Abstract: In view of fractural detection, a variety of methods are adopted in terms of fractural size, but different methods give some different effects. P-wave azimuth anisotropy technique is now one of developing and improving techniques for reservoir fractural detection at home and abroad. According to variation of amplitude, frequency and velocity with azimuth when P-wave propagates in anisotropy medium, this paper presents a method for detection of fracture-developed azimuth and density in deep volcanic reservoir. It is found that the prediction result by this method is related closely with microscopic feature of fracture-developed zone. Taking the volcanic reservoir in F block in Xujiaweizi fault depression as a target, its fractural detection has been made with good effect.

Key words: P-wave, anisotropy, fracture, amplitude, frequency