一种改进的Q值求取方法
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摘要
地震波在地下介质中传播会产生吸收衰减现象,从而使得地震资料的信噪比和分辨率降低。求取Q值的3种常规方法常Q值扫描法、VSP求值法和频谱比法均不能同时满足Q值的准确性以及时变和空变特性要求。以三维地震勘探资料为例,提出了一种求取Q值的新思路:利用VSP法得到的Q值来约束频谱比法求取的Q值。实际应用结果表明,该方法可以有效地解决Q值的准确性及时变和空变问题,使得Q补偿效果更好,从而使得地震资料提供的地层信息更加准确。
The energy in seismic waves is absorbed when the waves travel in the earth,which causes the S/N ratio and resolution of seismic data to decrease.The three conventional methods to calculate Qvalue,Qvalue scanning,VSP method and spectral ratio method can not meet the accuracy of Q value and the requirement of time and space variations simultaneously.In this paper,a new method to get Qvalue is put forward,based on 3-D seismic exploration data:taking the Qvalue deprived from VSP method to restrain the Qvalue which is deprived from the spectral ration method can effectively solve the accuracy of Qvalue and the problem of time and space variations,thus the results of Qcompensation is more accurate.
The energy in seismic waves is absorbed when the waves travel in the earth,which causes the S/N ratio and resolution of seismic data to decrease.The three conventional methods to calculate Qvalue,Qvalue scanning,VSP method and spectral ratio method can not meet the accuracy of Q value and the requirement of time and space variations simultaneously.In this paper,a new method to get Qvalue is put forward,based on 3-D seismic exploration data:taking the Qvalue deprived from VSP method to restrain the Qvalue which is deprived from the spectral ration method can effectively solve the accuracy of Qvalue and the problem of time and space variations,thus the results of Qcompensation is more accurate.
引文
[1]余振,王彦春,何静,等.反Q滤波方法研究综述[J].勘探地球物理进展,2009,32(5):309-314.
[2]李建华,耿辉,余杰,等.反Q滤波技术在叠前地震资料处理中的应用[J].石油仪器,2009,23(5):48-54.
[3]王正和,崔永福,向东.井控处理中的真振幅恢复与Q补偿方法及应用[J].物探与化探,2008,32(4):434-437.
[4]赵延江,段云卿,杨文军,等.大民屯凹陷高分辨率地震资料处理技术研究[J].物探与化探,2007,31(4):370-373.
[2]李建华,耿辉,余杰,等.反Q滤波技术在叠前地震资料处理中的应用[J].石油仪器,2009,23(5):48-54.
[3]王正和,崔永福,向东.井控处理中的真振幅恢复与Q补偿方法及应用[J].物探与化探,2008,32(4):434-437.
[4]赵延江,段云卿,杨文军,等.大民屯凹陷高分辨率地震资料处理技术研究[J].物探与化探,2007,31(4):370-373.