Method of deriving statics corrections from common reflection point
gathers
    3.
    发明授权
    Method of deriving statics corrections from common reflection point gathers 失效
    从普通反射点聚集得到静态校正的方法

    公开(公告)号:US5157638A

    公开(公告)日:1992-10-20

    申请号:US819894

    申请日:1992-01-13

    IPC分类号: G01V1/36

    CPC分类号: G01V1/362 G01V2210/53

    摘要: A method for static correction includes a three step process which eliminates the problems of assuming hyperbolic moveout curves and forming base traces from common midpoint gathers while addressing long spatial wavelength variations. First, after calculating and applying an approximate high-frequency static correction to the individual shot and receivers (using traditional automatic methods), depth migration iterations are employed to coarsely tune the near-surface velocity layer. Second, after applying this correction, the remaining statics are incorporated into the model by tomography, which accounts for the velocity and thickness of the weathering layer and buried anomalies. Third, any residual misalignments are addressed using a multi-windowed statics adjustment within the common image point (CIP) gathers.

    摘要翻译: 一种用于静态校正的方法包括三步骤处理,其消除了假定双曲线偏移曲线和从共同的中点聚集形成基本轨迹同时解决长空间波长变化的问题。 首先,在对单个射击和接收机(使用传统的自动方法)计算并应用近似的高频静态校正之后,采用深度偏移迭代来粗调近表面速度层。 其次,应用该修正后,剩余的静力学通过层析成像纳入模型,这说明了风化层的速度和厚度以及埋藏异常。 第三,在普通图像点(CIP)聚集中使用多窗口静态调整来解决任何残留的未对齐。