一种基于信息熵理论的地震子波相位校正方法

A method for seismic wavelet zero-phasing based on information entropy theory.

从信息论的角度出发,提出了一种新的子波相位校正方法。在常相位假设的基础上,通过以离散信息熵作为量化标准对无井记录的地震数据进行相位扫描,进而确定出能够将剩余相位影响降至最低的相位值,并使用此相角对地震记录进行相位校正,从而使剩余子波接近或达到零相位,以提高地震资料质量。模拟合成记录和实际资料的应用结果证实了该方法的可行性和有效性。

Aligning with information theory,this paper proposes a new approach for phase correction of wavelet.Based on the theory of consistent phase, this algorithm first scans phase of seismic data with divergent information entropy as its criterion, then defines a phase value which has minor impact on the residual phase,and finally uses it to correct phase for making residual phase to zero phasing. Tests on synthetic and real dataset have verified feasibility and effectiveness of this method.