多尺度地震剩余静校正方法及应用
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摘要
对常规的剩余静校正反演方法进行了分析,找出了大静校正量使剩余静校正反演产生"周波跳跃"的原因,发现模型道的质量与地震波的视周期有关,大静校正量是一个相对量,当静校正量大于地震波视周期的一半以上时,模型道质量变差,线性反演方法会出现"周波跳跃"现象,据此建立了合理的基于模型道的多尺度剩余静校正方法,该方法通过尺度变换,把小尺度下的大静校正量问题转变为大尺度下的小静校正量问题,从而避免"周波跳跃"的产生,同时考虑大尺度的静校正精度低的问题,采用多尺度逐步校正方法实现大静校正量的计算。实际资料的试算表明该方法是有效的,具有线性反演方法的较高计算效率特点,便于处理人员使用。
The conventional inversion method for seismic residual static correction is analyzed,and the reason for it is found.The quality of model trace is related to the apparent cycle of seismic wave.As a relative quantity,when the static correction quantity is larger than a half or more of the apparent cycle,the model trace's quality becomes poor,emerging the cyclic-skip phenomenon using linear inversion method.According to this,the multiscale residual static correction method based on model trace is developed,by which the large static correction quantity issue under small scale can be converted into the small static correction quantity issue under large scale,thus avoiding the appearance of cyclic-skip phenomenon.The low accuracy of the large scale static correction can be considered at the same time.So the large static correction quantity calculation could then be realized by using the multiscale inversion algorithm.The case study shows that this method is effective,efficient and convenient for use.
The conventional inversion method for seismic residual static correction is analyzed,and the reason for it is found.The quality of model trace is related to the apparent cycle of seismic wave.As a relative quantity,when the static correction quantity is larger than a half or more of the apparent cycle,the model trace's quality becomes poor,emerging the cyclic-skip phenomenon using linear inversion method.According to this,the multiscale residual static correction method based on model trace is developed,by which the large static correction quantity issue under small scale can be converted into the small static correction quantity issue under large scale,thus avoiding the appearance of cyclic-skip phenomenon.The low accuracy of the large scale static correction can be considered at the same time.So the large static correction quantity calculation could then be realized by using the multiscale inversion algorithm.The case study shows that this method is effective,efficient and convenient for use.
引文
[1]Rothman D H.Automatics estimation of large residual staticscorrections[J].Geophysics,1986,51:332-346.
[2]井西利,杨长春,李幼铭,等.地震静校正全局最优问题的求解[J].地球物理学报,2002,45(5):707-713.
[3]姚姚.地球物理非线性反演模拟退火法的改进[J].地球物理学报,1995,38(5):643-650.
[4]林依华,尹成,周熙襄苹,等.一种新的求解静校正的全局寻优法[J].石油地球物理勘探,2000,35(1),1-12.
[5]李录明,罗省贤.复杂三维表层模型层析反演与静校正[J].石油地球物理勘探,2003,38(6):636-646.
[6]张继国,刘连生.复杂区初至层析反演静校正[J].石油地球物理勘探,2006,41(4):383-385.
[7]苟量,彭真明,王克斌.混合优化自动剩余静校正方法研究[J].石油地球物理勘探,2005,40(4):454-458.
[8]林依华,张中杰,尹成,等.复杂地形条件下静校正的综合寻优[J].地球物理学报,2003,46(1):101-106.
[9]李丽,陈秀娟,井西利.基于均匀设计的自动剩余静校正方法[J].新疆石油地质,2009,30(1):121-123.
[2]井西利,杨长春,李幼铭,等.地震静校正全局最优问题的求解[J].地球物理学报,2002,45(5):707-713.
[3]姚姚.地球物理非线性反演模拟退火法的改进[J].地球物理学报,1995,38(5):643-650.
[4]林依华,尹成,周熙襄苹,等.一种新的求解静校正的全局寻优法[J].石油地球物理勘探,2000,35(1),1-12.
[5]李录明,罗省贤.复杂三维表层模型层析反演与静校正[J].石油地球物理勘探,2003,38(6):636-646.
[6]张继国,刘连生.复杂区初至层析反演静校正[J].石油地球物理勘探,2006,41(4):383-385.
[7]苟量,彭真明,王克斌.混合优化自动剩余静校正方法研究[J].石油地球物理勘探,2005,40(4):454-458.
[8]林依华,张中杰,尹成,等.复杂地形条件下静校正的综合寻优[J].地球物理学报,2003,46(1):101-106.
[9]李丽,陈秀娟,井西利.基于均匀设计的自动剩余静校正方法[J].新疆石油地质,2009,30(1):121-123.
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