【摘要】 在山地地震资料的常规处理中,速度分析、动校正和叠加通常在CMP面上进行。本文针对山地地震资料的有限差分法叠后时间偏移问题,从起伏地表条件下的理论模型和实际资料两个方面入手,对差分法叠后时间偏移的零速度层方法进行研究,并用不同的填充速度进行了偏移试验。研究表明,在起伏地表和水平基准面之间填充替换速度进行偏移会导致成像误差,而填充零速度层可得到正确的偏移成像结果。更多还原

【Abstract】 In conventional mountain seismic data processing,the velocity analysis,normal moveout correction and stacking are conducted on CMP plane.Regarding the difference method post-stack time migration in mountain seismic data processing,under the conditions of irregular surface the zero velocity method for difference method post-stack time migration was studied and the migration testing was conducted by using different replacement velocity datasets based on theory model and field data.The studies show that filling replacement velocity between irregular surface and horizontal datum in migration processing could cause imaging error,while filling zero velocity later could obtain accurate imaging results.更多还原