| 三种阵列声波测井数据频散分析方法的应用与比较 |
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| 引用本文： | 曹正良,王克协,谢荣华,马在田.三种阵列声波测井数据频散分析方法的应用与比较[J].地球物理学报,2005,48(6):1449-1459. |
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| 作者姓名： | 曹正良 王克协 谢荣华 马在田 |
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| 作者单位： | 1.杭州应用声学研究所 海洋声学国家级重点实验室，杭州 310012 2 吉林大学物理学院声学系，长春130023 3 大庆油田测试技术服务公司，大庆163153 4 同济大学海洋与地球科学学院，上海 200092 |
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| 基金项目： | 中国博士后科学基金项目(2004036104)资助 |
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| 摘 要： | 针对正交偶极声波测井检测地层各向异性和确定构造应力中频散分析的必要性，本文利用合成和实测阵列声波测井数据分析和比较了三种频散分析方法：Prony方法、同态处理方法和谱域加权相似法. 这三种频率域处理方法提取得到了合理的、一致的慢度结果. 谱域加权相似法只能用于每一频率下单一波模式的慢度估计；同态处理方法还可以同时估计单一波模式的衰减、幅度和初相位；利用SVD_TLS算法确定波模式的阶数后，Prony方法可以有效地估计每一频率下多个模式的上述参数. 另外，通过谱域加权相似法对正交偶极声波测井阵列数据进行频散分析，观察到了弯曲波频散曲线的交叉现象，从而确定出了对应地层所受最大水平主应力的方向.
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| 关 键 词： | 频散分析 Prony方法 同态处理方法 谱域加权相似法 |
| 文章编号： | 0001-5733（2005）06-1449-11 |
| 收稿时间： | 2004-11-03 |
| 修稿时间： | 2004-11-032005-08-12 |
A comparative study on application of three dispersion analysis to array sonic logs |
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| CAO Zheng-Liang,WANG Ke-Xie,XIE Rong-Hua,MA Zai-Tian.A comparative study on application of three dispersion analysis to array sonic logs[J].Chinese Journal of Geophysics,2005,48(6):1449-1459. |
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| Authors: | CAO Zheng-Liang WANG Ke-Xie XIE Rong-Hua MA Zai-Tian |
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| Institution: | 1.State Key Lab. of Oceanic Acoustics, Hangzhou Applied Acoustics Research Institute, Hangzhou 310012, China 2 College of Physics, Jilin University, Changchun 130023, China 3 Test and Technology Services Corporation of Daqing, Daqing 163153, China 4 Schoo |
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| Abstract: | As a dispersion analysis is essential to the estimation of anisotropy and in situ stress of formation by cross-dipole logs,we have carried out dispersion analysis on synthetic and field array sonic logs with three methods,namely,the Prony's method,homomorphic processing,and weighted spectral semblance.These frequency domain processing methods yield reasonable and consistent slowness estimations.Weighted spectral semblance is only able to give the slowness estimation for a single mode at each frequency.While homomorphic processing can also be used to calculate attenuation,amplitude and phase of one mode simultaneously.By introducing the SVD-TLS algorithm to determine the order of the wave modes,the Prony's method can be utilized to effectively estimate all the above parameters for more than one mode at all frequencies.In this study,we have also observed the crossover of flexural wave dispersion curves calculated by the weighted spectral semblance processing of the cross-dipole logs and determined subsequently the direction of the maximum horizontal formation stress of the surrounding formation. |
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| Keywords: | Dispersion analysis Prony's method Homomorphic processing Weighted spectral semblance |
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