基于球面波近似算法的地震射线追踪改进
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摘要
射线追踪是一种重要的地震数据处理工具,而地震波旅行时的计算是射线理论的核心问题。平面波近似旅行时计算方法精度低,且对于介质速度的适用性弱,因此本文在精度较高的球面波近似旅行时计算方法的基础上,对射线追踪算法提出了改进。数值模拟结果表明了该算法的正确性,能够有效地处理速度畸变界面,在不影响计算精度的情况下提高计算效率。
Ray tracing is an important tools of seismic data processing,and seismic traveltime calculation is the key problem of ray theory.Plane wave approximation algorithm has low accuracy,and weak adaptive of medium velocity,so in this paper,it makes improvement about ray tracing algorithm based on spherical wave approximation algorithm.The data simulation results indicate that this algorithm is right,and able to handle speed distortion interface efficiently,improving calculation efficiency without producing an effect on calculation accuracy.
Ray tracing is an important tools of seismic data processing,and seismic traveltime calculation is the key problem of ray theory.Plane wave approximation algorithm has low accuracy,and weak adaptive of medium velocity,so in this paper,it makes improvement about ray tracing algorithm based on spherical wave approximation algorithm.The data simulation results indicate that this algorithm is right,and able to handle speed distortion interface efficiently,improving calculation efficiency without producing an effect on calculation accuracy.
引文
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[2]赵改善,郝守玲,杨尔皓,等.基于旅行时线性差值的地震射线追踪算法[J].石油物探,1998,6(2):14-24.
[3]Schneider W A,Ranzinger K A,et al.A dynamic program-ming approach to first arrival traveltime computation in mediawith arbitrarily distributed velocities[J].Geophysics.1992,57(1):39-50.
[4]王忠华,方正茂,徐兆涛,等.地震波旅行时计算[J].石油地球物理勘探,1999,3(2):155-163.
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