Abstract: The reservoir space of bedrock oil reservoir is dominated by fractures, and the effect of exploration and development depends on the precision of fracture-developed interval prediction. In view of much difficulties in reservoir prediction and other problems due to strong heterogeneity of bedrock reservoirs and multiple main controlling factors of fracture development, based on a study case of Xinglongtai buried hill in Liaohe Oilfield, this paper briefly analyzed comprehensively the drilling, logging, testing and seismic data, to identify the geological, seismic and productivity characteristics of fracture-developed zones. The results showed that the reservoirs of inner buried hill were divided into three types: acid intrusive rock and migmatitic granite were the most dominant lithology in the inner buried hill, with the most developed fractures and a certain stratification, followed by migmatitic gneiss and neutral intrusive roc, and next by gneiss. Basic intrusive rocks and amphibole were non-reservoirs.On the basis of fracture identification, the three-dimensional distribution pattern of favorable reservoirs was accurately characterized, which could effectively improve the reservoir penetration rate and production effect of development wells. The study results are an important reference for the development of similar reservoirs at home and abroad.

Key words: bedrock reservoir, fracture, reservoir classification and evaluation, reservoir prediction, Xinglongtai buried hill