泵上掺水稠油井工作参数优化与实施效果

Working Parameter Optimization and Implementation Effect for Heavy Oil Well Production by Adding Hot Water

稠油井泵上掺水工艺具有投入低、产出高、生产过程稳定、不影响泵效、不伤害地层的特点,并得到了广泛应用,但胜利油田孤东九区稠油掺水工作参数不合理,造成稠油井含水上升快、日产油水平下降、光杆腐蚀严重、堵塞管线被迫停井等现象,影响了正常生产。为了解决此问题,从实际掺水温度、掺水量分析出发,分析了现行掺水参数存在的问题,并对进行参数优化。结果显示,随井的距离远近、掺水温度变化大及掺水量不合理是目前研究区稠油开发效果不佳的主要原因。通过参数优化,保证每口单井的掺水温度都达到(70±2)℃,同时通过试验确定了不同阶段的合理掺水量经验公式,并制订了孤东九区稠油开发掺水管理规范,形成制度化、规范化管理。实施后,增油降本效果显著。

Heavy oil well production by adding hot water on the pump featured with low investment, high output, stable production process, no affect to the pump efficiency, no damage to the formation, etc, which has been widely used. But in Gudong 9th block of Shengli oilfield, due to unreasonable working parameters for adding water to the heavy oil, some un- wanted phenomena happened, such as water cut rising fast in heavy oil well, daily oil yield drops, sucker rod corrosion is serious, pipeline plugged resulting in shut well, all of these problems have affected the normal production. In order to solve the problem, the current parameters for adding hot water have been optimized through the analysis of water temperature and volume added. Results showed that the main reasons for poor heavy oil development effect in the studying area include two aspects, i.e. water temperature change with the distance from well, and water volume added is unreasonable. By optimi- zing the parameters, the adding water temperature for each well can be kept at 70±2℃, and an empirical formula for rea- sonable water volume added has been determined at different stages. Heavy oil production by adding hot water in Gudong 9th block has formed a systematic and standarded management, with obvious effect of oil yield increase and cost reduction.