关键词: 海拉尔盆地, 贝尔断陷, 变质岩储层, 储集特性, 断块潜山, 侵蚀残丘潜山, 油藏类型

Abstract: The metamorphic buried hill reservoir discovered in Beir Fault Depression of Hailar Basin has a large scale and high oil production.The reservoir can be identified in section as weathered zone(detrition belt),fracture-dissolved pore-dissolved cave belt and tight zone.The former two zones have the oil-storing property in fracture,pore and cave.These zones formed under the actions of some factors such as acute faulting,weathering,leaching and lake water erosion in long term.The massive eroding residual buried hill reservoirs,buried hill reservoirs in inverse fault block and laminate irregular buried hill reservoirs in consequent fault block were commonly found in this area.These oil pools are of favorable property of reservoir,good quality of oil and high production in single well.In particular,oil and gas enriched in high place of the inverse ridge,because fracture,dissolved pore and dissolved cave developed in this place.The accumulation property of buried hill has no relation with buried depth.

Key words: Hailar Basin, Beir Fault Depression, metamorphic reservoir, accumulation property, fault block buried hill, massive eroding residual buried hill, reservoir type