改进射线追踪算法的微震源反演
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摘要
基于射线追踪理论,提出了一种改进的试射法路径追踪算法,可以较准确地模拟射线在层状介质中的传播,不但可计算出任意检波点能接收到的所有的反射波的旅行时及射线路径,而且具有快速、准确、适应复杂构造模型的优点。利用共扼梯度法,通过正演模型的修改迭代,研究微地震层状模型的反演算法。最后,对实际的检测资料进行反演,反演结果基本上和实际资料吻合。
Based on the ray tracing theory,the authors put forward an improved trial firing path tracing algorithm,which can simulate the propagation of rays in layered media quite accurately.This algorithm can not only figure out the journey time and the ray paths of all reflection waves received by any detection point but also has the merits of rapidness,accuracy and adaptability to complex structural models.With the conjugate gradient method and through altered iteration of the forward model,the authors studied the inverse algorithm of the microearthquate layered model.Finally,inversion of practical test data was performed,and the result is basically consistent with the real data.
Based on the ray tracing theory,the authors put forward an improved trial firing path tracing algorithm,which can simulate the propagation of rays in layered media quite accurately.This algorithm can not only figure out the journey time and the ray paths of all reflection waves received by any detection point but also has the merits of rapidness,accuracy and adaptability to complex structural models.With the conjugate gradient method and through altered iteration of the forward model,the authors studied the inverse algorithm of the microearthquate layered model.Finally,inversion of practical test data was performed,and the result is basically consistent with the real data.
引文
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[6]张建中,陈世军,余大祥.最短路径射线追踪方法及其改进[J].地球物理学进展.2003,18(l):167.
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[2]栾文贵.地球物理中的反问题[M].北京:科学出版社,1989.
[3]朱光明.垂直地震剖面法[M].北京:石油工业出版社,1988.
[4]赵鸿儒,孙进忠,唐文榜,等.全波震相分析[M].北京:地质出版社,1991.
[5]张霖斌,许云,乌达巴拉,等.地震反射波波前法射线追踪[J].石油地球物理勘探,1995,30(1):50.
[6]张建中,陈世军,余大祥.最短路径射线追踪方法及其改进[J].地球物理学进展.2003,18(l):167.
[7]刘洪.李幼铭.射线追踪方法的发展现状[J].地球物理学进展,2000,15(1):123.
[8]崔基泰.VSP三分量资料合成的新方法[J].石油地球物理勘探,1994,29(3):234.
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