Development technology progress of heavy oil and establishment and application practice of new classification standard:A case study of development of heavy oil in Shengli Oilfield
Heavy oil reservoirs are crucial strategic resources that play a significant role in ensuring national energy security.The development of heavy oil both domestically and internationally primarily involves four technologies:steam huff and puff,steam flooding,Steam Assisted Gravity Drainage(SAGD)and fire flooding.However,due to issues such as technical adaptability,high costs and environmental concerns,the promotion and application of these technologies face certain limitations.At Shengli Oilfield,three innovative technologies have been developed to overcome these limitations:thin-layer horizontal wells,thermochemical composites and chemical viscosity reduction.These advancements have pushed the boundaries of development technology,reducing the effective thickness limit of heavy oil reservoirs to two meters,the depth limit to 2 000 meters,and the permeability limit to 100×10-3 µm2.Based on the technical characteristics and field application effects,a new classification standard of heavy oil based on technical adaptability has been established.This standard divides heavy oil reservoirs into five categories to guide the selection of development technology at the field level.Looking forward,it is projected that"multi-thermal composites","non-thermal development"and"nano-materials"will be the three main trends in heavy oil development technology.
heavy oil reservoirtechnology progressboundary expansionnew classification standardapplication practicedevelopment direction
NETL
NSTL
万方数据
