Abstract:

Fractures are characterized by the multiple scales,and the seismic wave attributes such as velocity,amplitude and attenuation etc.change with the different fracture level.There are lots of similarities between the fracture-detecting in buried hill reservoir and marginal detecting in image analysis.According to Canny marginal detection definition,the multiple scale marginal detection to the horizon slices f(x,y) of 3D seismic data is equal to the local extreme of wavelet transform modulo,then,the obvious changing points or the edge points of f(x,y) can be determined by the local maximum.In this paper,based on wavelet multi scale boundary detection theory and seismic wave field multi scale characteristics for fracture,a new method of multi scale boundary detection in seismic record prediction is proposed.The result of the application in Zhuanghai 10 buried hill shows that the reservoir predicting results by using wavelet multiple scale marginal detection technology is compatible with the drilling data； it is an effective way in buried hill reservoir predicting and is of guiding significance to the exploration.

Key words: wavelet, multiple scale effect, marginal detection, Zhuanghai 10 buried hill, reservoir prediction, Bohai Bay