本文通过作者多年工作的经验。结合克拉玛依油田老区重复压裂实例,简述了重复压裂造缝机理和老井压裂成败原因;同时通过地层固有应力分析,介绍了垂直裂缝、水平裂缝与重复压裂增产效果关系。为深入研究重复压裂技术、提高重复压裂水平提供了借鉴。 This article through the author’s many years of work experience. Combined with the example of repeated fracturing in the old area of ​​Karamay Oilfield, the mechanism of repeated fracturing and seaming and the reason of the failure of the old well are briefly described. At the same time, the relationship between the vertical fractures and the horizontal fractures and the effect of repeated fracturing stimulation are introduced through the analysis of the inherent stress of the strata. It provides reference for further study on the technology of repeated fracturing and the improvement of the level of repeated fracturing.