It is difficult to predict fractures quantitatively due to the different fracture genesis and complex development laws of fractures in offshore fractured oil and gas reservoirs with different lithologies.Techniques for quantitative characterization of fractured reservoirs with different lithology were proposed by many research methods based on fracture development characteristics of reservoirs：① Quantitative characterization technique of fractured glutenite reservoirs：the sedimentary evolution simulation and target simulation are combined to predict the distribution range of intra-gravel fractures and quantitatively characterize the micro-fractures of glutenite fractured reservoirs. ② Quantitative characterization technique of fractured metamorphic rock reservoirs：an unstructured mesh subdivision was introduced in modeling to quantitatively characterize the large，medium and small fractures and their coupling relationships with matrix. ③ Quantitative characterization technique of carbonate reservoirs：the dual-mode iteration technique was used to quantitatively characterize the distribution of microfractures on the base of the multi-information and multimeans reservoir evaluation. The application of these techniques in three oil and gas fields in Bohai Sea shows that these characterization techniques provide a solid quantitative basis in the study on development schemes，with numerically simulated fitting accuracy improved by about 20%. These techniques have successfully guided the efficient implementation of more than 10 development wells during oilfield adjustment，providing a reference for efficient development of similar fractured reservoirs.