Abstract:The igneous buried hill of Huizhou 26-6 Oilfield in Pearl River Mouth Basin has complex lithology, developed fractures and the reservoir is highly heterogeneous,the conventional single seismic fracture prediction technique can not finely characterize the distribution of fractures.A fracture modeling method based on strictly controlled by lithology and main controlling factors is presented in this article.Firstly, the spatial distribution of main lithologic bodies of the igneous buried hill is described by drilling and seismic data,and the the lithology model of igneous rock is also established. Secondly,the probability trend bodies of fracture density for different genetic types of fractures are built by the quantitative characterization of geological main control factors under lithofacies constraints is established by quantitative characterization method of geological main control factors. On this basis, taking the fracture density at the well point as the prior information,and the probability trend bodies of fracture density as the constraint condition,the fracture density model is established by stochastic simulation method.,Then,using the fracture density model and well point statistical fracture parameters as input information,the discrete fracture network model is established by geostatistical method. Finally,the discrete fracture network model is equivalented to the fracture property model by Oda algorithm in Petrel software.In the modeling process,both the dynamic and static methods are used to optimize the quality control of the fracture model,to ensure that the result accords with the understanding of geological features of reservoirs.The final model can well characterize the fracture development characteristics of different lithologic reservoirs in different parts of buried hill,and can effectively guide the preparation of oil and gas field development plan.