公开(公告)号：US4926392A

公开(公告)日：1990-05-15

申请号：US143927

申请日：1988-01-14

申请人： George E. Handley ,  A. M. Moore ,  Robert E. Dickman

发明人： George E. Handley ,  A. M. Moore ,  Robert E. Dickman

IPC分类号： G01V1/28 ,  G01V1/37

CPC分类号： G01V1/37 ,  G01V1/28 ,  G01V2210/20

摘要： A method and apparatus for obtaining seismic vibrator reflection data is disclosed with a significant signal to noise ratio. The earth is sinusoidally vibrated with source vibrations linearly varying over time. The amplitudes of the reflections from the subsurface strata interfaces are sensed and multiplied by the amplitude of the source vibrations, resulting in a first representation of the product as a function of time. A second representation of the product is calculated in association with negative values of time, such that phase consistency between the two representations is maintained. The two representations are then mathematically combined, with values of zero associated with all other values of time. The two representations are then linearly transformed into a function of frequency, and loaded into an array for computer operation. An inverse Fourier transform is the performed on the combined representations as a function of frequency, resulting in a timedomain representation of the combined representations indicating the delay times between the source vibrations and the sensed reflections. After various mathematical steps, the waveform is displayed in a form adapted to geophysical analysis.

摘要翻译： 公开了一种获得地震振动器反射数据的方法和装置，具有显着的信噪比。 地球正弦振动，随着时间的推移线性变化。 来自地下层界面的反射振幅被感测并乘以源振动的振幅，导致乘积作为时间的函数的第一表示。 与时间的负值相关联地计算产品的第二表示，使得维持两个表示之间的相位一致性。 然后数学地组合两个表示，与所有其他时间值相关联的值为零。 然后将两个表示线性地转换成频率的函数，并将其加载到用于计算机操作的阵列中。 作为频率的函数对组合表示执行逆傅里叶变换，导致表示源振动和感测反射之间的延迟时间的组合表示的时域表示。 经过各种数学步骤后，波形以适合于地球物理分析的形式显示。