公开(公告)号：EP0400776A3

公开(公告)日：1991-10-30

申请号：EP90301918.0

申请日：1990-02-22

申请人： HALLIBURTON GEOPHYSICAL SERVICES, INC.

发明人： Sanders, Joe I. ,  Shuck, Edward L. ,  Monk, David J.

IPC分类号： G01V1/38

CPC分类号： G01V1/3808 ,  G01V1/364 ,  G01V2210/3246

摘要： A marine seismic surveying method utilizes two vertically spaced marine streamers (18,20) each having a plurality of seismic detectors (22,24) contained therein, and a seismic energy source (16) positioned at or near the surface (38) of a body of water (10) to generate seismic waves (30,32,34) which propagate into earth formations (26,28) below the water and reflect back up to be detected at each streamer. Seismic waves also reflect from the water/air interface back down toward the streamers. The seismic waves detected at two selected vertically displaced seismic detectors (22,24) are combined to form a sum signal which is then combined with a scaled time integral of a difference signal to form a resultant signal which preserves either the upgoing or downgoing seismic waves. In a preferred embodiment of the present invention, the sum signal and the integral signal are both filtered to remove DC bias and low frequency components prior to the combination. Additionally, the time integral of the difference signal is preferably scaled by balancing the power therein with the power in the sum signal, thereby automatically adjusting for variations in detector spacing which may occur. In one embodiment of the present invention, the upgoing signal and downgoing signal are time shifted and combined to maximize the resultant signal-to-­noise ratio.

公开(公告)号：EP0400775A2

公开(公告)日：1990-12-05

申请号：EP90301917.2

申请日：1990-02-22

申请人： HALLIBURTON GEOPHYSICAL SERVICES, INC.

发明人： Sanders, Joe I. ,  Shuck, Edward L. ,  Monk, David J.

IPC分类号： G01V1/38 ,  G01V1/36

CPC分类号： G01V1/3808 ,  G01V1/364 ,  G01V2210/3246

摘要： A marine seismic reflection prospecting method and system in which coherent noise is attenuated through reinforcement of primary reflection data by the addition of corrected ghost reflection data. The system includes a seismic energy source, a detector, a wavefield separator, a time-shift element, and an element for generating an output signal representative of an additive linear combination of time-aligned primary and ghost signal components. The system's output is suitable for further pre-stack processing, e.g. NMO correction.

摘要翻译： 一种海洋地震反射探测方法和系统，其中通过增加校正的重影反射数据通过增强主反射数据来衰减相干噪声。 该系统包括地震能量源，检测器，波场分离器，时移元件和用于生成表示时间对准的主信号分量和虚反射信号分量的加性线性组合的输出信号的元件。 该系统的输出适用于进一步的预堆叠处理，例如， NMO修正。

公开(公告)号：EP0400775A3

公开(公告)日：1991-10-30

申请号：EP90301917.2

申请日：1990-02-22

申请人： HALLIBURTON GEOPHYSICAL SERVICES, INC.

发明人： Sanders, Joe I. ,  Shuck, Edward L. ,  Monk, David J.

IPC分类号： G01V1/38 ,  G01V1/36

CPC分类号： G01V1/3808 ,  G01V1/364 ,  G01V2210/3246

摘要： A marine seismic reflection prospecting method and system in which coherent noise is attenuated through reinforcement of primary reflection data by the addition of corrected ghost reflection data. The system includes a seismic energy source, a detector, a wavefield separator, a time-shift element, and an element for generating an output signal representative of an additive linear combination of time-aligned primary and ghost signal components. The system's output is suitable for further pre-stack processing, e.g. NMO correction.

公开(公告)号：EP0400776A2

公开(公告)日：1990-12-05

申请号：EP90301918.0

申请日：1990-02-22

申请人： HALLIBURTON GEOPHYSICAL SERVICES, INC.

发明人： Sanders, Joe I. ,  Shuck, Edward L. ,  Monk, David J.

IPC分类号： G01V1/38

CPC分类号： G01V1/3808 ,  G01V1/364 ,  G01V2210/3246

摘要： A marine seismic surveying method utilizes two vertically spaced marine streamers (18,20) each having a plurality of seismic detectors (22,24) contained therein, and a seismic energy source (16) positioned at or near the surface (38) of a body of water (10) to generate seismic waves (30,32,34) which propagate into earth formations (26,28) below the water and reflect back up to be detected at each streamer. Seismic waves also reflect from the water/air interface back down toward the streamers. The seismic waves detected at two selected vertically displaced seismic detectors (22,24) are combined to form a sum signal which is then combined with a scaled time integral of a difference signal to form a resultant signal which preserves either the upgoing or downgoing seismic waves. In a preferred embodiment of the present invention, the sum signal and the integral signal are both filtered to remove DC bias and low frequency components prior to the combination. Additionally, the time integral of the difference signal is preferably scaled by balancing the power therein with the power in the sum signal, thereby automatically adjusting for variations in detector spacing which may occur. In one embodiment of the present invention, the upgoing signal and downgoing signal are time shifted and combined to maximize the resultant signal-to-­noise ratio.

摘要翻译： 海洋地震测量方法利用两个垂直间隔的海洋拖缆（18,20），每个海洋拖缆具有容纳在其中的多个地震检测器（22,24），以及一个位于或靠近一个地面（38）的地震能量源 水体（10），以产生传播到水下方的地层（26,28）的地震波（30,32,34），并反射回以在每个拖缆处检测。 地震波也从水/空气界面反射回流光。 在两个选定的垂直位移地震检测器（22,24）处检测到的地震波被组合以形成和信号，然后将其与缩放的差分信号的时间积分组合以形成合成信号，其保存上行或下行的地震波 。 在本发明的优选实施例中，对信号和积分信号进行滤波以在组合之前去除DC偏置和低频分量。 此外，差分信号的时间积分优选地通过平衡和中的信号中的功率来平衡其功率，由此自动调整可能发生的检测器间隔的变化。 在本发明的一个实施例中，上行信号和下行信号被时移并组合以最大化所得到的信噪比。