【摘要】 为了得到较好的成像效果,在山前高陡复杂构造区的地震资料处理中,一般采用叠加速度作为成像速度。但由于受高陡地层、膏盐岩塑性地层变形和地层逆掩推覆的影响,叠加速度并不能真实反映地下地层的速度变化规律,因此利用叠加速度资料、采用常规的速度建场方法难以准确落实构造。本文针对高陡复杂构造区的构造特点,结合多年山前复杂构造区的速度研究及建场经验,提出了适用于高陡复杂构造区速度研究思路及建场方法——高陡构造区层速度替换建场法。该方法在东秋里塔格构造带构造落实中应用效果较为明显,为东秋里塔格构造带的油气勘探提供了比较可靠的构造图。更多还原

【Abstract】 In complex piedmont high steep structural regions, stack velocities are imaging velocities used to obtain better imaging results in seismic data processing, which can’t reflect the velocity-variant law of underground horizons because of impact of deformation of plastic salt formation and over-thrusting formation. Therefore, using stack velocity data and ordinary velocity-field-building method are difficult to correctly determine the structures. In view of the feature of complex high steep structural region with many years’ study of velocity and field-building experiments, the paper presented ve- locity-studied idea and field-building method suitable for complex high steep structural region-interval-velocity-replaced field-building method for complex high steep area. The method was used to determine structural belt and achieved good results, provided a reliable structural map for oil/gas exploration in East Qiulitage structural belt.更多还原