APPLICATION OF LOW FREQUENCY RECOVERY TECHNIQUE BASED ON HIGH-PERFORMANCE SPARSE ACQUISITION TECHNIQUE TO DONGFENGGANG AREA OF SHENGLI

Recently, the low frequency components of seismic wave have received high attention in seismic exploration. However, low frequency components are difficult to identify from the geophone record and hard to apply. Based on analysis of the performance of the detector, we estimated in this paper the lowest frequency of land piezoelectric detector and made the low frequency recovered by applying low frequency detector (Power spectral density ratio method). Taking the Dongfenggang area of Shengli Oil Field as a case, we designed the acquisition schemes and low frequency recovery process based on high-performance sparse acquisition technique. The actual data show that the lowest frequency of land piezoelectric detector is 3 Hz and the accuracy and resolution of stack profiles have improved significantly.