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基于Choi-Williams时频分布的裂缝性地层时频特征

Chuang YANG,Zhu-wen WANG,Min XIANG,Jing-hua LIU

Global Geology（2015）

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Abstract
为验证Choi-Williams能量分布时频分析方法的有效性,将其引入阵列声波测井信号处理之中.结果表明,它对于裂缝性地层具有较好的区分和识别能力,并且可以有效地抑制多频率成分信号的交叉性干扰,清晰地得到声波测井信号的时频分布性能及其特征.对于致密性地层来说,声波测井信号的各组分波均无明显的衰减.对于裂缝性地层来说,斯通利波能量会有较大幅度的衰减;破碎度更好,渗透性越好的裂缝对斯通利波的衰减影响更大;横波的衰减在渗透性更好的裂缝中更加明显.
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Key words
time frequency distribution,Choi-Williams energy distribution,fractured formation
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