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Method for bispectral picking of anelliptical NMO correction parameters
Method for bispectral picking of anelliptical NMO correction parameters
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机译:椭圆NMO校正参数的双谱选取方法
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摘要
Method of determining the velocity V and anellipticity η parameters for processing seismic traces in a common midpoint (CMP) gather comprising:—a preliminary step to define a plurality of nodes (dtn, τo), for each node (dtn, τo) defined in the preliminary step, the following steps:—for static NMO correction of traces in the CMP gather as a function of the values of the said parameters dtn and τo at the node considered, and calculation of the semblance function associated with the said NMO correction for the node considered; and—for each picked time to, a step including determination of the maximum semblance node (dtn (to), τo (to)),—and a final step to convert the dtn (to) and τo (to) parameters, so as to obtain the velocity to) and anellepticity η (to) laws.
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机译:确定用于处理公共中点(CMP)道中的地震道的速度V和椭圆率η参数的方法,该方法包括:-为每个节点定义多个节点(dtn,τ o Sub>)的初步步骤在预备步骤中定义的节点(dtn,τ o Sub>)包括以下步骤:-对于CMP集中的迹线的静态NMO校正,取决于所述参数dtn和τ o Sub>,并为所考虑的节点计算与所述NMO校正相关的似然函数;并且-对于每个选取的时间t o Sub>,包括确定最大相似节点(dtn(t o Sub>),τ o Sub>(t o Sub>)),最后一步是转换dtn(t o Sub>)和τ o Sub>(t o Sub >)参数,从而获得速度t o Sub>)和反感度η(t o Sub>)规律。
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