APPLICATION OF REFRACTION WAVE STATIC CORRECTION TO SUMATOU STRUCTURE

Sumutou structure is affected by both topographic irregularity and variation of wind deposits.So,a problem of static correction may exists in primary seismic data resulted in largely impacting on the imaging effect and structural shape of stack section.To eliminate the effect of near-surface media on refraction wave,the refraction wave static correction in CGG seismic-data interpretation system is utilized to carry out a linear dynamic correction to primary seismic data,to determine the refractive layer’s velocity and offset scope,to acquire the static correction mass at both common shot domain and common receiver domain and then to correct seismic trace data.For 3D seismic data of Sumatou structure,this correction is effective and can lead to the effective refraction event more continuous and clear.Moreover,the quality of stack section is increased,the imaging effect is improved and a next interpretation becomes easily.