延X井区产水气井生产状况分析  

Analysis on Production Characteristics of water producing Gas Wells in Yan X well block

作　　者：翟中波 杜奎甫 张凤琼[3] 胡苗 杨卫刚 田明山 ZHAI Zhongbo;DU Kuifu;ZHANG Fengqiong;HU Miao;YANG Weigang;TIAN Mingshan(Schlumberger Copower Oilfield Services Co.,Ltd.,Xi’an 710061,Shaanxi,China;Shaanxi Yanchang Petroleum(Group)Exploration Company,Yan’an 716002,Shaanxi,China;Chongqing Gas Mine,Southwest Oil and Gas Field Branch,Chongqing 401147,China)

机构地区：[1]斯伦贝谢长和油田工程有限公司,陕西西安710061 [2]斯伦贝谢中国公司,北京100015 [3]西南油气田分公司重庆气矿,重庆401147

出　　处：《油气井测试》2022年第3期21-27,共7页Well Testing

摘　　要：延X井区属于致密气项目,为低压集输系统,易造成气井积液甚至水淹完全不能生产。模拟气井不同生产阶段的储层状况、气液流速及排液能力,结合李闽、Turner和Gray模型,分析了气井积液的机制,安装井下节流器能够降低集输压力,防止水合物冰堵,随着储层压力降低,节流器下部易发生积液,需要及时拔出节流器并配合其它排水采气措施生产;速度管能够降低临界携液流速,使气井保持长期稳定生产。现场Y05井应用效果表明,安装井下节流器、速度管等排水采气措施后,效果显著。该技术可有效提高延X井区致密气项目的最终采收率。In Yan X well block,which is a tight gas project,the gathering&transmission system is a low-pressure system,which may cause gas well liquid loading or even complete water flooding,resulting in failure of production.In this paper,the reservoir conditions,gas-liquid velocity,and drainage capacity of gas wells in different production stages are simulated,and coupling with the models proposed by Li Min,Turner and Gray,the mechanism of gas well liquid loading is analyzed.The results show that the downhole choke can be installed to reduce the gathering&transmission pipeline pressure and prevent hydrate ice blockage;however,with the decrease of reservoir pressure,the lower part of the choke is prone to liquid loading,so it is necessary to pull out the choke in time and cooperate with other processes of gas recovery by water drainage.Moreover,the velocity string can reduce the critical liquid carrying flow rate and thus keep the gas well in long-term stable production.The application in Well Y05 shows remarkable effect after installing downhole choke and velocity string.This technology is believed to effectively improve the ultimate recovery of tight gas in Yan X well block.

关 键 词：产水气井 致密气藏 排水采气 井下节流器 速度管 积液 排水机制 水气比 

分 类 号：TE377[石油与天然气工程—油气田开发工程]