辽河坳陷低频可控震源地震采集技术应用
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摘要
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。
Low-frequency vibrator excitation has the characteristics of flexible scanning frequency,wider bandwidth of wavelet and high efficient excitation.This technology has been applied in land seismic exploration of Liaohe Depression in recent years,and it is the development direction of seismic acquisition technology in this area.The application effect of test of low-frequency and controllable vibrator,digitalization of seismic monitor in DMT Area of Liaohe Depression is emphatically introduced.The result shows that low-frequency vibrator is conducive to improving the imaging accuracy of complex structure and improving the imaging effect of deep strata slope belt by increasing the signal lowfrequency components and broadening the bandwidth of seismic data.High quality seismic data are obtained in DMT Area in combination with the use of efficient vibrator acquisition techniques,it demonstrates the effectiveness of low-frequency vibrator seismic acquisition technology in complex areas in land of Liaohe Depression.
Low-frequency vibrator excitation has the characteristics of flexible scanning frequency,wider bandwidth of wavelet and high efficient excitation.This technology has been applied in land seismic exploration of Liaohe Depression in recent years,and it is the development direction of seismic acquisition technology in this area.The application effect of test of low-frequency and controllable vibrator,digitalization of seismic monitor in DMT Area of Liaohe Depression is emphatically introduced.The result shows that low-frequency vibrator is conducive to improving the imaging accuracy of complex structure and improving the imaging effect of deep strata slope belt by increasing the signal lowfrequency components and broadening the bandwidth of seismic data.High quality seismic data are obtained in DMT Area in combination with the use of efficient vibrator acquisition techniques,it demonstrates the effectiveness of low-frequency vibrator seismic acquisition technology in complex areas in land of Liaohe Depression.
引文
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