1. Xinjiang Oilfield Company, PetroChina, Karamay 834000, Xinjiang, China;
2. Xinjiang Wandun Energy Technology Co., Ltd., Karamay 834000, Xinjiang, China;
3. College of Earth Sciences, Jilin University, Changchun 130061, China;
4. Key Laboratory for Evolution of Past Life and Environment in Northeast Asia(Jilin University), Ministry of Education, Changchun 130061, China;
5. Key Laboratory for Oil Shale and Coexisting Minerals, Jilin University, Changchun 130061, China;
6. The Key Laboratory of Marine Reservoir Evolution and Hydrocarbon Accumulation Mechanism of Ministry of Education of China, Beijing 100083, China;
7. Fengcheng Field Operation Zone, Xinjiang Oilfield Company, PetroChina, Karamay 834000, Xinjiang, China

In order to reduce exploration drilling risk,hydrocarbon detection was carried out through the complex resistivity (CR) method in the Xianan slope of Wu-Xia fault belt in the northwestern margin of Junggar Basin. After comprehensive analysis of the result profile,oils tests of eight wells in the study area were calibrated. The results show that the apparent resistivity of 9% and electromagnetic resistivity of 9 ��·m are the thresholds for complex resistivity anomaly of oil and gas identification. 12 anomalies areas were identified in the profile based on the thresholds. Comprehensive analysis on these CR anomalies and the previous exploration results indicate that the Xianan slope in general showed weak anomaly,except the Well Xia039 that showed favorable anomaly. The complex resistivity method has its technical and cost advantages in the detection of trapped oil and gas and can be used as an effective auxiliary detection method for oil and gas exploration.