垂直地震剖面GRT偏移

GRT migration of VSP data

垂直地震剖面偏移对 VSP 方法的实际应用有着重要的意义。本文根据 Radon 变换的数学原理,从标量波动方程出发,利用格林函数解的几何光学近似推导了垂直地震剖面 GRT(Gen-eralized Radon transform)偏移公式。文中,用 GRT 偏移方法对 VSP 正演模型数据和实际资料的处理结果表明,该方法对于复杂地质构造的成像具有适应性强、灵活性大、精度高等优点。

VSP migration is of great significance to good VSP application.The formu- la of generalized Radon transform(GRT)migration of VSP data is derived from Radon transform principle,scalar wave equation and the geometric optical property of Green's function solution. GRT migration results of modeled VSP data and real VSP data show that GRT migration is high adaptable and accurate to the image of complicated geo- logical structure.