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Prestack reverse-time depth migration of arbitrarily wide-angle wave equations

机译:任意广角波动方程的叠前逆时深度偏移

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摘要

Based on arbitrarily wide-angle wave equations, a reverse-time propagation scheme is developed by substituting the partial derivatives of depth and time with central differences. The partial derivative of horizontal direction is replaced with high order difference. The imaging condition is computed by solving the eikonal equations. On the basis of above techniques, a prestack reverse-time depth migration algorithm is developed. The processing exam-ples of synthetic data show that the method can remove unwanted internal reflections and decrease the migration noise. The method also has the advantage of fidelity and is appficable of dip angle reflector imaging.
机译:基于任意广角波方程,通过将深度和时间的偏导数替换为中心差来开发逆时传播方案。水平方向的偏导数被高阶差代替。通过求解本征方程来计算成像条件。在上述技术的基础上,提出了一种叠前逆时深度偏移算法。合成数据的处理示例表明,该方法可以消除不必要的内部反射并减少迁移噪声。该方法还具有保真度的优点,并且适用于倾角反射器成像。

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