Fracture Identification and the Response Characteristics of Fracture in the Third Drilling Hole of WFSD Project

The borehole of WFSD-3,located in the town of Jiulong in Mianzhu city of Sichuan Province,has comprehensive data and a variety of fracture.Based on imaging logging,studies on the conventional logging methods of the identification of fractures through the WFSD-3hole logging data.This paper sums up the response characteristics of fractures in imaging logging.Then it analyzes response characteristics of fractures of the conventional logging on the same depth.According to the sensitivity level of the various parameters for fractures identification,choose the more sensitive parameters for the further research of automatic identification.In the final analyzes the effect of this method.The results show that,these parameters like AC,DEN,CNL,R_MSL,R_p,m and F_RP have obvious response in fracture,especially AC and DEN are sensitive in low angle fracture.The discriminant function's recognition accuracy is 86.67%,which is constituted by these parameters,yielding relatively satisfactory application results.