受温度、压力、产量等因素影响，气井管柱环空泄漏等完整性问题频繁再现。为研究工况参数对井下油管泄漏过程的影响，结合油田现场参数建立高温高压油管泄漏仿真模型并与现有小孔泄漏数学模型进行对比分析。基于仿真模型，分析油管泄漏过程中的流场变化及泄漏孔径、油套管压差、泄漏环境等因素对泄漏过程的影响。结果表明：流场变化主要集中在泄漏孔内部及泄漏孔进出口，随泄漏孔径增大，泄漏量、泄漏速度、泄漏孔内部的压力和密度均增大；油管与油套环空压差越大，泄漏量和泄漏速度越大，压力和密度变化越剧烈；气体在环空保护液上部的速度和压力大于在环空保护液段。

Due to factors such as temperature, pressure, and production rate, integrity issues like annular leakage in gas well tubing frequently occur frequently. In order to study the influence of working conditions on the process of downhole oil pipe leakage, a high temperature and high pressure oil pipe leakage simulation model was established based on field parameters and compared with the existing mathematical model of small hole leakage. Based on the simulation model, the influence of flow field change, leakage aperture, casing pressure difference and leakage environment on the leakage process was analyzed. The results show that the changes of flow field mainly focus on the inside of the leak hole and the inlet and outlet of the leak hole. With the increase of the leak aperture, the leakage quantity, leakage velocity, pressure and density inside the leak hole increase. The greater the pressure difference between tubing and oil jacket annulus, the greater the leakage amount and leakage velocity, and the more drastic the change of pressure and density. The gas velocity and pressure in the upper part of the annular protective fluid are greater than that in the annular protective fluid section.