Abstract:The Jiyuan depression is the hydrocarbon-bearing area discovered earliest in North China. Terribly complicated seismic-geological condition and very heavy multitudinous noises result in very low signal jnoise ratio of seismic data in this area, which severely obstructed hydrocarbon exploration in this area, 3-fence, research of seismic rnethods for this area has been made systematically. Reasonable seismic data acquisition pwrarneters were determined by making detailed surface-layer analysis and overall field tests, and by designing expert system with the use of spectral analysis data and field operation data. Consequently, special field method (including deep shot hole, big array length, high stacking fold and high low-cut filtering) was adopted to improve raw seismic data obviously. Furthermore, good static correction, correct stack velocity and reasonable prestack two-dimensional filtering were used to remove seismic noise in data processing. The above methods can improve signal jnoise ratio and result in qualified seismic data which favour structural and lithologic interpretations.
梁传坤. 提高强噪声区地震资料信噪比的有效方法[J]. 石油地球物理勘探, 1991, 26(5): 600-616.
Liang Chuankun. Effective methods for improving signal/noise ratio of seismic data collected from heavy noisy area. OGP, 1991, 26(5): 600-616.