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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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q值提取中的窗口效应
Keywords: 品质因子q,衰减窗,吸收衰减,谱比法
Abstract:
？品质因子q是岩性分析和储层预测的重要属性。大部分的q值估算方法都需要开窗口提取地震子波谱,不同形状、宽度的窗口对地层衰减信息的影响程度不同。在不同地震子波谱和不同窗口的条件下,通过模型测试,分析了地层q值的估算误差。测试结果显示,在一般情况下,提取的谱比信息容易受到窗口形状、宽度的影响,由此估算的q值是不可信的。进一步的测试发现:在衰减窗口条件下,提取的谱比信息在中高频段满足准确的衰减关系,且该特征与窗口形状和宽度无关。据此估计的q值具有较高的稳定性。
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