风积沙区域煤矿三维地震激发因素选取方法探索及应用

Exploration and application of three dimensionalseismic excitation factors selection method in coal minesof eolian sand area

在沙漠风积沙覆盖层厚度差异大的勘探区,根据覆盖层厚度分段试验,结合低速带调查,确定勘探区合理井深、药量,以便提高单炮分辨率,拓宽频带,从而获得能够满足完成地质任务要求的最佳激发因素,确保获得较高信噪比和分辨率的地震原始资料,为查明勘探区地质构造、煤层赋存形态等情况,完成地质任务奠定基础。

In the exploration area with large thickness difference of eolian sand caprock in desert,according to the sectional test of caprock thickness and investigation of low speed zone,the reasonable well depth and dosage in the exploration area were determined,so as to improve the resolution of single shot and broaden the frequency band,which could obtain the best excitation factors meeting the requirements of geological tasks,and ensure the acquisition of seismic raw data with high signal to noise ratio and resolution.The study would lay the foundation for identifying the geological structure and coal seam occurrence form in the exploration area and completing the geological task.