层析静校正技术在复杂地表厚黄土区中的应用

Application of Tomographic Static Correction Technique in Complex Surface with Thick Loess Layer

地形复杂地区起伏大,沟壑纵横,建立表层结构模型较困难,利用折射波静校正法无法解决厚黄土区长波长静校正问题。层析静校正方法是提取近地表速度模型来求取高精度的炮点和检波点的静校正量,具有地表适应性强、统计性好的特点。采用层析反演静校正方法能较好地解决复杂地表厚黄土区静校正问题,提高了地震资料的品质,构造反映明显,取得了良好的实际应用效果。

Region undulating was large in terrain complex district, Ravines and gullies criss-cross, surface structural model was built difficulty, the problem of long wavelength static correction of thick loess region could not be solved by refraction static correction method. Tomographic static correction method is extract speed model nearly surface, then high precision shot point and static correction energy of geophone, it＇ s surface adaptability and statistics are good, complex surface thick loess district static correction problem was solved better by tomographic inversion static correction, the quality of seismic data was improved, structural reflection obviously, and practical results was good.