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道集品质对叠前avo/ava同时反演的影响

Keywords: 西部凹陷,多次波衰减,修饰性处理,叠前反演,储层描述与预测

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Abstract:

?用于叠前反演的地震道集必须具备高的质量。针对辽河西部凹陷兴隆台地区叠前地震资料特点,本文首先采用多次波去除、随机噪声压制和道集拉平等修饰性处理手段提高道集品质,使得地震道集的avo特征与合成记录的avo特征一致;与原始记录相比,从处理后的道集中提取的地震子波在0~42hz有效频段内比较稳定,目标区域反演剩余量减小了20%以上,反演所得的纵横波阻抗数据交会结果比较集中,而且适合岩性识别,能比较准确地确定目标储层范围,进而说明地震资料品质对叠前反演效果的重要性。

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