【摘要】 Kirchhoff积分法速度快、适应性好,是目前石油勘探界使用最为普遍的叠前深度偏移技术,该算法需要快速稳定的旅行时求取方法。快速步进算法(FastMatching Method)是建立在程函方程基础上的旅行时计算方法,它具有速度快、无条件稳定、可以适应复杂地质模型的特点。将快速步进算法(FMM)进行射线追踪所得到的旅行时,运用于对地震数据进行的Kirchhoff叠前深度偏移中。实验结果表明,Kirchhoff积分法与快速步进算法的结合是成功的,提高了偏移的速度,偏移结果良好。更多还原

【Abstract】 Kirchhoff integral method is the most universal prestack depth migration technology in petroleum exploration because of fast calculating ability and good adaptability.The fast and stable travel-time calculational method is required by Kirchhoff integral method.Fast Matching Method is a travel-time calculational method based on eikonal equation,it has characteristics of fast calculating ability and unconditional stability,and the method can be used in complex geological model.The travel-time obtained by ray tracing of FMM is used in Kirchhoff prestack depth migration.The experimental results show that the combination of Kirchhoff integral method with FMM is successful,and improve the velocity of migration effectively,the migration results are satisfactory.更多还原