摘要
在超深高压高温高含硫气井复杂工况下,试井作业极易发生井口冻堵、垢物遇卡、高压流体刺漏、有毒气体刺漏、工具意外落井与井下遇卡等极端事故,存在井控与作业安全风险。在借鉴前人作业经验与研究成果以及相关标准作业规范的基础上,从风险辨识、设备与工具选型和施工流程等方面进行分析,针对性提出了一系列优化与改进措施,规范井口防喷装置配置标准,优化动态密封系统,完善施工作业程序,形成超深高压气井试井作业技术,并在超深高压井X-O井中得到成功应用,验证了措施的可靠性。该技术对超深高压气井的试井作业具有一定的指导作用。
During well testing of ultra-deep,high pressure,high temperature,and high sulfur gas wells,extreme incidents,such as wellhead freezing blockage,scale sticking,high-pressure fluid leakage,toxic gas leakage,accidental tool drop,and downhole sticking,are very likely to occur to threaten well control and testing operation.Based on previous practices and researches,and as per relevant standards/specifications,an analysis was conducted on well testing from the aspects of risk identification,equipment/tool selection,and operating process.A series of optimization and improvement measures were proposed specifically,that is,standardizing the configuration of wellhead blowout preventer,optimizing the dynamic sealing system,and improving the operating procedures.The successful application in an ultra-deep high-pressure well X-O verified the reliability of these measures.This technology has a certain guidance for the well testing of ultra-deep high-pressure gas wells.
作者
侯明明
程欣
侯云杰
王学新
李贵廷
HOU Mingming;CHENG Xin;HOU Yunjie;WANG Xuexin;LI Guiting(Well Testing Branch,CNPC Greatwall Drilling Engineering Co.,Ltd,Beijing 100101)
出处
《油气井测试》
2022年第5期48-53,共6页
Well Testing
关键词
高温高压井
含H
2S气井
试井作业
冻堵
井下遇卡
防喷装置
密封系统
风险辨识
HTHP well
H 2S-containg gas well
well testing
freezing blockage
downhole sticking
blowout preventer
sealing system
risk identification
