| 三维转换波叠前方位各向异性校正技术 |
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| 引用本文： | 张丽艳,王建民,李昂,陈志德.三维转换波叠前方位各向异性校正技术[J].石油地球物理勘探,2011(5). |
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| 作者姓名： | 张丽艳 王建民 李昂 陈志德 |
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| 作者单位： | 大庆油田有限责任公司勘探开发研究院; |
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| 基金项目： | 国家重点基础研究发展“973”计划项目(2009CB219307)资助 |
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| 摘 要： | 转换波成像与常规纵波成像不同的是转换波受方位各向异性的影响更为严重,相同反射点的快、慢波时差可达到40ms,严重影响转换波成像质量和分辨率。本文以横波分裂理论为基础,提出了一种叠前方位各向异性校正技术。该技术是基于共检波点叠加的层剥离转换波方位各向异性分析方法,并在叠前共检波点道集上进行方位各向异性校正。通过该技术在喇嘛甸工区的应用,得出T2层方位各向异性的主方位在67°～84°之间,快慢波时延在10～40ms之间。经过方位各向异性校正后,径向分量能量增强,切向分量能量减弱,提高了转换波成像质量和垂向分辨率。
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| 关 键 词： | 方位各向异性 叠前校正 横波分裂 快慢波时延 |
3D converted wave prestack azimuth anisotropy correction |
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| Zhang Li-yan,Wang Jian-min,Li Ang , Chen Zhi-de..Exploration , Exploitation Research Institute,Daqing Oilfield LTD,CNPC,Daqing,Heilongjiang ,China.3D converted wave prestack azimuth anisotropy correction[J].Oil Geophysical Prospecting,2011(5). |
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| Authors: | Zhang Li-yan Wang Jian-min Li Ang Chen Zhi-deExploration Exploitation Research Institute Daqing Oilfield LTD CNPC Daqing Heilongjiang China |
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| Affiliation: | Zhang Li-yan1,Wang Jian-min1,Li Ang1 and Chen Zhi-de1.1.Exploration and Exploitation Research Institute,Daqing Oilfield LTD,CNPC,Daqing,Heilongjiang 163712,China |
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| Abstract: | Converted wave imaging is affected much more seriously by the azimuth anisotropy than conventional P-wave imaging.In the same reflection point,the time-delay between fast wave and slow wave can be up to 40 ms.So the quality and resolution of converted wave imaging will be seriously damaged.According to the shear wave splitting theory,we propose a method of prestack azimuth anisotropy correction.Based on the converted wave common receiver point stack,layer stripping method is used.The method is applied in La... |
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| Keywords: | azimuth anisotropy prestack correction shear wave split time-delay between fast wave and slow wave |
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