海洋天然气水合物勘探地震处理的最小平方反滤波设计及其应用
The principle of least-squares-inverse filtering and its application
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摘要: 地震勘探的BSR识别技术是发现海洋天然气水合物的最经济、快捷、方便、有效的方法.在地震处理识别上,对子波的精确处理是水合物地震资料处理中最关键的一个环节,采用最小平方误差准则,即利用实际输出与期望输出的误差平方和为最小的条件,来确定反滤波因子,因此又称为最小平方子波整形.在地震处理程序中引入三种期望输出,即俞氏子波、雷克子波、Buttworth子波,对子波零相位化有较好的效果.根据上面的原理,我们开发了一套最小平方反滤波地震处理软件,对天然气水合物地震勘探资料进行试处理的结果表明,该软件在提高分辨率的同时保持了较高的信噪比.
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关键词:
- 反褶积 /
- 最小平方反滤波 /
- 俞氏子波 /
- 雷克子波 /
- Buttworth子波
Abstract: In order to improve the resolution of seismic profiles in vertical,the aim of deconvolution is to suppress the ground filtering in exploration.The leas-tsquares error is adopted,that is,considering sum of all anticipant output error as the least condition,to decide the inverse filtering factor.Three kinds of anticipation output is introduced:YUShi wavelet,Ricker wavelet,Buttworth wavelet.These wavelets help to improve the effect of zero-phase.According to the principle above,a software for least-squares-inverse filtering is developed.The results indicate this method not only improves the resolution but also maintains a relatively high ratio of signal-to-noise,especially in the detection of gas hydrate.-
Key words:
- deconvolution /
- least-square-sinverse filtering /
- YuShi wavelet /
- Ricker wavelet /
- Buttworth wavelet
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KVENVOLDEN K A.Gas hydrate-geological perspective and global change[J].Rev Geophys,1993,31:173-187. 杨胜雄,张光学,张明海洋天然气水合物综合勘测技术[A].'99海洋高新技术发展研讨会论文集[C].北京:海洋出版社,2000.507-512. MACKAY M E,JARRARD R D,WESTBROOK G K,et al. Origin of bottom-simulating reflectors:geophysical evidence from the Cascadia accretinary prism[J].Geology,1994,22:459-462. SINGH S C,MINSHULL T A,SPENCE G D. Velocity structure of a gas hydrate reflector[J].Science,1993,260:204-207. LEE M W,HUTCHINSON D R,AGENA W F,et al. Seismic character of gas hydrates on the southeastern U S continental margin[J].Mar Geophys Res,1994,16:163-184. CARCIONE J M,TINIVELLA U. Bottom-simulating reflectors:seismic velocities and AVO effects [J].Geophysics,2000,65(1):54-67. HUNTER J M,MILLER R D,DOLL W E,et al. Feasibility of high resolution P-and S-wave seismic reflection to detectmethane hydrate[J].Soc Expl Geophys Expanded Abstracts,1999. 俞寿朋.高分辨率地震勘探[M].北京:石油工业出版社,1993.125. 熊翥.地震数据数字处理应用技术[M].北京:石油工业出版社,1993.187. 牟永光.地震勘探资料数字处理方法[M].北京:石油工业出版社,1981.85. 程乾生.信号数字处理的数学原理(第2版)[M] 北京:石油工业出版社,1993.221. 张光学,陈邦彦,杨胜雄,等.海洋天然气水合物地震学研究[A].天然气水合物调查动态、勘探方法和成果研讨会[C].2001. -
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