致密气水平井带压修井关键技术研究及应用  

Application of Key Workover Technology under Pressure forTight Gas Horizontal Wells in Changqing Oilfield

作　　者：杨青松[1] 文绍桃 王斐 杨文[1] 杨飞 翟洪柱 何兆纬 YANG Qingsong;WEN Shaotao;WANG Fei;YANG Wen;YANG Fei;ZHAI Hongzhu;HE Zhaowei(The First Gas Production Plant,Changqing Oilfield Company,Jingbian 718500,China;Xinjiang Training Center,PetroChina Xinjiang Oilfield Company,Karamay 834000,China;Xi'an Changqing Tongxin Petroleum Technology Co.,Ltd.,Xi'an 710000,China;Tianjin Branch,CNOOC(China)Co.,Ltd.,Tianjin 300459,China;PetroChina Tuha Oilfield Company,Hami 839000,China)

机构地区：[1]中国石油长庆油田分公司第一采气厂,陕西靖边718500 [2]中国石油新疆油田公司新疆培训中心,新疆克拉玛依,834000 [3]西安长庆同欣石油科技有限公司,西安710000 [4]中海石油(中国)有限公司天津分公司,天津300459 [5]中国石油吐哈油田分公司,新疆哈密839000

出　　处：《石油矿场机械》2025年第2期83-91,共9页Oil Field Equipment

基　　金：中国石油天然气集团公司科技项目“气井带压作业技术推广”(2020B-4121(JT))。

摘　　要：针对长庆油田部分致密气水平井出现油管穿孔、节流器故障等问题,根据管串基本尺寸、结构特点、井筒压力、井筒环境等因素,合理选择设备配套和压力控制工艺技术,形成了带压修井处理节流器工艺。结合现场管内异常复杂情况,通过管柱力学分析、计算中和点及油管无支撑长度控制,以及油管压力控制、带压倒扣、对扣等工艺技术的优化应用,形成了关键井控技术推荐方法,保障了工艺的可靠性和安全性。该工艺克服了常规修井污染储层、影响产能、作业后排液复产困难、废液处理等问题,现场在30口水平井进行了成功应用,恢复气井产能可达每年近5.0×10^(9) m^(3),涵盖油管穿孔、断脱、节流器断脱、变形、砂埋等复杂工况,最高作业压力23 MPa,有效验证了工艺的可靠性,已成为低渗透致密气藏水平井井筒故障治理的一项重要技术,为气田安全经济高效开发提供了有力支撑。Focus on the problem of tubing perforation,and downhole chock fault of tight gas horizontal wells in Changqing Oilfield,resulting in gas well can not produce.Combined with the string size,structural characteristics,well pressure,well condition,etc..By supporting reasonable equipment and optimizing pressure control process technology,the technology of workover under pressure to dispose of faulty downhole chock was developed.Based on the unusual complexity of tubing,through theoretical calculation of pipe string mechanics and optimization to control the no-support length of tubing,combined with optimization and application of key well control technologies of tubing pressure control,back-off,and button-down operation under pressure,the recommended practices of key technologies were summarized and formed,which guaranteed the reliability and safety.This technology overcomes the problems of reservoir pollution,production capacity reduction,difficulty in reproducing after drainage,and liquid waste disposal caused by conventional workover operations.This technology has been successfully applied on 30 horizontal tight gas wells,which recovered production of about 500 million m^(3) per year.Complex operating conditions are included in tubing perforation,and downhole chock rupture,deformation,sand burial.The maximum working pressure is 23 MPa.Experimental and application results show that the technology has a safe and stable operation process,which has become an important technology of wellbore failure treatment for low permeability tight gas reservoir horizontal wells,and provided strong support for the safe,economic,and efficient development of gas fields.

关 键 词：致密气藏 水平井 带压修井 井控技术 气田开发 

分 类 号：TE935[石油与天然气工程—石油机械设备]