关键词: 二连盆地, 下白垩统, 断陷结构, 坡折带, 断裂调节带, 岩性地层油藏

Abstract: On the basis of seismic,logging and drilling information,the property of the stratigraphic and lithologic reservoirs in the Lower Cretaceous of Erlian Basin were analyzed with the sequence stratigraphy.Three factors for controlling the structure of those reservoirs include the rift structures,the sand control patterns of slope break and the fault-transfer zones,which influence petroleum accumulation in this area.The rift structure can be divided into three types of single fault overlap,single fault trough and complex type.The slope break has six patterns,including steep slope fault scrap and nearshore subaqueous fans,steep slope fault ramp and nearshore subaqueous fans and turbidite fans,steep slope fault bench and fan-delta and turbidite fans,gentle slope and braided river delta and fan-delta,gentle slope flexure and fan-delta and turbidite fans,and gentle slope fault bench and braided river delta or fan-delta and turbidite fans.There are four types faults-transfer zones in Erlian Basin,such as fault bend type,fault fracture type,fault intersection type and fault trace rift type.The analyses of different factors for controlling the structures can provide some information for exploring of stratigraphic and lithologic reservoirs in Erlian Basin.

Key words: Erlian Basin, Lower Cretaceous, rift structure, slope break, fault-transfer zone, stratigraphic and lithologic reservoirs