公开(公告)号：US20030193837A1

公开(公告)日：2003-10-16

申请号：US10376076

申请日：2003-02-27

Applicant: WESTERNGECO L.L.C., A Delaware Limited Liability Company

Inventor： Bjorn Eino Rommel

IPC: G01V001/00

CPC classification number: G01V1/003

Abstract: A method of evaluating a seismic survey to be carried out at a particular survey location comprises choosing an initial seismic surveying arrangement. One or more parameters of AVO (amplitude versus offset) uncertainty are then determined from the seismic surveying arrangement using a model of the earth's interior at the survey location. If the parameter(s) of AVO uncertainty are not acceptable the seismic surveying arrangement is changed, and the AVO uncertainty parameter(s) re-determined for the new acquisition geometry. The determination of the AVO uncertainty parameter(s) may make use of prior information such as the noise covariance and/or model covariance. This enables the AVO uncertainty parameters to be estimated independent of any seismic data.

Abstract translation: 评估在特定勘测位置进行的地震勘测的方法包括选择初始地震测量装置。 然后使用地面测量位置的地面模型从地震测量装置确定一个或多个AVO参数（幅度对偏移）不确定度。 如果AVO不确定度的参数不可接受，则改变地震测量装置，并为新的采集几何重新确定AVO不确定度参数。 AVO不确定性参数的确定可以利用诸如噪声协方差和/或模型协方差之类的先前信息。 这使得能够独立于任何地震数据来估计AVO不确定性参数。

公开(公告)号：US20040230389A1

公开(公告)日：2004-11-18

申请号：US10820088

申请日：2004-04-07

Applicant: WesternGeco L.L.C., a Delaware Limited Liability Company

Inventor： Frank Adler ,  Everhard Muyzert

IPC: G01R013/00

CPC classification number: G01V1/30

Abstract: A method of determining at least one parameter of a waveguide (3) from wavefield data acquired from wave propagation in the waveguide comprises obtaining first and second dispersion curves (9a, 9b, 9c) in the frequency domain from the wavefield data. A frequency interval between the first dispersion curve and the second dispersion curve is found, and this is used in the determination of at least one parameter of the waveguide. The frequency separation nullf(V) between the first and second dispersion curves may be found at a particular value of the phase velocity V, and the thickness h of the waveguide can be found using: 1 null null null null f null ( V ) = c 1 2 null h null 1 - c 1 2 V 2 Here, c1 is the velocity of wave propagation in the waveguide. This may be found from the asymptotic velocity values of the dispersion curves.

公开(公告)号：US20030210609A1

公开(公告)日：2003-11-13

申请号：US10403135

申请日：2003-03-31

Applicant: WESTERNGECO L.L.C. a Delaware Limited Liability Company

Inventor： Benjamin Peter Jeffryes

IPC: G01V001/00

CPC classification number: G01V1/005

Abstract: A method of seismic surveying comprising the steps of actuating the or each vibrator in a first vibrator group at time T0, and subsequently actuating the or each vibrator in a second vibrator group at time T1 that satisfies T0

Abstract translation: 一种地震勘测方法，包括以下步骤：在时间T0激活第一振动器组中的每个振动器，以及随后在满足T0