Abstract: Many reservoir prediction technologies are used for prediction and mapping of Yingshan fractured-vuggy reservoirs' vertical and lateral distributions in Tazhong area, and AVO oil-gas detection technology is applied to adjustment of the fluid property within fractures and caves. Integrating with processing, interpretation and geology, the various well-control reservoir geologic models are developed. The seismic response features of favorable reservoir bodies in high-yielding wells are given. Lots of the seismic information are used to predict reservoirs and hydrocarbon distribution in no well-drilling areas. The fracture and cave system and units are classified combining with palaeo-geomorphology, outcrop lithology, continuity of fractured-vuggy reservoir and later faulting cutting relations. Finally, the water-oil interfaces in fracture and cave units are determined according to drilling and formation test results, and the regional petroleum distribution is discussed and summarized.

Key words: Tazhong area, north slope, Yingshan formation, carbonate reservoir, hydrocarbon accumulation pattern