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    METHODE DE TRAITEMENT DE TRACES SISMIQUES REFLEXION ENREGISTREES POUR DES DEPORTS VARIABLES
    3.
    发明公开
    METHODE DE TRAITEMENT DE TRACES SISMIQUES REFLEXION ENREGISTREES POUR DES DEPORTS VARIABLES 失效
    方法加工，具有可变式偏移记录地震反射TRACKS

    公开(公告)号：EP0797780A1

    公开(公告)日：1997-10-01

    申请号：EP96933474.0

    申请日：1996-10-02

    申请人： ELF AQUITAINE PRODUCTION

    发明人： CANADAS, Guy ,  DUNAND, Jean-Pierre

    IPC分类号： G01V1

    CPC分类号： G01V1/362 ,  G01V1/32 ,  G01V2210/46 ,  G01V2210/52

    摘要： A method for processing reflection seismic traces recorded for variable offsets, wherein a parabolic or hyperbolic RADON transformation is applied to collections d(t,x) of normal moveout (NMO) common mid-point seismic traces so that each collection d(t,x) is converted into a diagram ν(τ,q) on which each seismic event of d(t,x) is focused on an energy concentration area. The event focused on each of the energy concentration areas of the diagram ν(τ,q) is then reconstructed in linear form in a diagram D(τ,x2) by stacking along a straight line scanning a window centred on the apparent point centre of the energy concentration area in question, and covering the whole of said area. The method is useful for geophysical processing and particularly for determining intercept (Ro) and gradient (G) quantities by amplitude versus offset analysis (AVO).

    METHODE D'ANALYSE ET DE TRAITEMENT DE DONNEES SISMIQUES REFLEXION
    4.
    发明公开
    METHODE D'ANALYSE ET DE TRAITEMENT DE DONNEES SISMIQUES REFLEXION 失效
    程序进行分析和处理地震反射数据

    公开(公告)号：EP0734536A1

    公开(公告)日：1996-10-02

    申请号：EP95935486.0

    申请日：1995-10-13

    申请人： ELF AQUITAINE PRODUCTION

    发明人： DE BAZELAIRE, Eric ,  DUNAND, Jean-Pierre

    IPC分类号： G01V1

    CPC分类号： G01V1/362 ,  G01V1/303 ,  G01V2210/52

    摘要： Method for analyzing and processing reflection seismic data for determining a fine field of hyperbolicity correction speeds. It is characterized in that, for all collections of dynamically corrected traces, the maximum values of positive and negative residues of the dynamic correction are determined, and a temporal analysis range is determined on either side of a time value To and of which the width is equal at the maximum to twice the absolute value of the maximum residue; a family of 2n+1 hyperbolas or parabolas of residual correction is constructed, each of them having the apex centred at the time value To and presenting, at the maximum offset value, a time value equal to one of the 2n+1 equidistant time values predetermined on the analysis range and including the value To and the extreme values of said analysis range; 2n+1 defined sets of static corrections are determined by the time deviations with respect to said time value To on the 2n+1 hyperbolas or parabolas of residual correction; for each collection of traces, there is applied successively at each of the traces and for each hyperbola or parabola the statistics associated to the offset of said trace; and the traces thus corrected statistically are summed up so as to obtain an assembly of 2n+1 traces sum characterizing a field of correction speeds. Applications particularly to the oil industry.