旋流雾化排液采气工艺及其关键参数  

Cyclone atomization based drainage gas recovery technology and its key parameters

作　　者：薛承文[1] 谢文强[2] 高涵[1] 池明[1] 张国红[1] 郭玲 薛亮[3] Xue Chengwen;Xie Wenqiang;Gao Han;Chi Ming;Zhang Guohong;Guo Ling;Xue Liang(Engineering Technology Research Institute, PetroChina Xinjiang Oilfield Company, Karamay, Xinjiang 834000, China;Zhundong Production Plant, PetroChina Xinjiang Oilfield Company, Fukang, Xinjiang 831500, China;China University of Petroleum, Beijing 102249, China)

机构地区：[1]中国石油新疆油田公司工程技术研究院 [2]中国石油新疆油田公司准东采油厂 [3]中国石油大学(北京)

出　　处：《天然气工业》2018年第6期76-82,共7页Natural Gas Industry

基　　金：中国石油天然气股份有限公司重大科技专项"新疆油田和吐哈油田勘探开发关键技术研究与应用"(编号:2017E-0410)

摘　　要：气水同产井在生产过程中,由于地层能量逐渐下降易产生井底积液,严重影响了气井的产能,甚至会造成气井水淹停产,常用的排液采气工艺需要借助外部能量或更换生产管柱,工艺运行成本高。为此,以Turner模型为理论基础,设计了旋流雾化装置将井底积液雾化为细小的液滴,以便容易被携带出气井井筒;进而开展旋流雾化数值模拟、室内可视化实验及现场试验确定旋流雾化排液采气工艺关键技术参数。研究结果表明:(1)实施旋流雾化排液采气工艺使气井能够在不增加外部能量的条件下将井底积液排出,实现气井的连续携液生产;(2)该工艺具有对气井凝析油含量不敏感、作业方便、生产成本低及装置工作可靠性高等优点;(3)旋流雾化排液采气工艺关键技术参数为:最大下入井深4 200 m,工作温度120℃,气井气液比大于1 100 m^3/m^3、产液量小于20 m^3/d,工具外径58 mm或72 mm;(4)两口井现场应用效果好:水淹气井滴西17井成功复产并实现连续携液生产,大直径油管完井的K82006井携液良好且气井产气量稳定。结论认为,旋流雾化排液采气工艺作为一种不动原井生产管柱、不增加外部能量的排液采气工艺,值得推荐。During the production of a gas/water producing well, liquid tends to accumulate easily at the bottom hole due to the gradual decline of formation energy. And consequently, the productivity of the gas well is seriously impacted and the gas well may be even watered out and shut down. The operation cost of commonly used drainage gas recovery technologies is high, for they need the external energy or the replacement of original production string. In this paper, a cyclone atomizer was designed on the basis of the Turner model. By virtue of the cyclone atomizer, the liquid accumulated at the bottom hole is atomized into fine droplets, so that they can be carried out of the hole easily. Then, numerical simulation, laboratory visual tests and field tests were carried out to determine the key technological parameters of a cyclone atomization based drainage gas recovery process. And the following research results were obtained. First, with the application of this technology, bottom hole liquid loading is drained out of a gas well without any addition of external energy, making continuous liquid-carrying production possible. Second, this technology is advantageous with insensitivity to condensate content of a gas well, convenient operation, low production cost and reliable device. Third, the key technological parameters of the cyclone atomization based drainage gas recovery process are as follows. The maximum setting depth： 4 200 m; operation temperature： 120 ℃; gas/liquid ratio： more than 1 100 m^3/m^3; liquid producing rate： less than 20 m^3/d; and tool OD： 58 mm or 72 mm. Fourth, this technology has been successfully applied in 2 gas wells. Well Dixi 17, a watered gas well recovered to production successfully with continuous liquid-carrying production. Well K82006 which was completed with large-diameter tubings presented a good liquid-carrying capacity and stable gas production rates. In conclusion, the cyclone atomization based drainage gas recovery technology is worth recommending, which keeps the original

关 键 词：旋流 雾化 井底积液 排液采气 配套工具 临界流速 生产管柱 外部能量 中国石油新疆油田公司 

分 类 号：TE377[石油与天然气工程—油气田开发工程]