山地高密度三维地震采集技术在准噶尔盆地南缘地区的应用及效果

Application and effect of 3D seismic acquisition technique with high density into the mountainous area in the southern margin of Junggar basin

高密度地震采集成本较高,尤其是高密度三维地震采集,因此,提高地震采集效率、控制地震采集成本尤为重要。山地高密度地震采集中,震源井施钻、排列布设和迁移是影响采集效率的重要因素。准噶尔盆地南缘山地地区实施的第一块高密度三维地震采集,使用浅井小药量激发、单点检波器接收,提高了地震采集的效率,且所获得的地震资料分辨率和信噪比有所提高,对复杂构造和小断层的成像有一定改善。

The cost of seismic acquisition technique with high density is high,especially 3D seismic acquisition with high density.Therefore,it is of great importance to improve the efficiency of seismic acquisition and control the cost.In high—density seismic acquisition in mountainous areas,drilling,arrangement and migration of source wells are important factors influencing the acquisition efficiency.The first high—density 3D seismic acquisition into mountainous area of the southern margin of Junggar basin was carried out,and the efficiency of seismic acquisition was improved by the use of small explosive quantity in shallow wells and single point detectors.The resolution and signal—to—noise ratio of the obtained seismic data are improved,which hence improves the imaging quality of complex structures and small faults.