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OALib Journal期刊
ISSN: 2333-9721
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利用基于双平方根方程的局部谐波分解法提取角度道集
Keywords: 角度道集,双平方根方程,谐波分解,高效滤波器
Abstract:
？本文在基于单平方根方程的局部谐波分解法提取角度道集方法基础上提出了一种利用双平方根方程的局部谐波分解法提取角度道集的新方法。文中推导了相关的理论计算公式。新方法使用高效滤波器直接从双平方根方程延拓后的叠前波场中求出反射系数的谐波分解,并由此获得角度道集。理论模型和实际资料的试算结果表明了方法的正确性和有效性。同基于单平方根方程的局部谐波分解方法相比,对于常规的海上地震资料,该方法具有较高的计算效率,而且成像质量相当。由于在实现叠前波场延拓时采用了炮检距域-有限差分延拓方法,使该方法增加了差分项,能适应剧烈的横向速度变化。
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