沙漠地区老地震资料的处理技术及效果分析

Processing of old seismic data from desert and its effect analysis

叠前时间偏移技术是一项解决地层倾角大、断层复杂成像的关键技术,可以求取准确的速度场,偏移后断层清晰。将该项技术应用到道距、仪器和采集参数不同,且覆盖次数低、信噪比较差的二维老地震资料处理中,取得了好的效果,说明了该方法在低覆盖和信噪比差的老资料处理中具有很大的潜力。

Prestack time migration is a key technology that can image steep dip angle formation and complex fault system.It yields accurate velocity field and definite fault compared to poststack time migration.We applied prestack time migration to old poor signal-to noise ratio 2-D seismic lines acquired with different receiver interval,instrument,and field parameters.Desired results have been achieved,which manifests the potential of prestack time migration in improving quality of old seismic data of low fold and poor SNR.