Low permeability reservoirs in Yanchang Oilfield encounter substantial water injection challenges,resulting in low recovery and high costs.This study systematically examines the geological characteristics,fluid properties,and under-injection causes of these reservoirs.It proposes a surfactant system combining non-ionic and petroleum sulfonate to reduce injection pressure and enhance recovery rates,offering scientific and technical support for efficient development.
关键词
延长油田/低渗透油藏/表面活性剂/降压增注
Key words
Yanchang Oilfield/low-permeability reservoir/Surfactant/Pressure-reducing and injection-enhancing
维普
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