| 共反射面元叠加的应用理论——从共反射点到共反射面元 |
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| 引用本文： | 王华忠,杨锴,马在田.共反射面元叠加的应用理论——从共反射点到共反射面元[J].地球物理学报,2004,47(1):137-142. |
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| 作者姓名： | 王华忠 杨锴 马在田 |
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| 作者单位： | 同济大学教育部海洋地质重点实验室，上海 200092 |
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| 基金项目： | 国家自然科学基金委资助，大庆石油管理局资助(4 9894190 -2 4) |
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| 摘 要： | 共反射面元（CRS）叠加是目前认为最好的生成零炮检距剖面的方式. 共反射面元 意指地下某一反射点邻近的一个反射弧段,该弧段在时空域内的走时响应称为CRS叠加面，该 叠加面可视为反射弧段上各共反射点（CRP）的时空域内走时响应的组合. 在一般的共反射 点走时关系基础上,引入两种特征波——Normal波和Normal Incidence Point波，就可以在 傍轴近似假设下,将CRP走时关系推广到反射点邻近的各反射点,将这些反射点的CRP走时关系 加以组合就得到了关于该反射点的共反射面元的走时关系. 考察从共反射点（CRP）到共反 射面元(CRS)的过渡，这一过程提供了CRS叠加的应用理论基础.
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| 关 键 词： | 地震勘探 共反射点(CRP) 共反射面元(CRS) Normal 波 Normal Incidence Point(NIP)波 中心零炮检距射线 傍轴近似 |
| 文章编号： | 0001-5733(2004)-01-137-06 |
| 收稿时间： | 2002-12-29 |
| 修稿时间： | 2003-5-12 |
AN APPLIED THEORY ON COMMON REFLECTION SURFACE STACK--FROM COMMON REFLECTION POINT TO COMMON REFLECTION SURFACE |
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| WANG Hua Zhong\ YANG Kai\ MA Zai Tian Laboratory of Marine Geology NDE,Tongji University,Shanghai ,China.AN APPLIED THEORY ON COMMON REFLECTION SURFACE STACK--FROM COMMON REFLECTION POINT TO COMMON REFLECTION SURFACE[J].Chinese Journal of Geophysics,2004,47(1):137-142. |
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| Authors: | WANG Hua Zhong\ YANG Kai\ MA Zai Tian Laboratory of Marine Geology NDE Tongji University Shanghai China |
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| Institution: | Laboratory of Marine Geology NDE, Tongji University, Shanghai 200092, China |
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| Abstract: | 〓Common Reflection Surface (CRS) stack is the best way at present to simulate zero offset section. It can adapt to weak laterally inhomogeneous media. Common Reflection Surface is a circle segment around an u nderground reflector. Its traveltime response in the time space domain, so cal led CRS stack surface, can be regarded as a combination of all Common Reflection Point (CRP) trajectores in the segment. Based on a general CRP trajectory ex pression, with two kinds of eigen wave——Normal wave and Normal incidence wave being introduced, the traveltime response of CRS can be given by extending CRP e xpression via considering that all rays are reflected on the segment around the reflector according to paraxial approximation. This paper provides the applied t heoretical foundation for CRS s tacking. |
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| Keywords: | Seismic propecting Common Reflection Point (CRP) Common Reflection Surface(CRS) Normal wave Normal Incidence Point(NIP) wave Radius of curvature Central zero offset ray |
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