方法应用理想变管径毛管和数理分析方法，研究了低渗透油层水自发吸渗驱油的微观机理。目的改善低渗透油田注水开发效果。结果吸渗驱油采出程度与时间是指数函数关系，研究结果与他人实验结果一致。结论低渗透油田注水开发时，应考虑吸渗驱的影响因素，以提高其开发效果 Methods The microscopic mechanism of spontaneous imbibition and flooding of low permeability reservoir water was studied by the ideal capillary tube and mathematical analysis method. Aim To improve the effect of waterflooding in low permeability oilfields. Results The degree of imbibition and oil recovery and the time is an exponential function, and the results are in agreement with those of others. Conclusions In the development of low permeable oilfield waterflooding, the influencing factors of imbibition drive should be considered in order to improve its development effect