CAJ | 학술논문

本文应用节点系统分析方法,以节流装置为节点,将井筒压力温度预测分为井底到节流装置,节流装置以及节流装置到井口,基于气井流体质量、动量和能量守恒以及井筒径向传热理论,建立了气井井筒压力温度耦合预测模型。将节流过程视为绝热过程,根据节流过程能量守恒原理,并忽略位能差,导出了流体节流过程中焓变计算模型。实例计算表明,本文建立的气井井下节流压力温度耦合预测模型能为气井井下节流动态分析、井下节流器工艺参数设计、水合物防治提供必要的技术依据。
본문응용절점계통분석방법,이절류장치위절점,장정통압력온도예측분위정저도절류장치,절류장치이급절류장치도정구,기우기정류체질량、동량화능량수항이급정통경향전열이론,건립료기정정통압력온도우합예측모형。장절류과정시위절열과정,근거절류과정능량수항원리,병홀략위능차,도출료류체절류과정중함변계산모형。실례계산표명,본문건립적기정정하절류압력온도우합예측모형능위기정정하절류동태분석、정하절류기공예삼수설계、수합물방치제공필요적기술의거。
Wellbore is divided into bottom hole to choke,choke and choke to wellhead through using nodal system analysis and setting choke as nodal point.A coupled model,based on mass,momentum,energy conservation and wellbore heat transfer principles,is established to prediction flow pressure,temperature profiles in gas wells with a downhole choke.Gas flow through choke considered as an adiabatic process,an equation is derived according to total energy conservation to describe enthalpy change between upstream and downstream of choke.The example calculation show that the established model can provide the technical reliance for the dynamical analysis,technology parameter design of downhole choke and gas hydrate prevention of gas well.