地质雷达在复杂山地近地表调查中的应用

Application of ground penetrating radar in the near-surface survey of complex mountain areas

复杂山区近地表调查技术是制约地震资料品质的主要因素.地质雷达可以高效准确得到表层结构,为地震静校正提供依据.本文利用地质雷达在四川南江山区进行了近地表调查,所用天线为50MHz的拖缆式天线,通过微测井数据进行标定,精确得到了测线近表层结构.结果表明配置拖缆式天线的地质雷达较适合复杂山区施工,是建立地表浅层结构调查的有效手段,而且处理结果显示采用近地表调查数据进行静校正的地震品质得到了提高.

The near-surface survey techniques in complex mountain areas is a key factor controlling the seismic acquisition, the ground penetrating radar（GPR） can abtain near-surfac structure effectively and accurately for static correction, this paper uses GPR with 50 MHz cable antenna to survey near-surface structure in Nanjiang mountain areas of Sichuang, then used microlog to correct the data, ultimately abtained the near-surface structure accurately. the result show that the GRP with cable antenna is a effectively way for near-surface survey in complex mountain areas, the processing result also show that the seismic acquisition become better by static correction with near-surface survey data.