| 地球物理技术在天然气水合物预测中的应用 |
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| 引用本文： | 刘彦君,刘喜武,刘大锰,王燕津,赵迎新.地球物理技术在天然气水合物预测中的应用[J].应用地球物理,2008,5(1):67-73. |
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| 作者姓名： | 刘彦君 刘喜武 刘大锰 王燕津 赵迎新 |
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| 作者单位： | 中国地质大学，中国海洋大学，中国地质大学，吉林油田，吉林油田 北京学院路 100083，山东 青岛 266100，北京学院路 100083，吉林 松原 138000，吉林 松原 138000 |
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| 基金项目： | National Gas Hydrates Integral Appraisal Project (GZH200200203-05). |
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| 摘 要： | Based on the sensitivity of geophysical response to gas hydrates contained in sediments, we studied the prediction of gas hydrates with seismic techniques, including seismic attributes analysis, AVO, inverted velocity field construction for dipping formations, and pseudo-well constrained impedance inversion. We used an optimal integration of geophysical techniques results in a set of reliable and effective workflows to predict gas hydrates. The results show that the integrated analysis of the combination of reflectivity amplitude, instantaneous phase, interval velocity, relative impedance, absolute impedance, and AVO intercept is a valid combination of techniques for identifying the BSR （Bottom Simulated Reflector） from the lower boundary of the gas hydrates. Integration of seismic sections, relative and absolute impedance sections, and interval velocity sections can improve the validity of gas hydrates determination. The combination of instantaneous frequency, energy half attenuation time, interval velocity, AVO intercept, AVO product, and AVO fluid factor accurately locates the escaped gas beneath the BSR. With these conclusions, the combined techniques have been used to successfully predict the gas hydrates in the Dongsha Sea area.
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| 关 键 词： | 地球物理学 气水化物 测试方法 地震 |
| 修稿时间： | 2007年5月14日 |
Applications of seismic techniques to gas hydrates prediction |
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| Yanjun?Liu,Xiwu?Liu,Dameng?Liu,Yanjin?Wang,Yingxin?Zhao.Applications of seismic techniques to gas hydrates prediction[J].Applied Geophysics,2008,5(1):67-73. |
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| Authors: | Yanjun Liu Xiwu Liu Dameng Liu Yanjin Wang Yingxin Zhao |
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| Abstract: | Based on the sensitivity of geophysical response to gas hydrates contained in sediments, we studied the prediction of gas hydrates with seismic techniques, including seismic attributes analysis, AVO, inverted velocity field construction for dipping formations, and pseudo-well constrained impedance inversion. We used an optimal integration of geophysical techniques results in a set of reliable and effective workflows to predict gas hydrates. The results show that the integrated analysis of the combination of reflectivity amplitude, instantaneous phase, interval velocity, relative impedance, absolute impedance, and AVO intercept is a valid combination of techniques for identifying the BSR (Bottom Simulated Reflector) from the lower boundary of the gas hydrates. Integration of seismic sections, relative and absolute impedance sections, and interval velocity sections can improve the validity of gas hydrates determination. The combination of instantaneous frequency, energy half attenuation time, interval velocity, AVO intercept, AVO product, and AVO fluid factor accurately locates the escaped gas beneath the BSR. With these conclusions, the combined techniques have been used to successfully predict the gas hydrates in the Dongsha Sea area. |
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| Keywords: | Geophysical data special processing gas hydrates BSR prediction |
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