APPLICATION OF LOW FREQUENCY RECOVERY TECHNIQUE BASED ON HIGH-PERFORMANCE SPARSE ACQUISITION TECHNIQUE TO DONGFENGGANG AREA OF SHENGLI
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摘要:
地震勘探中，地震波低频成分越来越受到重视, 而常规检波器记录中的低频有效成分难以被充分识别利用。基于检波器性能分析，通过布设低频检波器估计陆用压电检波器可恢复的最低有效频率并实现低频恢复；在此基础上，设计胜利东风港探区高性能低频检波器稀疏布设方案以及低频数据恢复流程。实际数据表明：对于胜利探区三维勘探，陆用压电检波器最低有效频率能够恢复至3 Hz，成像后的叠加剖面的精度和分辨率有显著提高。
Abstract: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.
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Key words:
- sparse acquisition /
- low frequency recovery /
- high resolution
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