论文详情
准噶尔盆地腹部沙漠区由于地表高程变化大,低、降速层速度和低、降速带底界速度横向不稳定,容易引起叠加剖面的静校正长波长问题,造成构造形态畸变。为解决准噶尔盆地腹部沙漠区长波长静校正问题,从沙漠区的近地表结构研究入手,分析了地震剖面中存在中、长波长静校正问题的原因。试验对比了分层建模法和初至折射法静校正的效果,指出了这两种静校正方法的优、缺点,并提出了静校正量分解与融合的互补方法。此方法有效解决了准噶尔盆地腹部沙漠区长波长静校正问题,消除了地震叠加成像中的构造形态扭曲现象，在实际应用中取得了良好的效果。
In desert area of central Junggar Basin,the great changes of surface elevation and the lateral instability of interval velocity and bottom velocity in the weathering and sub-weathering zones are easy to produce the long wavelength static correction problem in seismic stack section resulting the structural configuration distortion.We analyze the long wavelength static correction of seismic data in desert area of central Junggar Basin.Firstly,we studied near-surface structure of the desert area and analyzed the reason to cause the middle and long wavelength static correction problem in seismic section.Secondly,we compared the effect of layered modeling statics method with first arrival refraction statics method,then pointed out the advantages and disadvantages of these two static correction methods and put forward a new statics method combining the two statics methods.The new method can effectively solve long wavelength static correction problems in desert area of central Junggar Basin and avoid structural configuration distortion in seismic stacking imaging.