| The gas reservoir response in PP- and PS-wave frequency sections |
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| 作者姓名： | 黄中玉 王于静 孙显义 王桂水 |
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| 作者单位： | [1]Nanjing Geophysical Prospecting Institute, SINOPEC, Nanjing 210014, China. [2]Petrochina Daging Oilfield, Daging 163712,China |
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| 基金项目： | Acknowledgements This work is supported by the collaboration program between SIN0PEC Nanjing Geophysical Prospecting Institute and PetroChina Daqing, Ltd. and is published with the approval of all project partners. We also thank CNPC-PetroChina Daqing Ltd for the permission to issue the data. |
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| 摘 要： | Spectral decomposition using the method of Matching Pursuit Decomposition （MPD） for PP- and PS-wave data has higher resolution and higher consistency over the entire time-frequency plane. The MPD algorithm avoids the problems of inaccurate analytic time point and the time window size choice that may occur during a Fourier transform. The PP-wave attenuation is greater than the PS-wave attenuation while propagating through gas reservoirs. There are some stronger amplitude low-frequency shadows on the PP-wave single frequency sections beneath gas reservoirs which are not seen on corresponding PS- wave single frequency sections. Therefore, hydrocarbons are predicted from comparing the behavior on both frequency sections. The time-frequency analysis for multi-component data is decomposed by MPD for data from northeast China containing rich gas reservoirs. The gas response character is analyzed on different wave mode single frequency sections. We describe the MPD algorithm, compare it to other spectral decomposition methods, and show some examples of detecting low-frequency shadows beneath gas reservoirs.
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| 关 键 词： | 气藏 PP波频段 PS波频段 响应 谱分解 小波分析 |
| 收稿时间： | 31 October 2006 |
| 修稿时间： | 2006-10-312006-11-13 |
The gas reservoir response in PP- and PS-wave frequency sections |
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| Zhongyu Huang,Yujing Wang,Xianyi Sun,Guishui Wang.The gas reservoir response in PP- and PS-wave frequency sections[J].Applied Geophysics,2007,4(1):51-57. |
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| Authors: | Zhongyu Huang Yujing Wang Xianyi Sun Guishui Wang |
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| Institution: | (1) Nanjing Geophysical Prospecting Institute, SINOPEC, Nanjing, 210014, China;(2) Petrochina Daging Oilfield, Daging, 163712, Chinga |
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| Abstract: | Spectral decomposition using the method of Matching Pursuit Decomposition (MPD) for PP- and PS-wave data has higher resolution and higher consistency over the entire time-frequency plane. The MPD algorithm avoids the problems of inaccurate analytic time point and the time window size choice that may occur during a Fourier transform. The PP-wave attenuation is greater than the PS-wave attenuation while propagating through gas reservoirs. There are some stronger amplitude low-frequency shadows on the PP-wave single frequency sections beneath gas reservoirs which are not seen on corresponding PS-wave single frequency sections. Therefore, hydrocarbons are predicted from comparing the behavior on both frequency sections. The time-frequency analysis for multi-component data is decomposed by MPD for data from northeast China containing rich gas reservoirs. The gas response character is analyzed on different wave mode single frequency sections. We describe the MPD algorithm, compare it to other spectral decomposition methods, and show some examples of detecting low-frequency shadows beneath gas reservoirs. |
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| Keywords: | Gas layer wavelet analysis matching pursuit decomposition spectral decomoosition and converted waves |
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