rpp,0和Rpp,1) )测量每个反射点。 共同深度点集合以小于20-30度的偏移角进行,从而可以进行关于各种弹性参数的假设:密度,压缩波速度和剪切波速度,其允许应用线性拟合技术 到收集的数据。 这些系数的总和对应于反射点的剪切速度反射率,并且可以在适当的剪切反射部分中针对其它点的相似数据给出。

    Method for producing half-tone, variable-density seismic trace recordings
    2.
    发明授权
    Method for producing half-tone, variable-density seismic trace recordings 失效
    生产半色调,可变密度地震记录的方法

    公开(公告)号:US4086600A

    公开(公告)日:1978-04-25

    申请号:US705724

    申请日:1976-07-15

    CPC分类号: G01D15/14 G01D9/34 G01V1/24

    摘要: In a seismic data processing system, seismic data in channel-sequential format intensity modulates the electron beam of a cathode-ray tube. A photographic drum plotter provides a recording of the seismic data displayed on the face of the cathode-ray tube. A screen of multilined squares is placed in contact with the photographic film on the drum plotter so that the seismic data is recorded in a half-tone, variable-density format.

    摘要翻译: 在地震数据处理系统中,通道顺序格式强度的地震数据调制阴极射线管的电子束。 照相鼓式绘图仪提供显示在阴极射线管的表面上的地震数据的记录。 将多边形正方形的屏幕放置在鼓式绘图仪上与照相胶片接触,使得地震数据以半色调,可变密度格式记录。