Abstract:As time function of seismic wave propagation in subsurface,seismic trace is the response characteristic of reflection signal from the layers.Complex seismic trace analysis method is based on the Hilbert transform of the seismic signal,from which instantaneous amplitude,instantaneous phase and instantaneous frequency can be calculated.Three instantaneous attribute parameters play an important role in reservoir prediction and characterization.However,the frequency-dependent characteristic induced by the existed hydrocarbon in reservoir porous medium couldn't be found in the instantaneous frequency attribute section.The main reason is the lower resolution and complicate interpretation resulted from the phase shift effect on the computing process.In this paper,the conventional instantaneous frequency calculation method is reviewed and a novel local attribute technique is introduced into the local frequency attribute calculating method.The application of real field seismic datasets for hydrocarbon detecting in gas reservoir area indicates that the local frequency attribute can show the frequency-dependent response with the fluid in reservoir with higher signal-to-noise ratio and interpretation ability.Moreover,the integrated interpretation combined with the converted-wave seismic attribute can improve the ability of reservoir prediction and qualitative fluid detecting.
陈双全, 李向阳. 应用局部频率属性检测天然气藏[J]. 石油地球物理勘探, 2012, 47(5): 754-757.
Chen Shuang-quan, Li Xiang-yang. Gas reservoir detection based on local frequency attributes. OGP, 2012, 47(5): 754-757.