丛式气井智能化泡沫排水采气工艺在延北项目的应用  

Smart foam drainage in cluster gas wells and its application to Yanbei project

作　　者：翟中波 舒笑悦 陈刚[3] 漆世伟 王斌 余潮 王泰基 王睿峰 ZHAI Zhongbo;SHU Xiaoyue;CHEN Gang;QI Shiwei;WANG Bin;YU Chao;WANG Taiji;WANG Ruifeng(Schlumberger Copower Oilfield Services Co.,Ltd.Xi'an,Shanxi 710016,China;Chengdu College of University of Electronic Sci-ence and Technology of China,Chengdu,Sichuan 611731,China;Shanxi Yanchang Petroleum(Group)Exploration Company,Yan-an,Shanxi 716000,China;Schlumberger China Co.,Ltd.Beijing,100015,China)

机构地区：[1]斯伦贝谢长和油田工程有限公司,陕西西安710016 [2]电子科技大学成都学院,四川成都611731 [3]陕西延长石油(集团)有限责任公司油气勘探公司,陕西延安716000 [4]斯伦贝谢中国公司,北京100015

出　　处：《天然气技术与经济》2021年第2期16-20,45,共6页Natural Gas Technology and Economy

摘　　要：为了充分认识丛式气井智能化泡沫排水采气工艺对积液气井排水采气的作用效果及其经济性,为鄂尔多斯盆地延北项目排水采气策略的制订提供理论和实际指导数据,以逐渐积液的丛式气井为研究对象,分析了采用智能泡排气井的油套压、温度、气量等生产参数的变化趋势,并与常规人工注剂做了经济性对比。研究结果表明:①丛式气井智能泡排设备安装调试便捷、运行稳定,结合延北项目的数字化气田项目使用,可以远程操控管理(调整注剂制度、安全高效),节省人力物力,实现了一泵对井丛多个井口的全天候泡排剂加注,能够完全满足产水气井泡沫排水采气的注剂需求;②使用丛式气井智能泡排注剂之后,气量稳定且增加显著,套压稳定并缓慢下降,油套压差不断减小,平均油套压差比人工加注降低1.4 MPa,温度也相对稳定,排水效果良好,气井积液问题得到了根本性的解决;③综合经济性能优异,较之于人工注剂,丛式气井智能泡排系统的花费降低了22.4%,丛式气井井台日增气量为1.36×10^(4) m^(3)/d,日产气量增加24.8%。结论认为,丛式气井智能泡排排水采气效果明显,综合经济性能较好,有较高的推广应用价值。In order to sufficiently recognize an effect of smart foam drainage in cluster gas wells on drainage gas recovery in liquid-loading gas wells and provide theoretical and practical guidance data for formulating a strategy of drainage gas re⁃covery in Yanbei project,the change trend of production parameters in some gas wells with smart foam drainage(e.g.tub⁃ing/casing pressure,temperature,and production rate)was analyzed by taking cluster gas wells with gradual liquid loading of Yanbei project as objectives.Then,it was economically compared with conventional manual injection.Results show that(1)during the smart foam drainage in cluster gas wells,the equipment is of convenient installation,and debugging and sta⁃ble operation.Combined with digitalized gasfield of Yanbei project,the smart foam drainage can provide remote control and management(agent injection system adjustment,safety and efficiency),save manpower and material resource,realize all-weather injection of foam drainage agent at multiple wellheads of one cluster well by using only one pump,and com⁃pletely meet the injection need of the foam drainage gas recovery in water-producing gas wells;(2)after its application,the gas-producing rate maintains stable and rises significantly,the casing pressure keeps stable and declines slowly,the tubing/casing pressure difference decreases continuously,and the average tubing/casing pressure difference is 1.4 MPa low⁃er than that of manual injection,the temperature is also relatively stable,the drainage effect is remarkable,and the liquid loading is solved fundamentally;and(3)its comprehensive economic performance is good.Compared with manual injection,the expenditure is decreased by 22.4%,the gas increment of cluster well pad is 13.6×10^(3) m^(3)/d,and the daily production is increased by 24.8%.In conclusion,the smart foam drainage in cluster wells is not only remarkable in drainage gas recovery and significant in economic benefit, but also worth spreading.

关 键 词：气井积液 智能化 泡沫排水采气 丛式气井 智能泡排注剂 远程管控 鄂尔多斯盆地 

分 类 号：TE377[石油与天然气工程—油气田开发工程]