关键词: 大庆油田, 高含水, 精细分层, 注水工艺

Abstract: As Daqing Oilfield entered into extra-high water cut period, subdivision water injection technology has been executed in order to enhance the effect of water flooding development. The average water injection layers in single well are increased from four to seven. Because of the increasing of subdivision layer number in longitudinal layer, some problems on the technology need to be solved, such as installing packers over the thinner interlayer, configuring eccentric water injection allocator in the smaller stuck distance and so on. At the same time, because the number of separate layer water injection tool increases, it brings some problems such as difficult deblocking during replacing the string and poor well-flushing of string. Therefore, we need study the thickness standard of effective interlayer, develop separate layer water injection tool and test running, fishing tool adapting to thin interlayer and small stuck distance, study matched technologies which ensure effective deblocking and high-efficiency well-flushing to meet the technological requirements of subdivision water injection. Key words:

Key words: Daqing Oilfield, high water cut, subdivision, water injection technology