多参数叠加是近年来发展起来的一类不依赖于速度模型的数据域驱动的地震成像方法,该方法最具代表性的就是共反射面元(Common Reflect Surface,CRS)叠加.在二维非均匀介质中,利用地下某点绕射波的运动学响应,推导出一种新的多参数叠加算子,并借助与CRS叠加相类似的数据域参数搜索优化策略,最终得到反映地下复杂构造信息的零偏移距时间剖面.运用Sigsbee 2a模型试算,结果证明了该方法的有效性.%Multi-parameter stacking developed rapidly in recent years is a data-driven seismic imaging method independent of velocity model.One of the most typical techniques is Common Reflection Surface(CRS) Stacking.Using the primary kinematic response of a diffractor,we have deducted a new Multi-parameter stacking formulation in a 2D inhomogeneous medium.Combined with a parameter searching optimization strategy which is similar to CRS in data domain,we could obtain zero offset time section which represents complex geological conformation.Model tests have shown that the new operator is efficient and reliable.
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