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418 条记录 (耗时 0.023 秒)

    Method and system of controlling towing speed of a sensor streamer
    52.
    发明公开
    Method and system of controlling towing speed of a sensor streamer 审中-公开
    传感器流体系统（Verfahren und System zur Steuerung der Schleppgeschwindigkeit）

    公开(公告)号：EP2685289A1

    公开(公告)日：2014-01-15

    申请号：EP13173759.5

    申请日：2013-06-26

    申请人： PGS Geophysical AS

    发明人： Turnbull, Neil H R

    IPC分类号： G01V1/38

    摘要： Controlling towing speed of a sensor streamer. At least some of the of the embodiments are methods including: towing a sensor streamer through water at a towing speed (402); releasing interrogating energy within the water (404); recording energy received by the sensor streamer to create recorded energy (406); determining a value indicative of noise within the recorded energy (408); and changing the towing speed in real-time responsive to the value indicative of noise within the recorded energy (416).

    摘要翻译： 控制传感器拖缆的牵引速度。 实施例中的至少一些是方法，包括：以牵引速度（402）将传感器拖缆牵引通过水; 释放水中的询问能量（404）; 记录由传感器流光镜接收的能量以产生记录的能量（406）; 确定指示记录能量内的噪声的值（408）; 以及响应于指示所记录的能量内的噪声的值，实时地改变牵引速度（416）。

    Methods and Systems for Reconstruction of Low Frequency Particle Velocity Wavefields and Deghosting of Seismic Streamer Data
    53.
    发明公开
    Methods and Systems for Reconstruction of Low Frequency Particle Velocity Wavefields and Deghosting of Seismic Streamer Data 审中-公开
    方法和系统重建地震Streamerdaten低Teilchengeschwindigkeitswellenfelder和去重影

    公开(公告)号：EP2685288A2

    公开(公告)日：2014-01-15

    申请号：EP13175622.3

    申请日：2013-07-08

    申请人： PGS Geophysical AS

    发明人： Orji, Okwudili ,  Hegna, Stian ,  Söllner, Walter

    IPC分类号： G01V1/36

    CPC分类号： G01V1/364 ,  G01V2210/56

    摘要： Computational methods and systems for deghosting marine seismic streamer data are described. In particular, an exploration-seismology vessel tows a number of streamers that form a data acquisition surface located beneath a free surface. The methods computationally deghost or substantially remove receiver ghost signals from seismic data recorded by steamer receivers. The deghosting methods include low frequency compensation to recover vertical velocity wavefield information that is typically lost due to a low signal-to-noise ratio over a low frequency range independent of the free surface conditions or the shape of the data acquisition surface.

    摘要翻译： 用于海洋地震拖缆数据消重影的计算方法和系统进行了描述。 特别地，为了勘探地震船牵引的一些拖缆的确实形成位于自由表面下的数据采集表面。 的方法计算去重影或基本上由蒸锅接收器记录的地震数据除去接收器虚信号。 所述消重影的方法包括低频补偿以恢复垂直速度波场信息并通常在由于低频范围独立的自由表面条件或地面数据获取的形状输给低信噪比。

    Surface-Related Multiple Elimination for Depth-Varying Streamer
    54.
    发明公开
    Surface-Related Multiple Elimination for Depth-Varying Streamer 审中-公开
    OberflächenbezogeneMehrfacheliminierungfürStreamer mit variablen Tiefen

    公开(公告)号：EP2674788A2

    公开(公告)日：2013-12-18

    申请号：EP13170268.0

    申请日：2013-06-03

    申请人： PGS Geophysical AS

    发明人： Borselen, Roald Gunnar van

    IPC分类号： G01V1/28 ,  G01V1/38

    CPC分类号： G01V1/28 ,  G01V1/38 ,  G01V2210/56

    摘要： Techniques are described for predicting surface-related multiples from measurements performed at varying depths. One or more operations, such as wavefield decompositions and/or extrapolations, may be performed on scattered wavefield data obtained by underwater sensors at different underwater depths to determine one or more surface-related multiple wavefield contributions at a selected depth or at the different underwater depths where the scattered wavefield data is collected from measurements.

