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    • 6. 发明公开
    • NODE POSITION CORRECTION IN PRESENCE OF TIME DISTORTIONS
    • 薇薇薇薇薇
    • EP3120168A2
    • 2017-01-25
    • EP15736035.5
    • 2015-03-13
    • CGG Services SA
    • NOSS, Tony
    • G01V1/38
    • G01V1/3835G01V1/3852
    • Seismic data recorded on an ocean bottom node (OBN) is used to determine observed direct arrival times at the OBN from a set of seismic source shots having a time span that is only a portion of an entire span time for a shot line (402). The observed direct arrival times for each shot in the set of seismic source shots are compared statistically with a plurality of predicted direct arrival times for each shot in the set of seismic source shots to derive a statistical measure of differences across all shots. Each predicted direct arrival time is associated with a unique proposed position of the OBN (404). The unique proposed position that minimizes the statistical measure of differences between the observed direct arrival times and the predicted direct arrival times is selected for each shot in the set of shots as a corrected OBN position (406).
    • 使用记录在海底节点(OBN)上的地震数据来确定OBN的观测到的直接到达时间,该时间跨度仅为射击线整个跨度时间的一部分。 在该组地震源射击中观察到的每次射击的直接到达时间与该组地震源射击中的每次射击的多个预测直接到达时间进行统计学比较,以得出所有射击之间的差异的统计测量。 每个预测的直接到达时间与OBN的独特建议位置相关联。 作为校正的OBN位置,在拍摄组中的每个拍摄中选择最小化观察到的直达到达时间和预测的直接到达时间之间的差异的统计度量的唯一提出的位置。
    • 10. 发明公开
    • System and method for underwater distance measurement
    • 系统和Verfahren zur Unterwasser-Abstandsmessung
    • EP2869092A3
    • 2015-09-30
    • EP14189724.9
    • 2014-10-21
    • PGS Geophysical AS
    • Ursin, TorbjørnMalling, MichaelDrange, Geir Andre Motzfeldt
    • G01V1/38G06T7/00
    • G06K9/6215G01V1/3835G06T7/62G06T7/80G06T2207/10016G06T2207/30252
    • At least some of the exemplary embodiments are a method. The method includes obtaining (1004), at an underwater imaging device, a stream of images of geophysical surveying equipment, wherein the geophysical surveying equipment includes a target pattern having a calibrated image size. The geophysical surveying equipment is tracked (1012) using the image stream and the target pattern. The method further includes capturing (1014) from the image stream, a single image of the images of the geophysical surveying equipment, wherein the single image comprises an image of the target pattern having an apparent size. Based on the calibrated image size and the apparent size, a distance between the underwater imaging device and the geophysical surveying equipment is determined (1018).
    • 示例性实施例中的至少一些是一种方法。 该方法包括在水下成像装置处获取(1004)地球物理测量设备的图像流,其中地球物理勘测设备包括具有校准图像尺寸的目标图案。 使用图像流和目标图案跟踪地球物理测量设备(1012)。 所述方法还包括从所述图像流捕获(1014)所述地球物理测量设备的图像的单个图像,其中所述单个图像包括具有表观尺寸的所述目标图案的图像。 基于校准图像尺寸和表观尺寸,确定了水下成像装置与地球物理测量设备之间的距离(1018)。