| 转换波二极化校正及在陆上气云区的应用(英文) |
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| 引用本文： | 张四海,李向阳,戴恒昌.转换波二极化校正及在陆上气云区的应用(英文)[J].应用地球物理,2011,8(3):171-180. |
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| 作者姓名： | 张四海 李向阳 戴恒昌 |
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| 作者单位： | 中国石油大学(北京)油气资源与探测国家重点实验室;中国石油大学(北京)CNPC物探重点实验室;Edinburgh Anisotropy Project;British Geophysical Survey; |
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| 基金项目： | supported by the National Natural Science Foundation of China (No. 41074080); the Important National Science & Technology Specific Projects (No. 2011ZX05019-008) |
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| 摘 要： | 转换波技术是解决气云区成像问题的有效手段,而二极化现象则是制约转换波构造成像精度提高的一个重要因素。解决该问题的一个有效办法是二极化校正:将转换波速度分解为基本速度和速度扰动,分两步对转换波地震数据进行叠加速度分析和叠前时间偏移速度分析。柴达木盆地三湖地区天然气资源丰富,气云广泛发育,通过对三湖地区二维三分量地震数据的研究分析,发现该地区转换波二极化现象明显,对转换波的准确成像有较大影响。通过对转换波二极化校正方法的应用,不论是在叠加成像,还是叠前偏移成像都取得了较好的效果,提高了气云区转换波构造成像的精度。二极化校正对解决气云区转换波剩余静校正有重要促进作用,二极化校正与转换波剩余静校正的结合是陆上气云区转换波高精度成像流程中必不可少的环节。
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| 关 键 词： | 二极化 转换波 气云 基本速度 扰动速度 |
| 收稿时间： | 1 January 2004 |
Converted-wave diodic moveout and application in the land gas cloud area |
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| Si-Hai Zhang,Xiang-Yang Li,Heng-Chang Dai.Converted-wave diodic moveout and application in the land gas cloud area[J].Applied Geophysics,2011,8(3):171-180. |
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| Authors: | Si-Hai Zhang Xiang-Yang Li Heng-Chang Dai |
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| Institution: | Zhang Si-Hai 1,2,Li Xiang-Yang 2,3,and Dai Heng-Chang 31.State Key Laboratory of Petroleum Resources and Prospecting,China University of Petroleum,Beijing 102249 China.2.CNPC Key Laboratory of Geophysical Prospecting,Beijing 102249 China.3.Edinburgh Anisotropy Project,British Geophysical Survey,Edinburgh EH9 3LA,U.K. |
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| Abstract: | PS converted-waves (C-waves) have been commonly used to image through gas clouds but the C-wave imaging may also be degraded by the diodic effect introduced by the gas cloud.It may be compensated for using a velocity perturbation method which decouples the diodic moveout into two parts:the base velocity and the velocity perturbation.Gas clouds are widely distributed in the Sanhu area in the Qaidam basin of northwest China which is rich in natural gas.A land 2D3C seismic dataset is analyzed from the Sanhu ar... |
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| Keywords: | Diodic converted wave gas cloud base velocity perturbation |
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