Well constrained non-stationary phase correction

作者：Liu Yu-Jin^*; Li Zhen-Chun; Wu Dan; Wang Qi

来源：Acta Geophysica Sinica, 2014, 57(1): 310-319.

DOI：10.6038/cjg20140127

• Phase correction
• Local similarity
• Non-stationary
• Well constrained
• Plane-wave prediction operator

Zero-phasing of wavelet is essential to improve the quality of stack profile and enhance the resolution of seismic data in seismic data processing. Conventional phase correction method estimates the phase of borehole-side seismic trace according to logging synthetic records and applies constant phase correction to the entire profile. The method has low precision as the non-stationary phase is not taken into consideration. Phase attribute varying with time and space can be estimated based on the criterion of local kurtosis maximization or local similarity maximization with the envelope, but these methods are restricted by the limitation of their criterion. Aiming to solve these problems, we proposed a new well constrained non-stationary phase correction method based on the local seismic attribute and local plane-wave model. The proposed method is more precise than conventional method. Experimental results with synthetic and field data show that the proposed method can effectively improve the quality of stack profile and enhance the resolution of seismic data after zero-phasing.

• 出版日期2014-1
• 单位中国石油大学（北京）