高斯射线束偏移技术在渤海LD16-17区的应用

An application of Gaussian beam migration to Block LD16-17 in Bohai Sea

高斯射线束偏移技术是近几年来国外广泛应用的一种新的偏移处理技术,它克服了常规克希霍夫偏移技术在焦散面附近振幅急剧、不固定变化的缺点,在复杂速度构造区域也能保证正常响应。高斯射线束叠前深度偏移技术在渤海LD16-17区取得了很好的应用效果,有效改善了高陡构造和复杂断裂的成像效果,提高了中深层地震资料的信噪比。该项技术在渤海地区有广阔的应用前景。

As a new seismic migration technique widely used in recent years abroad,Gaussian beam migration has overcome the shortcoming of Kirchhoff migration,i.e.rapid and uncertain changes of amplitudes near the caustic,and can ensure a normal response even in the areas of complex velocity structure.The application of Gaussian beam pre-stack depth migration to Block LD16-17 in Bohai Sea has resulted in good effects,including efficiently improving imaging for steep dip structures and complex faults and increasing signal-to-noise ratio in mid-depth intervals.This technique should have a wide application prospects in Bohai Sea.