优势频带分频相位分析技术的应用

The Application of Analyzing Spectral Decomposition Phase of Preponderant Frequency Channel

断裂系统的精细解释是构造落实和岩性分析的基础,基于相干体、倾角/方位角等属性进行断层解释通常受到地震资料品质和相干参数选取的限制,应用效果差别较大。本文提出了基于优势频带分频相位体分析技术进行断层识别的新方法,通过观察不同频率的相位滞后分布,较好地实现宽频带地震资料的断裂系统识别,实际资料试算结果表明分频相位体包含了更多的地层不连续性的信息,具有较高的分辨率。

Detailed fracture system analysis is the foundation for precise structure and stratigraph description. The application effects based on the different interpreting methods such as coherence cube and Dip/Azium are distinct because of the limitation in quality of seismic data and setting coherence parameter. In this paper, a new fracture description method-analyzing slice of spectral decomposition phase cube of preponderant frequency is introduced. The fracture system is identified by observing different frequency phase-lag slices when the frequency channel of seismic is wide. It shows decomposition phase cube contains more discontinguous information of strat and has higher resolution through actual data operation.