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通常,AVO分析需要平的道集,但很多时候,使用解析曲线法无法达到这个目标。本文论述了一种非物理性的简单道集拉平方法,即基于沿每个t时进行同相轴追踪(FLATN)方法。通过与Hinkley等人的动态道集拉平办法(DGF)及Gulunay的外部叠加道排齐CMP内道集的对比和改进,使较为完善的FLATN方法应用在多种类型的数据上,包括叠前时间偏移和叠前深度偏移道集,获得了一致性好的平的道集,特别是对主测线和联络测线方向的正常时差校正曲线的外部处理获取了满意的处理效果。该方法对同类问题具有一定的推广价值。
Often, AVO analysis requires flat gathers but in many cases this can not be done using analytical curves. This paper discusses a nonphysical simple method of leveling gathers, which is based on the FLATN method at every t time. The improved FLATN method is applied to many types of data, including prestack time, by comparing and improving with Hinkley et al.’s dynamic gatheralering method (DGF) and Gulunay’s external cascade CMP gathers Offset and prestack depth offset gathers, a well-consistent flat gathers are obtained, especially for the external processing of the normal time-lag correction curves of the main line and the contact line. This method has certain promotion value for similar problems.