【摘要】 被动源地震成像是基于地下反射波响应和透射波响应之间的关系,通过在地表接收由地下非人工震源发出的透射波响应,利用互相关运算来合成反射波响应的方法.合成的反射波响应,又称虚炮集记录等价于地表地震剖面记录.本文研究了由地下随机分布的被动源发出的透射波记录来合成虚炮集记录的基本原理,推导了反射波记录和透射波记录的关系公式;并通过数值模拟方法,分析了被动源成像的可行性.结果表明:利用被动源地震信息进行成像是可行的.更多还原

【Abstract】 Passive seismic imaging is based on the relation between the reflection and the transmission responses of the subsurface.Let one have the transmission responses measured at surface in the presence of the non-artificial seismic source in the subsurface.The reflection response can be obtained by the cross-correlation of the transmission responses.The simulated reflection response known as virtual shot gathers record is equivalent to surface seismic profile.Here we investigate the basic principles of synthesizing the virtual shot gathers record from the transmission response in the presence of passive source randomly spaced in the subsurface.Derive the relation formula between the reflection and the transmission responses and study the feasibility through numerical simulation.更多还原