| 相对保幅的角度域VSP逆时偏移(英文) |
| |
| 引用本文： | 孙文博,孙赞东,朱兴卉.相对保幅的角度域VSP逆时偏移(英文)[J].应用地球物理,2011,8(2):141-149. |
| |
| 作者姓名： | 孙文博 孙赞东 朱兴卉 |
| |
| 作者单位： | 中国石油大学(北京)地质地球物理综合研究中心; |
| |
| 基金项目： | supported by National Basic Research Program of China (No. 2011CB201100); National Department of Science and Technology (No. 2008ZX05004-006) |
| |
| 摘 要： | 本文介绍了一种改进的角度域VSP逆时偏移方法。对VSP逆时偏移中的逆推公式进行了改进,为方便数值计算出相对保幅的角度域共成像点道集(ADCIGs)。此外VSP记录到的波场信息丰富,包括上行波场、下行波场和直达波场等,本文分析了这些波场的响应特征,发现直达波和下行波在角度域共成像点道集(ADCIGs)上都产生了成像噪音,直达波产生的噪音尤为严重。把该方法用于我国西部地区实际观测的VSP资料,不仅获得相对保幅角度域共成像点道集(ADCIGs),而且压制了成像噪音。通过数值模型试算,实际资料的应用验证了该方法的实用性与有效性,从而为VSP偏移速度分析、VSP AVA/AVO分析和反演等提供可靠的基础资料。
|
| 关 键 词： | VSP逆时偏移 角度域共成像点道集 保幅性 |
| 收稿时间： | 26 September 2010 |
Amplitude preserved VSP reverse time migration for angle-domain CIGs extraction |
| |
| Wen-Bo Sun,Zan-Dong Sun,Xing-Hui Zhu.Amplitude preserved VSP reverse time migration for angle-domain CIGs extraction[J].Applied Geophysics,2011,8(2):141-149. |
| |
| Authors: | Wen-Bo Sun Zan-Dong Sun Xing-Hui Zhu |
| |
| Institution: | Sun Wen-Bo1,Sun Zan-Dong1,and Zhu Xing-Hui11.Lab for Integration of Geology and Geophysics,China University of Petroleum,Beijing 102249,China. |
| |
| Abstract: | An improved method of generating angle-domain common-image gathers(ADCIGs) by VSP reverse time migration(RTM) is introduced in this paper.The formula which is used to compute the receiver wavefield for VSP RTM is modified by adding an amplitude correction term in order to conveniently output amplitude-preserved ADCIGs.Compared with the surface seismic data,VSP data contains much richer wavefields.However,the direct and downgoing waves can bring about serious imaging artifacts in ADCIGs,especially the direct... |
| |
| Keywords: | VSP reverse time migration angle-domain common-image gathers(ADCIGs) amplitude preservation |
| 本文献已被 CNKI SpringerLink 等数据库收录！ |
|
