AVO反演预处理中的检波器非径向接收能量补偿  

Compensation for non-vertical received energy of geophone in preprocessing of AVO inversion

作　　者：苑春方[1] 余钦范[2] 彭苏萍[1] 彭晓波[1] 杨超[3] 陈云[1] 

机构地区：[1]中国矿业大学(北京)资源与安全工程学院 [2]中国地质大学(北京)地球物理与信息技术学院 [3]海军航空工程学院电子信息工程系

出　　处：《石油地球物理勘探》2007年第1期76-80,共5页Oil Geophysical Prospecting

基　　金：国家自然科学基金(50490271);国家重大基础研究计划(2005CB221501;2002CB211707);"十五"国家科技攻关重点项目(2001BA803B0403);国家创新研究群体基金(50221402);教育部"长江学者和创新团队发展计划"(IRT0408);国家杰出青年基金(50025413);教育部科学技术研究重大项目(306002)等资助。

摘　　要：在地震勘探中,当炮检距非零时,检波器接收方向与反射波传播方向的夹角是非零的(即非径向接收),这一非零夹角必将产生能量损失,进而对AVO反演产生显著影响。为此本文根据Snell定律导出非径向损失补偿公式,以模型实例讨论了非径向接收对反射系数的影响,并提出了一种简单而有效的非径向能量损失补偿方法。对比用该方法做非径向损失补偿前后的AVO反演结果,其差异显著,说明本文方法能够明显改善AVO反演的质量。In seismic exploration, the angles between the geophone receiving directions and reflection propagating directions are non-zero for non-zero offsets (non-vertical receiving), which should make the energy loss and further produce significant influence on AVO inversion. For that reason, the paper induced compensation formula for non-vertical loss based on Snell's law, discussed the influence of non-vertical receiving on reflection coefficients by the cases of model, and presented a simple and effective compensation method for non-vertical energy loss. The AVO inversions of pre- and post-compensation for non-vertical loss implemented by this method demonstrated significant difference between them,and showed the method presented in the paper can greatly improve the quality of AVO inversion.

关 键 词：地震数据处理 AVO反演 非径向接收 非零炮检距 非径向能量损失 能量补偿 

分 类 号：P631.443[天文地球—地质矿产勘探]