论文部分内容阅读
目前,阵列声波测井信号处理大多在时间域或频率域中进行。但是,单纯的时间域或频率域方法有很大的局限性。为了打破这些局限性,笔者将分数阶Fourier变换方法用于阵列声波测井信号的分析之中,研究了不同性质储集层中信号幅度随分数阶Fourier变换阶数变化的规律。实验结果表明:在干层,幅度呈“1”型分布;在水层,幅度呈“Y”型分布,“Y”的两支开口较小,在阶数大于0.3的区域中,幅度较大;在油层,幅度呈“Y”型分布,“Y”的两支开口较大,在阶数大于0.6的区域中,幅度较大。因此,分数阶Fourier变换在提取阵列声波测井蕴含的储集层流体性质信息方面具有很好的前景。
At present, the array acoustic logging signal processing mostly in the time domain or frequency domain. However, simple time domain or frequency domain methods have great limitations. In order to break these limitations, the author uses the fractional Fourier transform method in the analysis of array acoustic logging signals, and studies the law of signal amplitude with fractional Fourier transform order in different reservoir types. The experimental results show that the distribution of amplitude is “1” in the dry layer, “Y” distribution in the water layer, and smaller in the “Y” In the area, the amplitude is larger. In the oil layer, the amplitude is “Y” -shaped and the two openings of “Y” are larger. In the area of order greater than 0.6, the amplitude is larger. Therefore, Fractional Fourier Transform has a good prospect in extracting reservoir fluid properties information contained in array acoustic logging.