敖南油田已投产31口水平井,通过近几年的开发实践,发现水平井见水后,通过层段调整控水效果不理想,后续逐渐摸索周期注水。虽然取得了一定效果,但是在周期注水制度的制定上,主要靠经验判断。本文通过理论分析,根据压力波传播时间及合理注采比确定周期注水强度和开关周期,为进一步优化水平井周期注水制度提供了依据。 Aonan Oilfield has put into operation 31 horizontal wells. Through the development and practice in recent years, it is found that after the horizontal wells see the water, the effect of controlling water diversion by layers is not satisfactory and the subsequent water flooding is gradually explored. Although achieved some results, but in the cycle of water injection system, mainly by experience to judge. In this paper, the periodic water injection intensity and switching cycle are determined according to the propagation time of pressure wave and reasonable injection-production ratio through theoretical analysis, which provides the basis for further optimizing the water injection system in horizontal well.