Conventional pre-stack depth migration imaging techniques separate the migration imaging and static correction processing.In the processing of seismic data from complex mountainous areas,due to the factors such as complex surface condition,drastic lateral veloci-ty variation near the surface,and exposure of high-velocity interval,the static correction based on the assumption of surface consistency may cause wave field distortion.This distortion leads to big errors in calculation of travel time,affecting the effects of depth migration imag-ing.To solve this problem,a full-depth modeling and imaging technique based on true surface migration was proposed.This technique starts with velocity modeling and travel time calculation from the surface elevation,and addresses static correction implicitly in the migra-tion imaging process.It has been satisfactorily applied in the processing of complex mountainous data.
关键词
复杂山地/静校正/初至层析/微测井/真地表/速度建模/波前构建/射线密度
Key words
complex mountainous area/static correction/first-arrival tomography/microlog/true surface/velocity modeling/wavefront con-struction/ray density
维普
万方数据