Abstract: According to core and conventional log data from Feixianguan formation in Shaguanping gas field, the fractural development and possible distribution on well profile in studied area are identified, the parameters about fractures are estimated and evaluated. The results show that there exist vertical and oblique fractures of tectonic origin as well as shale-packed fractures of diagenetic stage. The vertical fractures are as effective and structural ones with uneven development degrees. Hence, the structural fracture distribution in studied area has been predicted and evaluated by applying the principal curvature for structural deformation. Study shows that developed fractures should be found in locations of big deformation and high curvature such as structural axes, structural high and structural nose, etc.

Key words: Shaguanping gas field, well logging, fracture, curvature