CAJ | 학술논문

天然气井累积液量过多是天然气开采所面对的一个重大问题。涡流排水工艺结构简单、施工方便、环保高效，对解决气井积液有很好的应用前景。目前，针对天然气井中涡流排水采气机理及其内部流体流动规律仍缺少理论方面的研究。因此，为了更深入的了解井下天然气流场的一般规律、验证排液采气机理，在此基础上建立了涡流工具的三维立体模型，并使用流体动力学常用计算方法，通过使用 Fluent 多相流 mixture模型对井内流体流动进行数值模拟计算。通过观测井端出口处液体含量以及径态分布规律，观察气液两相流状态及流动轨迹，并分析了涡流工具对天然气井流场的影响规律。揭示涡流工具工作机理，推动认识涡流排水采气工艺的本质，为工艺工况优选提供依据和方向，为涡流排水技术的应用及动力学模拟奠定理论基础。
천연기정루적액량과다시천연기개채소면대적일개중대문제。와류배수공예결구간단、시공방편、배보고효，대해결기정적액유흔호적응용전경。목전，침대천연기정중와류배수채기궤리급기내부류체류동규률잉결소이론방면적연구。인차，위료경심입적료해정하천연기류장적일반규률、험증배액채기궤리，재차기출상건립료와류공구적삼유입체모형，병사용류체동역학상용계산방법，통과사용 Fluent 다상류 mixture모형대정내류체류동진행수치모의계산。통과관측정단출구처액체함량이급경태분포규률，관찰기액량상류상태급류동궤적，병분석료와류공구대천연기정류장적영향규률。게시와류공구공작궤리，추동인식와류배수채기공예적본질，위공예공황우선제공의거화방향，위와류배수기술적응용급동역학모의전정이론기출。
The liquid loading of gas well is an important issue in exploitation of natural gas. The technic of vortex drainage has good application prospect to solve the gas effusion because the tool is convenient to construct and it plays an important role in the protection of environment, the technic is environmental and efficient. Currently, the mechanism of the vortex drainage and the theory of fluid motion are still missing. Therefore, in order to get better understanding of the general rule of the downhole natural airflow field and verify the drainage mechanism, a three-dimensional structural model of vortex tools was established, the fluid flow was calculated by Fluent based on fluid dynamics and mixture model of multiphase. By monitoring the wellhead liquid content and radial distribution,and observing the state of the gas-liquid flow and the path line, the effect of vortex tool on gas well flow field was analyzed. The study reveals the working mechanism of vortex tools and facilitates understanding of the nature of the vortex drainage process. The paper can provide theoretical basis for application and dynamics simulation of vortex drainage technology.