Abstract: The Chang?9 member in Honghe oilfield of Ordos basin is of huge oil and gas resource potentials, its hydrocarbon accumulation and productivity are controlled by the fault/fracture system. The fractures are mainly regional structural fractures and fault?associated or derived fractures. Based on the fracture characteristics of outcrop, cores, imaging logging and genesis analysis, the palaeostress field of Yan?shan and Himalayan period is simulated by means of finite difference method. At the same time, the fault?associated or derived fractures are predicted based on the control function for fracture density near faults. Comprehensive evaluation results show that the fracture developed area is mainly distributed in the sand body area and near the fault zone, with the prediction accuracy of 78%, providing reasonable geologic bases for optimization of the favorable exploration target area