Abstract: As one of the important block for increasing the reserves and production of Jiyuan Oilfield, the major producing oil layer of Triassic Chang-8 reservoir of Huang-3 block belongs to typical super low permeability reservoir. In recent years under injection of injection wells is particularly obvious. In order to effectively replenish the formation energy of Huang-3 Chang-8 reservoir and reduce productioin decline of the Oilfield, this paper analyzed the causes for under injection of injectors in terms of formation, wellbore and surface water injecting equipment through studying the characteristics of Chang-8 reservoir, compatibility of injected water, wellbore control and water injection system, presented corresponding control measures in combination with the actual situation on the field and evaluated the effects of the treatment. This shall provide references for similar reservoir management in the future.