高大沙丘区地震采集方法研究与运用

Analysis and application of seismic acquisition method in large and high sand-dune area

塔里木盆地高大沙丘区地震资料采集中常遇到两大难点:一是深井钻井效率低;二是采集资料成像差。通过分析论证,提出了"抽稀加密补偿"变观设计方法,抽稀高部位炮点,加密中低部位炮点。通过试验,证明该方法有效,并将其成功应用到TDB地区的二维地震采集中,既提高了地震钻井效率,降低了施工成本,又明显改善了地震资料成像效果。

Collecting the seismic data in the large and high sand-dune areas of Talimu Basin,there are usually two main difficulties：1） low efficiency of deep drilling;2） poor imaging of acquisition seismic data.By analyzing the proof,a new design method is suggested to address the two difficulties by picking up the shots in high location,and making up the shots in middle and low location.The method was proved to be efficient by the results of tests and applied successfully in the 2-D seismic data acquisition of TDB area.The method can significantly improve the seismic drilling efficiency and the seismic imaging quality.