关键词: 湖盆三角洲, 低渗透油田, 层序地层学, 整体压裂, 注气开发, 靖安油田

Abstract: Jingan Oilfield is discovered in 1990s.It is an integrative oilfield with special lower permeability and 0.3 billion tons of reserve and belongs to a typical sedimentation system of large lake delta.Delicate description technique for reservoir in combination of lake delta sedimentation micrafacies and sedementation sequence is the basis of successful exploitation for Jingan Oilfield.The advanced water injection technique for reservoir with low pressure and permeability features suppresses effectively the bad effect of throat blockage resulting from clay swelling at pressure-declined areas in the clastic rock formation with a high shaly content (20%).Establishment of a production mode with an effective displacement system in the early period of reservoir makes a stable output of a single well increased obviously.Adapting the division units affected by reservoir hydrodynamics,the plane radial adjusting technique and trace research with reservoir numerical simulation,the reservoir has successfully realized no-water production for 6 years.The recovery factor has been raised from 17% designed in project to 24%.The integrated exploitation and fracturing technique favorable for the reservoir with a special low permeability and a production mode with gas injection and gas-water alternative injection have been approached in this oilfield

Key words: Jingan Oilfield, low permeability reservoir, strategraphy, delicate description of reservoir, integrative fracturive, gas injection production, application effectiveness