    摘要翻译： 描述了用于从在不同深度执行的测量来预测表面相关倍数的技术。 可以对在不同水深深度处的水下传感器获得的散射波场数据执行诸如波场分解和/或外推的一个或多个操作，以确定在选定的深度或不同的水下深度处的一个或多个与表面相关的多波场贡献 其中从测量中收集散射波场数据。

    Methods and Apparatus for Automated Noise Removal from Seismic Data
    55.
    发明公开
    Methods and Apparatus for Automated Noise Removal from Seismic Data 审中-公开
    地震活动中的Verfahren und Vorrichtung zur automatisierten Rauschbeseitigung

    公开(公告)号：EP2634602A2

    公开(公告)日：2013-09-04

    申请号：EP13157025.1

    申请日：2013-02-27

    申请人： PGS Geophysical AS

    发明人： Brittan, John ,  Lecocq, Paul ,  Wrench, Andrew

    IPC分类号： G01V1/36

    CPC分类号： G01V1/36 ,  G01V2210/32 ,  G01V2210/3246 ,  G01V2210/3248 ,  G01V2210/56

    摘要： Disclosed are methods and apparatus for noise removal from seismic data. In one embodiment, a seismic data set comprising a plurality of traces is received, and noise metrics for the seismic data set are computed using a set of time and depth windows. The seismic data set is scanned to determine a first set of groups. Each group in the first set comprises at least a first minimum number of neighboring traces for which at least one of the noise metrics is outside a predefined specification. Noise attenuation is applied to the traces in the first set of groups. Other embodiments, aspects, and features are also disclosed.

    摘要翻译： 公开了用于从地震数据中去除噪声的方法和装置。 在一个实施例中，接收包括多个迹线的地震数据集，并且使用一组时间和深度窗口来计算地震数据集的噪声度量。 扫描地震数据集以确定第一组组。 第一组中的每个组包括至少一个噪声度量超出预定义规范的至少第一最小数量的相邻迹线。 噪声衰减应用于第一组组中的迹线。 还公开了其它实施例，方面和特征。

    Methods and systems for correction of streamer-depth bias in marine seismic surveys
    56.
    发明公开
    Methods and systems for correction of streamer-depth bias in marine seismic surveys 审中-公开
    Verfahren und System zur Korrektur der Streamer-Tiefen-Vorspannung bei Seebebenmessungen

    公开(公告)号：EP2626726A2

    公开(公告)日：2013-08-14

    申请号：EP13154694.7

    申请日：2013-02-08

    申请人： PGS Geophysical AS

    发明人： Orji, Okwudili ,  Söllner, Walter

    IPC分类号： G01V1/36

    CPC分类号： G01V1/362 ,  G01V1/3835 ,  G01V2210/56

    摘要： Computational systems and methods to be carried out by the computational systems for determining streamer-depth bias during exploration-seismology experiments are disclosed. An exploration-seismology vessel tows a number of streamers that form a smoothly varying data acquisition surface located beneath a fluid surface. In one aspect of this disclosure, the method determines a set of image points that represent a profile of the fluid surface above each streamer. The image points are determined based on pressure and velocity wavefields measured at dual sensors of the streamer. The method then determines an elevation parameter of the image points that minimizes DC offset in a spectral domain of the image points. The elevation parameter corresponds to the streamer-depth bias and can be used to correct for the streamer-depth bias in subsequent calculations of a fluid-surface profile.

    摘要翻译： 公开了用于在探测地震学实验期间确定流光 - 深度偏差的计算系统进行的计算系统和方法。 勘探地震学船只牵引多个飘带，其形成位于流体表面下方的平滑变化的数据采集表面。 在本公开的一个方面，该方法确定表示每个拖缆上方的流体表面的轮廓的一组图像点。 基于在拖缆的双传感器测量的压力和速度波场来确定图像点。 该方法然后确定最小化图像点的谱域中的DC偏移的图像点的高程参数。 高程参数对应于拖缆深度偏差，并可用于校正随后的流体表面轮廓计算中的拖缆深度偏差。

    Direct velocity seismic sensing
    58.
    发明公开
    Direct velocity seismic sensing 审中-公开
    直接的地震Geschwindigkeitsfühlung

    公开(公告)号：EP2339381A3

    公开(公告)日：2013-06-19

    申请号：EP10195363.6

    申请日：2010-12-16

    申请人： PGS Geophysical AS

    发明人： Fernihough, Robert A. P.

    IPC分类号： G01V1/18

    CPC分类号： G01V1/181

    摘要： A disclosed direct velocity seismic sensor includes a housing, a proof mass suspended in the housing by a resilient component, and a motion dampener that damps oscillation of the proof mass to a degree that displacement of the proof mass relative to the housing is substantially linearly proportional to a rate of change of seismic displacements of the housing over a frequency range of interest. A described method for constructing a seismic sensor includes using a calculated resonant frequency to determine a damping factor that causes the displacement of the proof mass to be substantially proportional to the rate of change of seismic displacement of the housing. One illustrative disclosed system includes an optical velocity sensor and a detector where a light beam produced by the velocity sensor and a reference beam interfere at the detector, and the detector produces a signal indicative of a velocity experienced by the velocity sensor.