Abstract: Aiming at the dolomitic limestone fractured reservoir in the northwestern margin of Junggar basin, a series of the fractural detection methods are adopted, including the edge detection based on wavelet multiscale product, generalized Hilbert transform and curvature analysis. The model experiment shows that these methods are of high horizontal resolution and anti-noise ability. Applied to the first member of Fengcheng formation in Wuerhe-Xiazijie fault belt and by correlation analysis to regional structural characteristics and drilling/well data, it is indicated that these methods are applicable for this area. The three methods can be mutually confirmed and supplemented for the purpose of improving the reliability of the detection results.

Key words: Junggar basin, Wuerhe-Xiazijie fault belt, fracture detection, wavelet multiscale product, generalized Hilbert transform, curvature