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可控震源激发具有扫描频率设置灵活、子波频带宽、激发高效的特点,近年来在辽河坳陷陆上地震勘探中已攻关应用,是该区今后地震采集技术的发展方向。重点介绍了低频可控震源试验及数字化地震监控技术的在辽河坳陷DMT地区应用效果。低频可控震源通过增加低频信号成分,拓宽地震资料频宽,利于提高复杂构造的成像精度,改善斜坡带深层地层成像的成像效果。通过联合应用低频可控震源高效采集配套技术,获得了DMT地区高品质的地震资料,证明了低频可控震源地震采集技术在辽河坳陷陆上复杂区地震勘探中的有效性。
Vibrator excitation has the characteristics of flexible setting of scanning frequency, frequency bandwidth of sub-wave and high excitation efficiency. In recent years, it has been applied in onshore seismic exploration in Liaohe Depression, which is the development direction of seismic acquisition technology in this area. The effects of low frequency vibroseis test and digital seismic monitoring technology on DMT in Liaohe Depression are introduced. The low-frequency vibroseis broadens the bandwidth of seismic data by increasing the low-frequency signal components, improves the imaging precision of complex structures and improves the imaging performance of deep formation imaging in the slope. The high-quality seismic data in DMT area was obtained through the joint application of low-frequency vibroseis acquisition technology, which proves the effectiveness of low-frequency vibroseis seismic acquisition technology in the onshore complex area of Liaohe depression.