胜利油田蒸汽驱生产井高效举升配套技术

胜利油田蒸汽驱生产井产液温度高、H2S含量高、出砂、结垢，导致举升系统腐蚀、泵效低、卡泵等问题突出，针对这一现状，开展了蒸汽驱生产井高效举升配套技术研究。通过结构改进和参数的优化设计提高了抽油泵及井口密封装置的适应性，通过有限元模拟分析优化了抽油泵泵筒及柱塞间的密封间隙，运用高温高压试验优选了抽油泵阀副的材质，以适应高温条件下柱塞泵筒的密封需求。通过优化结构、优选密封盘根材质和耐高温防腐光杆，形成了耐高温防腐光杆密封技术。室内试验证明，研发的有杆泵举升配套工具在泵挂处温度200℃、井口温度170℃时仍能保持良好的性能；现场应用58井次，最长生产896 d且持续有效，检泵周期平均延长207 d，减少换盘根82次，泵效平均提高9.2%，单井平均日增油0.7 t。研究结果表明，蒸汽驱生产井高效举升配套技术能够有效解决蒸汽驱油井的腐蚀、卡泵等问题，提效增油效果明显，应用前景广阔。 

Efficient Lifting Supporting Technology for Production Wells in the Shengli Oilfield Steam Flood

Severe environment of steam flooding producers in the Shengli Oilfield,such as high temperature and high H2S content of produced liquid,sanding and scaling,has caused a range of problems including lifting system corrosion,low pump efficiency,and stuck pumps.To solve these quite diverse problems,we conducted study on the efficient lifting supporting technologies used in the steam flooding producers.It was found that the adaptability of pumping unit and wellhead sealing device could be improved through structure modification and parameters optimization.Using finite element simulation analysis,the seal gap between pump cylinder and the plunger was optimized.In addition,HTHP materials testing could help optimize the pump valve ball and seat,and improve the sealing for the plunger and cylinder under high temperature.High-temperature resistant and anti-corrosion polished rod sealing technology was developed by optimizing the structure and packing materials.The pilot test demonstrated that the innovated supporting device for sucker rod pump lifting maintained good performance under 200℃ at pump setting depth and 170℃ at wellhead.The technology has been applied in 58 wells with the longest production period over 896 days.The period of the pump inspection was extended by 207 days on average,and replacement of the packing was reduced 82 times.Pump efficiency increased by 9.2% on average,and the average daily oil production increased by 0.7 tons.The study results show that the efficient lifting supporting technologies can effectively solve the problems of corrosion and stuck pumps in steam flooding wells with remarkable improvement in oil production and wide application prospects.