二维地震方法在宁夏中卫某勘查区找煤过程中的应用

Application of 2D Seismic Method in Coal Prospecting in Zhongwei Exploration Area of Ningxia

在煤矿二维地震勘探方法中,为了认准目的地层反射波,准确标定反射波层位,保证地震资料解释结论的可靠性,笔者利用钻孔的声波测井曲线,做人工合成记录,对地震时间剖面重新进行标定,确定时间剖面上反射波的地质意义,分析煤层与非煤层对应反射波的特征,并结合已有地质资料指出该勘查区疑似煤层反射波为煤层反射波的可能性小。根据对疑似煤层反射波的解释,可以初步确定煤层的分布范围及赋存位置,有助于指导各煤矿勘查区内钻探工程的部署。

The calibration of reflected wave horizon is the basis of the interpretation of seismic data. Only when the reflected waves of the ground layer are recognized, can the reliability of the data interpretation conclusion be guaranteed. This paper uses the sonic logging curve of the borehole to make a synthetic record, calibrates the seismic time profile, and determines the geological significance of reflected waves on the time profile, then it analyzes the characteristics of the corresponding reflected wave of coal seam and non-coal seam, points out that it is unlikely that the coal seam reflection wave in this exploration area is coal seam reflection wave. This research method can determine the distribution range and location of coal seam, which is helpful to the deployment of drilling engineering in each coal exploration area.