提高黄土塬地震资料信噪比的方法研究

A method for improving the signal-to-noise ratio of the seismic data of loess tableland and its application effect

以鄂尔多斯盆地西南部巨厚黄土塬区地震勘探为例,针对黄土塬地震资料信噪比低的特点,以中生界与古生界砂岩储层预测和古地貌刻画为目标,通过对影响地震资料信噪比的因素分析和不同去噪技术的研究,提出了适应黄土塬区提高地震资料信噪比的有效方法,并在实际应用中取得了良好的效果.

Taking the seismic exploration of the loess tableland of huge thickness in the southwestern Erdos Basin as an example,the factors of influencing the signal-noise ratio of the loess tableland seismic data are analyzed in order to predict the reservoir characteristics of Mesozoic and Paleozoic and describe their paleogeomorphology,and a series of denoising methods are proposed,including united static correction,surface consistency remaining fine correction,high-precision velocity analysis,multi-area or multi-area alternating noise suppression and coherent superposition.These methods are very effective to improving the seismic data signal-to-noise ratio in the loess tableland area.The practical application in the loess tableland of huge thickness in the southwestern Erdos Basin achieved good effect.