Abstract: Complexity of carbonate reservoir pore space allows single parameter or method to give non-uniqueness of solutions and be likely limited by regional geologic conditions. For this reason, this paper presents a method for confidence analysis-based integrate fracture detection. The method makes use of correlation between well log fracture interpretation and other fracture detection results to weight all results from different detecting methods in order to improve the detection reliabilities. The method can be used in different areas like Tahe oilfield without any restriction from complicated geologic conditions. The case study shows better effectiveness than before.

Key words: carbonate rock, fracture, detection, confidence limit