Abstract:Abstract: Metamorphic rock burial hill reservoir of Bell rift in Hailaer Basin, with large scale reservoir and high output, has complex fault system. The fault throughgoing direction roughly is NEE direction, and has wide fault section and lateral quickly changed fault displacement. Through the analysis of the core, debris, electric curve and seismic cross section, this paper confirms that metamorphic rock reservoir can be divided in the vertical: weathered fracture zone, crack and corroded hollow and cave development belt, and tight zone. Accumulation is controlled by hydrocarbon ability of source rock, contacting relationship of source rock and reservoir, oil storage ability of reservoir, and vertical and lateral oil-gas migration of fault and unconformity surface. And formed top surface weathering crust accumulation pattern which the oil and gas is lateral migration along the unconformity surface, and inside reservoir pattern of crack broken zone accumulation which oil and gas has the vertical migration along fault.