Natural fractures are well developed in shale gas reservoirs

which have great influence on reservoir reconstruction and later fracturing effect. Therefore

the fracture prediction is carried out by ant tracking technology based on the combination of logging and seismic. Firstly

the curves for the fracture development density of the wells are obtained by the calculation of the natural fractures by well logging. Then

by the comparison of various simulation methods

the Gaussian random method is selected

which can reflect the heterogeneity of fracture development in shale reservoir and establish the natural fracture model between wells. Finally

the Co-Kriging interpolation method is used to reflect the properties of inter-well fracture development

and ant attributes are input for the quality control in order to establish the prediction model of natural fractures in Nanchuan area. According to the prediction results

the fractures in Nanchuan area develop along the NE direction. The fractures in the east wing of Pingqiao anticline are more developed than those in the core

and the fracture network are easy to form. The prediction results are highly consistent with the actual drilling wells. This fracture prediction technology can guide the exploration and development of this area.