砂岩型铀矿勘探中的地震资料高分辨率处理方法

High Resolution Processing Method of Seismic Data for the Exploration of Sandstone-type Uranium Deposits

近年来,地震勘探技术在砂岩型铀矿勘探中得到了较广泛应用,为了进一步提高砂岩型铀矿勘探区地震资料分辨率与信噪比,提高地震成像质量,本文对地震数据处理中的关键技术方法进行了较深入研究,主要包括静校正、叠前叠后去噪、反褶积、速度分析、偏移等处理过程及相关处理参数的试验。对伊犁盆地实际地震资料进行了处理,建立了合理的处理流程,同时对比了相同测线新老剖面处理结果,结果表明本文建立的数据处理方法流程切实可行,明显提高了地震资料分辨率与信噪比。

Seismic exploration technique has been widely used in sandstone-type uranium exploration in recent years.In order to further improve seismic resolution,signal-to-noise ratio and imaging quality in the area of sandstone-type uranium deposits,crucial methods and techniques have been studied in this paper,including static correction,pre-stack and poststack noise attenuation,deconvolution,velocity analysis,migration and tests dealing with related parameters.Seismic data acquired from Yili Basin are processed and reasonable processing flow are set up.Meanwhile,new profiles are compared with old profiles obtained from the same survey line.The results show that the seismic processing methods and flow in this paper are feasible,and the seismic resolution and signal-to-noise ratio are obviously improved.